(88611) Teharonhiawako and Sawiskera

compiled by Wm. Robert Johnston
last updated 3 November 2012

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:
semimajor axis a: 43.9124789130208 AU
orbital period P: 290.9981 y (=106289 d)
eccentricity e: 0.030226546688497
perihelion distance q: 42.5851563189487 AU
aphelion distance Q: 45.23980151 AU
inclination i: 2.58253165896131°
argument of perihelion omega: 236.994201337021°
ascending node OMEGA: 304.745913611628°
mean anomaly M: 145.050151701466°
perihelion passage TP: 1888-05-18.1308344
Epoch: 18 AUG 2005
data arc: 2000-2005 (55 obs.)

orbital data, secondary:
semimajor axis a: 27,670 ± 120 km [G11b]
semimajor axis/primary radius a/Rp: (310?)
orbital period P: 828.76 ± 0.22 d [G11b]
eccentricity e: 0.2494 ± 0.0021 [G11b]
inclination i: 144.42° ± 0.35 ° [G11b]
ascending node : 54.22° ± 0.69 ° [G11b]
longitude of periapsis: 20.1° ± 1.0 ° [G11b]
mean longitude at epoch: 296.2° ± 1.1° [G11b]
Epoch: 31.5 MAR 2001 [G11b]

other data, primary:
diameter: (176 ± 20 km) [O03a]
absolute magnitude H: 5.57 [JPL]
rotation period: 4.7526 ± 0.0007 h or
9.505 ± 0.001 h [O03a]
amplitude delta M: ~0.6 [O03a]
color index B-V: 1.01 ± 0.04 [O03a]
color index V-R: 0.61 ± 0.04 [O03a]
color index R-I: 0.64 ± 0.03 [O03a]
slope parameter G: (0.15) [a]
geometric albedo: (0.09 to 0.14) [O03a]
0.13 [K05a]
mass (system): (2.445 ± 0.032) x 1018 kg [G11b]
density: (1.5 g/cm3) [O03a]
type: ?

other data, secondary:
diameter: (122 ± 14 km) [O03a]
diameter ratio Ds/Dp: 0.69 [O03a]
component magnitude difference: 0.8 [O03a]
rotation period: 4.7526 ± 0.0007 h or
9.5055 ± 0.0010 h [O03a] 5.50 ± 0.02 h [K06a]
color index B-V: 1.00 ± 0.08 [O03a]
color index V-R: 0.61 ± 0.07 [O03a]
color index R-I: 0.59