TNO/Centaur diameters, albedos, and densities

compiled by Wm. Robert Johnston
last modified 22 June 2014

The first trans-Neptunian object (TNO) after Pluto was discovered in 1992. Given the remoteness of TNOs, it was years before sizes were first measured for a few TNOs. For a variety of reasons (direct and indirect), TNOs are believed related to comets which are generally quite dark. The conventional wisdom in the 1990s was an initial best estimate of 0.04 for the albedo of TNOs.

Accumulated measurements of size and albedo now suggest that, while some TNOs are indeed this dark, some are significantly brighter. Reported measurements are summarized below.

Statistics on albedo values by type of object (2014):

object typeall objectsobjects with diameter < 900 km,
well constrained
countmean albedomedian albedocountmean albedomedian albedo
centaurs 610.0780.070610.0780.070
all TNOs 1120.1740.136810.1440.122
Haumea family 40.4690.478 20.5240.524
other TNOs 150.1480.125140.1530.129
cubewanos 480.1590.150290.1200.116
SDOs 100.2760.193 80.1850.170
plutinos 250.1520.100220.1140.087
other resonant 100.1260.090 60.1370.090

The relevant diameter measurements are listed below. This includes 112 TNOs (of which 53 are binary or multiple) and 61 Centaurs (including 2 binaries). The TNOs include the so-called "dwarf" planets Pluto, Eris, Haumea, and Makemake. Measurements for Pluto and Charon are limited to those published since 1986. All other diameter estimates on the pages Trans-Neptunian objects and List of known trans-Neptunian objects assume an albedo of 0.09. This is a revision in 2005 on these pages from a previous model (the old model assumed albedos of 0.09 for Centaurs, 0.04 for TNOs less than 660 km in diameter, and an increasing albedo for larger TNOs based on a best fit to observations through early 2004).

The current total of 173 TNOs and Centaurs with measured diameters/albedos compares to 129 in early 2013, 91 in 2011, 55 in 2008, 34 in 2006, and 16 in 2004. Much of the increase in the last six years is from thermal measurements from the Spitzer and Wide-Field Infrared Survey Explorer Space Telescopes and from measurements derived from orbit determinations for binary TNOs. The average albedo for Centaurs has changed little. Average values for TNOs are higher than previously reported. Some apparent factors are:

Density values have been measured or estimated for 31 TNOs and centaurs, with values ranging from 0.46 to 2.64 g/cm3. For objects with diameters greater than 900 km, the mean and median densities are 1.96 and 1.95 g/cm3, respectively. For objects with diameters less than 900 km, the mean and median densities are 1.06 and 1.01 g/cm3, respectively. For objects with diameters less than 400 km, the mean and median densities are 0.94 and 0.78 g/cm3, respectively.


Table 1: Measured diameters, albedos, and densities for TNOs and Centaurs
(modified and updated from W. R. Johnston, 2014, TNO and Centaur Diameters, Albedos, and Densities V2.0, EAR-A-COMPIL-5-TNOCENALB-V2.0, NASA Planetary Data System.)

Explanation of columns:

number/nameprov. des.typeHHVeffective
diameter (km)
primary
diameter (km)
secondary
diameter (km)
albedodensity (g/cm3)methsource
(2060) Chiron1977 UBCEN6.26.90±0.02180±40/50  0.1±0.09/0.035 * TL84a
 <372  >0.027 TS91a
6.8<300  >0.04 * TJ92a
 <166    OB93a
6.9[180.4±21.7]  0.14±0.06/0.03 * TC94a
 168±20  0.13±0.04/0.03 V TA95a
 179.2±13.6    OB96a
 >180.4±13    OB96a
 160±20  0.14±0.02 * TG00a
6.85±0.03148±8  0.17±0.02 * TF02a
7.28±0.08142±10  0.11±0.02 * TG04a
6.58233.3±14.7/14.4  0.076±0.01/0.009 V TS08a
6.2250±34/39  0.07±0.02 TS12e
6.5201.2±62.4  0.11±0.052 TB13b
5.92±0.20218±20  0.160±0.030 TF13b
6.5234  0.080±0.056/0.029 V TM13a
(5145) Pholus1992 ADCEN7.1 >189±26  <0.044±0.013 V TD93a
 185±16  [0.043±0.03] V TD96a
     0.5(H)T05a
7.63140±40  0.08±0.07/0.03 V TS08a
7.68±0.28107±18/19  0.126±0.076/0.049 V TD13a
7.0127  0.174±0.303/0.093 V TM13a
(7066) Nessus1993 HA2CEN9.69.760±16  0.065±0.053/0.025 V TS08a
9.51±0.2257±17/14  0.086±0.075/0.034 V TD13a
9.657  0.079±0.092/0.039 V TM13a
(8405) Asbolus1995 GOCEN9.1 66±4  0.12±0.03 * TF02a
 77.5±7.5  0.095±0.015 V TS05a
9.1584.2±7.8  0.055±0.013/0.009 V TS08a
9.13±0.2585±8/9  0.056±0.019/0.015 V TD13a
9.086  0.060±0.040/0.023 V TM13a
(10199) Chariklo1997 CU26CEN6.6 302±30  0.045±0.01 * TJ98a
 273±19  0.055±0.008 * TA01a
6.7±0.2236±12  0.07±0.01 * TG04a
 225±25  0.1±0.02 V TS05a
6.66258.6±10.3  0.057±0.005/0.004 V TS08a
6.6219±30/34  0.08±0.03/0.02 TS12e
6.66226.1±29.3  0.075±0.015 TB13b
7.40±0.25248±18  0.035±0.010 TF13b
6.4263  0.071±0.044/0.028 V TM13a
(10370) Hylonome1995 DW2CEN8.69.4170±20  0.062±0.05/0.03 V TS08a
9.51±0.0877±15  0.048±0.027/0.014 V TD13a
8.088  0.144±0.378/0.069 V TM13a
(15789)1993 SCPLU7.0 328±58/66  0.022±0.013/0.006 * TT00a
 398±108/171  0.035±0.016/0.013 R T*G05a
 398±110/171  0.035±0.016/0.013 V TC06a
(15820)1994 TBPLU7.38<451.3±176.1/145.4  >0.006±0.006/0.003 V TS08a
7.191  0.310±0.243/0.160 V TM13a
(15874)1996 TL66SDO5.4 632±84/98  0.03±0.012/0.007 * TT00a
 <958  >0.018 R T*G05a
 <958  >0.018 V TC06a
5.46575±116/115  0.035±0.02/0.011 V TS08a
5.39±0.12339±20  0.11±0.021/0.015 V TS12a
(15875)1996 TP66PLU7.0 350±50  0.03±0.01 V TS05a
7.42160±45  0.074±0.07/0.03 V TS08a
7.51±0.09154±28.8/33.7  0.074±0.063/0.031 V TM12a
(19308)1996 TO66HAU4.54.5<897  >0.04 * TA04a
 <902  >0.033 R T*G05a
4.5409  0.168±0.221/0.082 V TM13a
(19521) Chaos1998 WH24CUB4.84.9<742  >0.04 * TA04a
 <747  >0.058 R T*G05a
5.00±0.06600±140/130  0.05±0.03/0.016 V TV12a
(20000) Varuna2000 WR106CUB3.6 900±129/145  0.07±0.03/0.017 R TJ01a
     >1.05(H)J02a
 1060±180/220  0.038±0.022/0.01 V TL02a
 936±238/324  0.037±0.011/0.014 R T*G05a
 600±150  0.21±0.09 V TS05a
3.94586±190/129  0.14±0.09/0.06 V TC06a
     0.992±0.086/0.015(H)L07a
3.99500±100  0.16±0.1/0.08 V TS08a
 714±178/128  0.088±0.042/0.031 V T*B09a
3.7816  0.088±0.089/0.049 V TM13a
(24835)1995 SM55HAU4.84.8<701  >0.04 * TA04a
 <704  >0.067 R T*G05a
(26181)1996 GQ21SDO5.25.2262  0.214±0.291/0.102 V TM13a
(26308)1998 SM1651:2**5.8 [244.4]232[77]0.15 *A 1YM04a
  238±54 0.14±0.06 RA 1±1/0.5Y*G05a
6.13[302.6]287±3696±120.07±0.02 V0.51±0.29/0.14T (Y)S06b
6.38279.8±29.7/28.6  0.063±0.015/0.012 V TS08a
 [238.4]229±51[66.3]0.105±0.045 VA 1±1/0.5Y*G11a
(26375)1999 DE92:55.15.21461±46.1/45.3  0.069±0.016/0.012 V TS08a
4.7444  0.118±0.096/0.048 V TM13a
(28978) Ixion2001 KX76PLU3.33.2<804  >0.15 * TA04a
 <822  >0.148 R T*G05a
 475±75  0.375±0.125 V TS05a
4.04480±152/136  0.19±0.18/0.08 V TC06a
3.84650±260/220  0.12±0.14/0.06 V TS08a
3.2549  0.308±0.337/0.141 V TM13a
(29981)1999 TD10CEN8.7 90±15  0.075±0.025 V TS05a
9.188±16/15  0.053±0.025/0.015 V TC06a
8.93103.7±13.6/13.5  0.044±0.014/0.01 V TS08a
8.8103  0.051±0.044/0.023 V TM13a
(31824) Elatus1999 UG5CEN10.110.5230±8  0.1±0.04/0.03 V TS08a
10.157±15.9  0.05±0.028 TB13b
10.40±0.0949.8±10.4/9.8  0.049±0.028/0.016 V TD13a
10.145  0.079±0.127/0.043 V TM13a
(32532) Thereus2001 PT13CEN9.0 80±5  0.098±0.013 V TS05a
9.3287.8±9.5/9.4  0.043±0.011/0.008 V TS08a
9.086.5±1.9  0.059±0.013 TB13b
9.40±0.1662±3  0.083±0.016/0.013 V TD13a
9.066  0.103±0.081/0.042 V TM13a
(32929)1995 QY9PLU8.07.566  0.400±0.853/0.231 V TM13a
(33128)1998 BU48CEN7.27.2213  0.052±0.065/0.028 V TM13a
(33340)1998 VG44PLU6.56.5398  0.028±0.024/0.013 V TM13a
(35671)1998 SN165TNO5.65.72460±60/80  0.043±0.018/0.012 V TS08a
5.707±0.085393±49/48  0.060±0.019/0.013 V TV14a
5.8446  0.043±0.035/0.021 V TM13a
(38628) Huya2000 EB173PLU**4.94.7<540  >0.08 * TA04a
 <548  >0.084 R T*G05a
 480±50  0.11±0.02 V TS05a
5.1500±75/69  0.066±0.023/0.016 V TC06a
5.23532.6±25.1/24.4  0.05±0.005/0.004 V TS08a
4.9384&plumsn;98/134  0.10±0.13/0.04 TS12e
5.14±0.07438.7±26.5/25.2  0.081±0.011 V TM12a
5.04±0.03458.0±9.2  0.083±0.004 TF13b
(40314)1999 KR16TNO5.85.37±0.08254±37  0.204±0.07/0.05 V TS12a
(42355) Typhon2002 CR46CEN**7.5 155±15  0.1±0.02 V TS05a
7.65±0.01A 172.8±15.6/18152±28/3284±16/18A 0.051±0.012/0.008 *0.44±0.44/0.17T (Y)G08a
7.65175±17/20  0.051±0.013/0.009 V TS08a
7.68±0.04144±10  0.075±0.01 V0.66±0.09/0.08T (Y)M10b
 [127.8]112±26[61.5]0.09±0.04 VA 1±1/0.5Y*G11a
7.72±0.04185±7162±789±60.044±0.003 V0.36±0.08/0.07T (Y)S12a
7.715±0.035157±34137±3077±160.06±0.041/0.021 V0.6±0.72/0.29T (Y)S12d
7.5192±50  0.05±0.03 TB13b
(44594)1999 OX3CEN7.37.1151  0.111±0.119/0.062 V TM13a
(47171)1999 TC36PLU***4.94.9609±93/47  0.05±0.01 * TA04a
 [313.6]294[109]0.23 *A 1YM04a
  301±68 0.22±0.01 RA 1±1/0.5Y*G05a
 375±50  0.15±0.04 V0.675±0.125T (Y)S05a
5.37405±65/553791330.079±0.031/0.021 V0.5±0.4/0.2T (Y)S06c
5.39414.6±38.8/38.2  0.072±0.015/0.012 V TS08a
 A 414.6±38.8/38.2286±45/38265±41/35A 0.070.542±0.317/0.211(Y)B10a
 A 414.6±38.8/38.2 139±22/18A 0.070.542±0.317/0.211(Y)B10a
5.41±0.1393.1±25.2/26.8272±17/19251±16/170.079±0.013/0.011 V0.64±0.15/0.11T (Y)M12a
5.41±0.1393.1±25.2/26.8 132±8/90.079±0.013/0.011 V0.64±0.15/0.11T (Y)M12a
(47932)2000 GN171PLU6.0     0.65±0.09(H)D08a
6.2321±57.4/54.2  0.057±0.025/0.016 V TS08a
6.45±0.34147.1±20.7/17.8  0.215±0.093/0.07 V TM12a
(48639)1995 TL8SDO**5.45.3194  0.369±0.237/0.142 V TM13a
(50000) Quaoar2002 LM60CUB**2.4  1260±190 0.092±0.036/0.023 R IB04a
2.74844±207/190  0.199±0.132/0.07 V TS08a
2.739±0.011908±112/118  0.172±0.055/0.036 V TB09a
2.739±0.011830±178/142  0.206±0.093/0.066 V T*B09a
 [893.1]A 890±70[74.2] 4.2±1.3TI* (Y)F10a
  1170 0.11 OB11a
 A 890±70   3.85±1.15(Y)F13a
2.73±0.061073.6±37.91070±3881±110.127±0.010/0.0092.18±0.43/0.36TF13b
2.82±0.06 1128±48/34 0.109±0.007 V1.99±0.46OB13c
  >1138±25 0.14±0.10<1.82±0.28OD13b
  <1160±240   OF13c
2.5910  0.219±0.216/0.089 V TM13a
(52872) Okyrhoe1998 SG35CEN10.9 45±5  0.03±0.005 V TS05a
11.0452.1±6.9  0.025±0.008/0.006 V TS08a
11.036±1.2  0.058±0.02 TB13b
11.07±0.1035±3  0.056±0.012/0.010 V TD13a
10.852  0.032±0.022/0.012 V TM13a
(52975) Cyllarus1998 TF35CEN9.49.0162±20/18  0.115±0.09/0.05 V TS08a
9.02±0.1556±21/18  0.139±0.157/0.064 V TD13a
9.355  0.107±0.148/0.071 V TM13a
(54598) Bienor2000 QC243CEN7.5 175±25  0.055±0.015 V TS05a
7.7206.7±30.1  0.034±0.013/0.008 V TS08a
7.5187.5±15.5  0.05±0.019 TB13b
7.57±0.34198±6/7  0.043±0.016/0.012 V TD13a
7.6201  0.041±0.029/0.017 V TM13a
(55565)2002 AW197CUB3.4 886±115/131  0.101±0.038/0.022 R TM02a
3.27700±50  0.17±0.03 * TC05a
 700±50  0.17±0.03 V TS05a
3.62734±123/135  0.12±0.06/0.032 V TC06a
3.61734.6±116.4/108.3  0.118±0.044/0.03 V TS08a
 742±98/104  0.115±0.041/0.025 V T*B09a
3.568±0.046768±39/48  0.112±0.012/0.011 V TV14a
3.3686  0.186±0.163/0.085 V TM13a
(55576) Amycus2002 GB10CEN7.88.0776.3±12.5  0.18±0.078/0.047 V TS08a
7.46100.9±40.1  0.18±0.135 TB13b
8.27±0.11104±8  0.083±0.016/0.015 V TD13a
7.5122  0.123±0.110/0.057 V TM13a
(55636)2002 TX300HAU3.2 <907  >0.084 V TO04a
 <709  >0.19 R T*G05a
3.49<800  >0.1 V TS08a
 <420  >0.41 V T*B09a
 286±10  0.88±0.15/0.06 V OE10a
(55637)2002 UX25CUB**3.73.8681.2±115.6/114  0.115±0.051/0.031 V TS08a
 680±106/108  0.111±0.049/0.03 V T*B09a
3.87±0.02697.2±23.0/24.5  0.107±0.005/0.008 TF13b
 A 692±23664190A 0.107±0.005/0.008 V0.82±0.11T* (Y)B14d
3.87±0.02A 697±35670±34193±10A 0.107±0.01 V T*V14a
3.6705  0.129±0.119/0.059 V TM13a
(55638)2002 VE95PLU5.65.70±0.06249.8±13.5/13.1  0.149±0.019/0.016 V TM12a
(58534) Logos1997 CQ29CUB**6.7 [109.3]84[70]0.41 *A 1YM04a
 [103.7]80660.37 RA 1YN04b
  77±18 0.39±0.17 RA 1±1/0.5Y*G05a
 [105.7]82±18[66.7]0.195±0.085 VA 1±1/0.5YG11a
  82.2±0.4 0.28±0.02 RA 1Y*P11a
(60558) Echeclus2000 EC98CEN9.4 70±15  0.125±0.045 V TS05a
9.5583.6±15/15.2  0.038±0.019/0.011 V TS08a
9.5559±4  0.077±0.015 TB13b
9.78±0.1464±2  0.054±0.007/0.006 V TD13a
9.487  0.042±0.049/0.021 V TM13a
(60608)2000 EE173CEN8.68.5117  0.054±0.054/0.024 V TM13a
(63252)2001 BL41CEN11.711.4735±7/8  0.039±0.025/0.013 V TS08a
11.34±0.2134.6±6.1/6.6  0.043±0.028/0.014 V TD13a
11.535  0.037±0.032/0.018 V TM13a
(65489) Ceto2003 FX128CEN**6.46.614±0.021218±20/22174±16/18132±12/140.084±0.021/0.014 *1.37±0.66/0.32T (Y)G07a
     2.3±0.31(H)D08a
6.6229.7±18.6/18.2  0.077±0.014/0.011 V TS08a
 [238.0]189±43[144.7]0.09±0.04 VA 1±1/0.5Y*G11a
6.54±0.06281±11223±10171±100.056±0.006 V0.64±0.16/0.13T (Y)S12a
(66652) Borasisi1999 RZ253CUB**5.9 [215.2]1661370.12±0.01 BA 1YN04a
  170±39 0.29±0.12 RA 1±1/0.5Y*G05a
 [206.2]160±36[130.1]0.175±0.075 VA 1±1/0.5YG11a
  163.2±0.4 0.192±0.009 RA 1Y*P11a
6.121±0.070163±32/66126±25/51103±20/420.236±0.438/0.077 V2.1±2.6/1.2T (Y)V14a
5.9153  0.343±0.358/0.175 V TM13a
(73480)2002 PN34CEN8.68.66119.5±10.3/10.2  0.043±0.008/0.007 V TS08a
8.66±0.03112±7  0.049±0.006 V TS12a
(78799)2002 XW93CEN5.55.4±0.7565±71/73  0.038±0.043/0.025 V TV12a
(79360) Sila-Nunam1997 CS29CUB**5.35.65±0.09335±85  0.1±0.04 V TM10b
 A 343±41/42250±30236±280.086±0.026/0.017 V0.72±0.37/0.22T (Y)G12a
5.56±0.04343±42[249.1][235.7]0.09±0.027/0.017 V0.73±0.28T (Y)V12a
5.56±0.04343±42249±30/31236±28/290.090±0.027/0.017 V0.73±0.28T* (Y)V14a
(82075)2000 YW1343:8**4.84.88±0.05<500  >0.08 V TM10b
4.8229  0.408±0.329/0.213 V TM13a
(82158)2001 FP185SDO6.06.39±0.07332±31/24  0.046±0.007 V TS12a
(83982) Crantor2002 GO9CEN8.89.1660±15/13  0.11±0.07/0.04 V TS08a
9.03±0.1659±11/12  0.121±0.064/0.038 V TD13a
8.551  0.276±0.478/0.135 V TM13a
(84522)2002 TC3022:53.83.7<1195  >0.04 * TA04a
 <1211  >0.051 R T*G05a
4.11150±337/325  0.031±0.029/0.012 V TS08a
4.17±0.10584.1±105.6/88.0  0.115±0.047/0.033 TF13b
3.91164  0.037±0.028/0.015 V TM13a
(84719)2002 VR128PLU5.75.58±0.37448.5±42.1/43.2  0.052±0.027/0.018 V TM12a
(84922)2003 VS2PLU4.14.4725.2±199/187.6  0.058±0.048/0.022 V TS08a
4.11±0.38523±35.1/34.4  0.147±0.063/0.043 V TM12a
(86177)1999 RY215TNO7.17.235±0.093263±29/37  0.032±0.012/0.007 V TV14a
(87555)2000 QB243CEN8.38.392  0.104±0.114/0.051 V TM13a
(88611) Teharonhiawako2001 QT297CUB**5.8 [214.1]176±20122±140.115±0.025A 1.5±0.5YO03a
  168±38 0.1±0.04 RA 1±1/0.5Y*G05a
 [181.5]147±33[106.5]0.275±0.115 VA 1±1/0.5YG11a
  152±0.6 0.147±0.003 RA 1Y*P11a
6.00±0.13177±46/44[143.3][103.8]0.22±0.14/0.08 V1.14±0.87/0.91T (Y)V12a
6.00±0.13220±41/44178±33/36129±24/260.145±0.086/0.045 V0.60±0.36/0.33T* (Y)V14a
(90377) Sedna2003 VB12SDO1.5 <1800  >0.046 R I*G05a
1.8<1600  >0.16 V TS08a
1.83±0.05995±80  0.32±0.06 V TP12a
(90482) Orcus2004 DWPLU**2.22.5946.3±74.1/72.3  0.197±0.034/0.028 V TS08a
2.17±0.05940±709002800.28±0.04 *1.5±0.3T (Y)B10b
2.43±0.07850±90  0.27±0.07/0.05 V TL10b
 A 850±90807±100267±100A 0.272.25±0.885(Y)C11a
 [1086.0]1040±240[312.6]0.18±0.08 VA 1±1/0.5Y*G11a
2.31±0.03958.4±22.9917±25276±170.231±0.018/0.0111.53±0.15/0.13TF13b
2.3936  0.243±0.283/0.110 V TM13a
(90568)2004 GV9CUB4.0     1.315±0.175(H)D08a
4.2677.2±71.3/69.3  0.081±0.019/0.015 V TS08a
 684±68/78  0.073±0.049/0.029 V T*B09a
4.23±0.1680±34  0.077±0.008 V TV12a
(95626)2002 GZ32CEN6.9     1.34±0.18(H)D08a
7.0230.5±87.5  0.053±0.03 TB13b
7.37±0.10237±8  0.037±0.04 V TD13a
7.0220  0.059±0.036/0.022 V TM13a
(119315)2001 SQ73CEN9.69.15±0.1190±23/20  0.048±0.030/0.018 V TD13a
9.689  0.032±0.034/0.016 V TM13a
(119951)2002 KX14TNO4.44.6<561.6±219.9/181.5  >0.081±0.096/0.039 V TS08a
4.89±0.03<440  >0.1 V T*B09a
4.89±0.03180±50/38  0.6±0.36/0.23 V TB09a
4.86±0.1455±27  0.097±0.014/0.013 V TV12a
(119976)2002 VR130CEN11.011.26±0.3924.4±5.4/4.6  0.093±0.066/0.036 V TD13a
10.925  0.126±0.103/0.056 V TM13a
(120061)2003 CO1CEN8.99.2976.9±8.5/8.4  0.057±0.015/0.011 V TS08a
8.982±8.4  0.072±0.032 TB13b
9.07±0.0594±5  0.049±0.005/0.006 V TD13a
8.979  0.079±0.056/0.032 V TM13a
(120132)2003 FY128TNO4.95.09±0.09460±21  0.079±0.01 V TS12a
(120181)2003 UR292TNO7.37.4±0.4104±22/24  0.16±0.19/0.08 V TV12a
7.4±0.4136±16/26  0.105±0.081/0.033 V T*V14a
(120216)2004 EW95PLU6.76.69±0.35291.1±20.3/25.9  0.044±0.021/0.015 V TM12a
(120347) Salacia2004 SB60CUB**4.2 [983.4]930±210[319.5]0.02±0.01 VA 1±1/0.5Y*G11a
4.36±0.011954±109905±103303±350.036±0.01/0.007 V1.16±0.59/0.36T (Y)S12d
4.24±0.04901±45[852.1][292.8]0.044±0.004 V1.38±0.27T (Y)V12a
4.25±0.05901.0±45.0854±45286±240.044±0.0041.29±0.29/0.23TF13b
4.2953  0.040±0.024/0.016 V TM13a
(120348)2004 TY364TNO4.54.3365  0.264±0.338/0.111 V TM13a
(123509)2000 WK183CUB**6.6 [146.3]106±24[100.8]0.18±0.08 VA 1±1/0.5YG11a
(126154)2001 YH1403:55.45.8±0.2345±45  0.08±0.02 V TM10b
5.5350  0.091±0.110/0.048 V TM13a
(127546)2002 XU93CEN8.08.11±0.1164±9  0.038±0.004 V TS12a
7.9170±50  0.04±0.062 TB13b
(134340) Pluto PLU*****-0.8  2300±200 0.6±0.1 *1.6±0.2E (Y)D86a
-0.65 2360 0.47 TMA87a
-0.77 2200±140 0.63±0.1 *2.1±0.5E (Y)R87a
  2245.4±40 0.505±0.007 B1.991±0.018E (Y)T87a
  2302±12 0.525±0.085 B2.029±0.032E (Y)T90a
  <2362  >1.88O (Y)E91a
  2412±22  1.77±0.33O (Y)E91a
  2390±10  >1.9O (Y)M93a
  <2360±10  1.9O (Y)M93a
  2320±23 0.6 V IA94a
-0.648±0.01 2274±14 0.618±0.02 V ER94a
  2328±45.8   EY94a
  <2408   OA96a
    0.575±0.085 * IB97a
  <2390  >1.83O (Y)E03a
  <2430   OS03a
  2200±90 0.72±0.12 R M*G05a
  2350±50  1.92±0.12A (Y)P06a
  2304±64   OE07a
  2322   M*Y07a
  <2396   OY08a
  >2341±3   OL09a
  2360±40/20   OZ11a
  2346±20/40   OZ11b
  [2405±105]   IH12a
-0.67±0.342119.9±164.5/182.2  0.73±0.162/0.153 V TM12a
  <2410±4   OP13a
  2368   OL14b
  A 2362±24  1.89±0.06(Y)B14a
(134340) I = Charon SAT[0.9]   1500±1000.3±0.1 *1.6±0.2E (Y)D86a
   14940.26 TMA87a
0.89  1160±1000.49±0.1 *2.1±0.5E (Y)R87a
   1199.4±400.367±0.006 B1.991±0.018E (Y)T87a
   1186±260.378±0.015 B2.029±0.032E (Y)T90a
   1285±260.285±0.015 V IA94a
1.35±0.01  1168±100.372±0.012 V ER94a
   1242±41.2  EY94a
    0.375±0.015 * IB97a
   1260±900.37±0.02 R M*G05a
   1212±16 1.72±0.15O (Y)G06a
   1212±3 1.63±0.07O (Y)P06a
   1207.2±2.8 1.71±0.08O (Y)S06a
   [1254±158]  IH12a
   1204.8±3.2  OS12c
   A 1207.2±2.8 1.72±0.02(Y)B14a
(134340) II = Nix SAT    880.08A 1.63YT08a
   <45.7>0.3A 1YY12a
   93±470.09±0.26/0.05<1.68Y (Y)B14a
(134340) III = Hydra SAT    720.18A 1.63YT08a
   <55.6>0.3A 1YY12a
   115±570.09±0.26/0.05<0.88Y (Y)B14a
(134340) IV = Kerberos SAT    29±150.09±0.26/0.05 YB14a
(134340) V = Styx SAT    18±100.09±0.26/0.05 YB14a
(134860)2000 OJ67CUB**6.16.471±0.01[175.3]138±32[108.1±25.3]0.16±0.07 *A 1±1/0.5YG09a
 [174.4]138±32[106.6]0.16±0.07 VA 1±1/0.5Y*G11a
(135182)2001 QT322TNO6.26.4±0.5<160  >0.21 V TB09a
7.29±0.67159±30/47  0.085±0.424/0.052 V TV14a
5.9165  0.294±0.206/0.137 V TM13a
(136108) Haumea2003 EL61HAU***0.10.444±0.021 [1379±57] 0.663±0.063 V2.97±0.37Y (H)R06a
     2.551±0.115/0.01(H)L07a
0.51150±250/100  0.84±0.1/0.2 V TS08a
   320[0.79] VA 1YR09a
   160[0.82] VA 1YR09a
0.425 1324±167 0.698±0.189 V TL10a
0.425 [1438] 0.725 V2.57T (H)L10a
0.43±0.011239.5±68.7/57.8  0.804±0.062/0.095 TF13b
  1430 0.622.6T (H)L14a
0.021345  0.959±0.218/0.347 V TM13a
(136199) Eris2003 UB313SDO**-1.2-1.163000±400  0.6±0.15 R TB06a
-1.12±0.01 2400±100 0.86±0.07 V IB06b
-1.12±0.01 A 2400±100 A 0.86±0.07 V2.3±0.3(Y)B07a
-1.12600±400/200  0.7±0.15/0.2 V TS08a
  <2320   OM10a
 [3263.4]3260±740[149.0]0.55±0.24 VA 1±1/0.5Y*G11a
-1.15±0.075 2326±12 0.96±0.09/0.04 V2.52±0.05O (Y)S11a
-1.12±0.032454±1172434±117316±230.845±0.088 V2.23±0.41/0.33T (Y)S12a
-1.12±0.032454±1172356±117685±50 2.4±0.46/0.37T (Y)S12a
(136204)2003 WL7CEN8.68.6118±32.8  0.046±0.029 TB13b
8.75±0.16105±6/7  0.053±0.010 V TD13a
8.7101  0.057±0.036/0.020 V TM13a
(136472) Makemake2005 FY9CUB-0.401500±400/200  0.8±0.1/0.2 V TS08a
0.14±0.051420±60  [0.802±0.075] V TL10b
 [1465.6±20]  0.77±0.031.7±0.3O (Y)O12a
 1430±14  0.8±0.01 OB13a
-0.42148  0.573±0.531/0.188 V TM13a
(138537)2000 OK67CUB5.96.5±0.1<160  >0.16 V TB09a
6.47±0.13151±31/37  0.20±0.21/0.08 V TV12a
6.47±0.13164±33/45  0.169±0.159/0.052 V T*V14a
(139775)2001 QG298PLU**7.2     0.59±0.143/0.047(H)L07a
(144897)2004 UX10PLU4.5     0.785±0.105(H)P09a
4.75±0.16398.1±32.6/39.3  0.141±0.044/0.031 V TM12a
(145451)2005 RM43SDO4.4     0.555±0.075(H)P09a
(145452)2005 RN43CUB3.93.89±0.05679±55/73  0.107±0.029/0.018 V TV12a
(145453)2005 RR43HAU4.0     1.745±0.235(H)P09a
(145480)2005 TB190SDO4.74.58±0.22372.5±37.5  0.195±0.045 V TM10b
4.4±0.11464±62  0.148±0.051/0.036 V TS12a
(145486)2005 UJ438CEN10.810.520.8±7.2  0.215±0.123 TB13b
11.14±0.3216±1/2  0.256±0.097/0.076 V TD13a
10.830  0.094±0.071/0.039 V TM13a
(148780) Altjira2001 UQ18CUB**5.76.55±0.21<200  >0.1 V TB09a
 [220.6]164±36[147.5]0.1±0.04 VA 1±1/0.5YG11a
6.44±0.14257±90/92[191.1][171.9]0.071±0.049/0.021 V0.63±0.68/0.63T (Y)V12a
6.44±0.14331±51/187246±38/139221±34/1250.043±0.182/0.010 V0.30±0.50/0.14T* (Y)V14a
(148975)2001 XA255CEN11.111.237.7±10.5  0.041±0.014 TB13b
(174567) Varda2003 MW12TNO**3.43.61±0.05792±91/84705±81/75361±42/380.102±0.024/0.020 V1.27±0.41/0.44T (Y)V14a
(175113)2004 PF115TNO4.44.54±0.25468.2±38.6/49.1  0.123±0.043/0.033 V TM12a
(182934)2002 GJ32CUB5.46.12±0.13224±88/70  0.12±0.14/0.06 V TB09a
6.12±0.13416±81/78  0.035±0.019/0.011 V TV14a
(202421)2005 UQ513TNO3.43.87±0.14498±63/75  0.202±0.084/0.049 V TV14a
(208996)2003 AZ84PLU**3.73.71685.8±98.8/95.5  0.123±0.043/0.029 V TS08a
3.83±0.04910±60  0.07±0.02 V TM10b
  >573±21   OB11a
  >662±50   OB12a
3.74±0.08727±61.9/66.5  0.107±0.023/0.016 V TM12a
(225088)2007 OR103:102.01.96±0.161280±210  0.185±0.076/0.052 V TS12a
(229762)2007 UK126SDO**3.43.69±0.1599±77  0.167±0.058/0.038 V TS12a
(230965)2004 XA192TNO4.04.42±0.63339±120/95  0.26±0.34/0.15 V TV14a
(248835)2006 SX368CEN9.59.575±5  0.055±0.005 V TM10b
9.578.4±22.6  0.046±0.018 TB13b
9.45±0.1176±2  0.052±0.007/0.006 V TD13a
9.577  0.048±0.030/0.018 V TM13a
(250112)2002 KY14CEN9.59.538.9±3.5  0.185±0.046 TB13b
10.37±0.0747±3/4  0.057±0.011/0.007 V TD13a
(275809)2001 QY297CUB**5.6 [222.0]164±36[149.6]0.225±0.095 VA 1±1/0.5YG11a
5.86±0.31200±62/59[147.8][134.8]0.2±0.25/0.11 V1.4±1.2/1.3T (Y)V12a
5.86±0.31229±22/108169±16/80154±15/730.152±0.439/0.035 V0.92±1.30/0.27T* (Y)V14a
(281371)2008 FC76CEN9.19.158±4.2  0.12±0.027 TB13b
9.44±0.1068±6/7  0.067±0.017/0.011 V TD13a
(303775)2005 QU182SDO3.53.80±0.32416±73  0.328±0.16/0.109 V TS12a
(307251)2002 KW14CUB5.05.959±0.06<360  >0.05 V TB09a
5.88±0.11319±74/81  0.08±0.14/0.05 V TV12a
5.88±0.11161±35/40  0.310±0.281/0.094 V T*V14a
(307261)2002 MS4CUB3.74726.2±123.2/122.9  0.084±0.038/0.023 V TS08a
 730±118/120  0.073±0.058/0.032 V T*B09a
4.0±0.6934±47  0.051±0.036/0.022 V TV12a
(307463)2002 VU130PLU6.15.47±0.83252.9±33.6/31.3  0.179±0.202/0.103 V TM12a
(309139)2006 XQ51CEN9.89.839.1±15.7  0.139±0.058 TB13b
(309239)2007 RW10CEN6.66.39±0.61247±30  0.083±0.068/0.039 V TS12a
(309737)2008 SJ236CEN12.312.217.7±1.5  0.074±0.021 TB13b
(310071)2010 KR59CEN7.87.7110.1±30.8  0.121±0.037 TB13b
(328884)2010 LJ109CEN10.210.144.2±3.8  0.083±0.021 TB13b
(332685)2009 HH36CEN10.710.633±2.8  0.078±0.018 TB13b
(336756)2010 NV1CEN10.510.544.2±8.0  0.057±0.030 TB13b
(341520)2007 TY430PLU**6.86.94±0.02[141.4]1001000.23 VA 0.75YS12b
(342842)2008 YB3CEN9.39.567.1±1.0  0.062±0.012 TB13b
(346889) Rhiphonos2009 QV38CEN11.811.823.2±9.5  0.062±0.049 TB13b
(364171)2006 JZ81CUB**6.76.9[144.6]122±20/12[77.7±12.8/7.7]0.17±0.07/0.06 RA 1YP11a
(382004)2010 RM64CEN11.011.021±2  0.159±0.048 TB13b
(385266)2001 QB298CUB6.86.1196±71/53  0.167±0.162/0.082 V TM13a
(385437)2003 GH55CUB5.86.43±0.12178±21/56  0.150±0.182/0.031 V TV14a
(385446) Manwe2003 QW1114:7**6.5 [165.0]142±32[84.0]0.135±0.055 VA 1±1/0.5YG11a
7.15[185]160±24/4492±14/260.10±0.04A 0.75±0.25YG14b
 1996 TS66CUB6.66.48±0.16194±54/38  0.12±0.072/0.047 V TB09a
6.48±0.16159±44/46  0.179±0.173/0.070 V T*V14a
6.4163  0.180±0.238/0.088 V TM13a
 1998 WW31CUB**6.7 [192.4]1481230.054±0.005 RA 1YV02a
  152±35 0.06±0.026 RA 1±1/0.5Y*G05a
 [188.6]145±33[120.6]0.16±0.07 VA 1±1/0.5Y*G11a
  148±6 0.054±0.004 RA 1Y*P11a
 1999 OJ4TNO**7.17.344±0.012[104]75±17[72±16.3]0.215±0.095 *A 1±1/0.5YG09a
 [103.9]75±17[72.0]0.225±0.095 VA 1±1/0.5Y*G11a
 2000 CF105CUB**7.17.7[78.3]63.6±1.2/1.6[45.7±1.4/1.5]0.3±0.04/0.03 RA 1YP11a
 2000 GM137CEN14.314.36±0.388.6±1.5  0.043±0.026/0.016 V TD13a
14.39  0.046±0.039/0.018 V TM13a
 2000 QL2511:2**6.67.148±0.016[205.9]148±34[143.1±33]0.07±0.03 *A 1±1/0.5YG09a
 [206.5]150±34[141.9]0.07±0.03 VA 1±1/0.5Y*G11a
 2001 KA77CUB5.05.608±0.042634±134/92  0.025±0.01/0.008 V TB09a
5.64±0.12310±170/60  0.099±0.052/0.056 V TV12a
 2001 KD77PLU5.86.42±0.08232.3±40.5/39.4  0.089±0.044/0.027 V TM12a
 2001 QC298CUB**6.3 [304.6]234[195]0.076 *A 1YM04a
  244±55 0.025±0.011 RA 1±1/0.5Y*G05a
 [313.7]243±57[198.4]0.05±0.02 VA 1±1/0.5Y*G11a
6.26±0.32303±29/32235±21/23192±17/190.063±0.029/0.018 V T (Y)V14a
6.1299  0.070±0.049/0.025 V TM13a
 2001 QD298CUB5.76.68±0.08146±54/42  0.18±0.17/0.08 V TB09a
6.71±0.17233±27/63  0.067±0.062/0.014 V TV14a
5.6246  0.164±0.150/0.086 V TM13a
 2001 QF298PLU5.15.43±0.07408.2±40.2/44.9  0.071±0.02/0.014 V TM12a
 2001 QR322NL48.28.11±0.02132±24  0.058±0.029/0.016 V TB09a
7.7180  0.047±0.040/0.022 V TM13a
 2001 QS322CUB6.46.22±0.5<200  >0.15 V TB09a
6.91±0.68186±99/24  0.095±0.531/0.060 V TV14a
 2001 QW322CUB**7.8 [152.7]108108A 0.16 R1±0.2YM (M)P08a
7.51[179.8]128±2/4[126.2±2.6/4.9]0.093±0.01/0.006 RA 1YP11a
 2001 RZ143CUB**6.46.23±0.5<160  >0.23 V TB09a
6.69±0.13140±39/33  0.191±0.066/0.045 V TV12a
 2001 XR254CUB**5.76.03±0.017[219.2]169±39[139.6±32.5]0.155±0.065 *A 1±1/0.5YG09a
 [218.6]169±39[138.6]0.16±0.07 VA 1±1/0.5Y*G11a
6.05±0.15200±49/63[154.6][126.8]0.17±0.19/0.05 V1.4±1.3/1T (Y)V12a
6.05±0.15221±41/71171±32/55140±26/450.136±0.168/0.044 V1.00±0.96/0.56T* (Y)V14a
 2002 GH32TNO5.56.58±0.28<230  >0.075 V TV14a
 2002 GV31CUB6.06.1±0.6<130  >0.22 V TV12a
6.1±0.6<180  >0.19 V T*V14a
 2002 VT130CUB**5.85.95±0.5<240  >0.13 V TB09a
 324±57/68  0.097±0.098/0.049 V TM13a
 2002 XV93PLU5.05.42±0.46549.2±21.7/23  0.04±0.02/0.015 V TM12a
 2003 QA91CUB**5.55.76±0.63260±30/36  0.130±0.119/0.075 V TV14a
5.5289  0.134±0.104/0.059 V TM13a
 2003 QR91CUB**6.56.55±0.56280±27/30  0.054±0.035/0.028 V TV14a
6.5277  0.058±0.039/0.024 V TM13a
 2003 QX111PLU6.86.76±0.5434±132/86  0.018±0.017/0.009 V TB09a
6.6283  0.051±0.048/0.022 V TM13a
 2003 QY90CUB**6.4 [113.8]81±19[79.9]0.31±0.13 VA 1±1/0.5YG11a
 2003 SQ317 6.1     1.765±0.905HL13a
 2003 TJ58CUB**8.07.448±0.024[82.7]65±15[51.2±11.8]0.285±0.125 *A 1±1/0.5YG09a
 [82.9]65±15[51.4]0.295±0.125 VA 1±1/0.5Y*G11a
 2003 UN284CUB**7.57.5[149]124±6/10[82.7±4.6/7]0.09±0.03/0.01 RA 1YP11a
 2003 UT292PLU6.96.85±0.68185.6±17.9/18  0.067±0.068/0.034 V TM12a
 2003 UZ413PLU4.2     2.645±0.355(H)P09a
 2003 WU188CUB**5.75.96±0.64<220  >0.15 V TV14a
 2004 NT33TNO4.44.74±0.11423±87/80  0.125±0.069/0.039 V TV14a
 2004 PB108CUB**6.67.083±0.016[274.4]241±55[131.2±30]0.035±0.015 *A 1±1/0.5YG09a
 [276.7]243±57[132.3]0.035±0.015 VA 1±1/0.5Y*G11a
 2004 PT107TNO6.06.33±0.11400±45/51  0.032±0.011/0.007 V TV14a
 2004 QQ26CEN9.59.53±0.3679±19  0.044±0.039/0.014 V TD13a
9.579  0.045±0.049/0.021 V TM13a
 2005 EB299CEN8.38.3101  0.083±0.089/0.045 V TM13a
 2005 EF298CUB**6.16.4±0.5174±27/32  0.16±0.13/0.07 V TV12a
 2005 EO304CUB**6.36.59[171.3]152.4±2/1.8[78.2±1.5/1.4]0.15±0.01/0.01 RA 1YP11a
 2005 RO43CEN7.37.34±0.51194±10  0.056±0.036/0.021 V TD13a
7.3220  0.044±0.060/0.026 V TM13a
 2005 VJ119SDO10.610.628.5±6.9  0.126±0.06 TB13b
 2006 BR284CUB**6.97.3[114.7]89.8±0.8/1[71.3±1.5/1.5]0.22±0.01/0.01 RA 1YP11a
 2006 CH69CUB**6.57[129.1]100±12/10[81.7±10/8.4]0.23±0.09/0.06 RA 1YP11a
 2006 HJ123PLU5.75.32±0.66216.4±29.7/34.2  0.281±0.259/0.152 V TM12a
 2007 OC10SDO5.75.43±0.1309±37  0.127±0.04/0.028 V TS12a
 2007 VH305CEN11.5 23.8±8  0.07±0.036 TB13b
 2008 HY21CEN12.112.114.5±1.8  0.044±0.019 TB13b
 2010 BK118CEN10.210.246.4±1.8  0.068±0.013 TB13b
 2010 BL4CEN12.011.915.7±3.2  0.114±0.052 TB13b
 2010 EK1392:73.83.8±0.1470±35/10  0.25±0.02/0.05 V TP12a
 2010 ES65CEN11.811.826.9±7.9  0.049±0.024 TB13b
 2010 FH92CEN11.411.728±0.6  0.047±0.007 TB13b
 2010 GW147CEN13.213.215.9±0.7  0.037±0.006 TB13b
 2010 THCEN9.29.269.9±24.2  0.078±0.033 TB13b
 2010 WG9SDO8.18.1112.7±61.9  0.074±0.08 TB13b
 2011 MM4CEN9.39.363.7±6.2  0.083±0.024 TB13b
 2012 DR30CEN7.17.04±0.35188.0±9.4  0.076±0.031/0.025 V TK13a

Sources:


© 2002-2013, 2014 by Wm. Robert Johnston.
Last modified 22 June 2014.
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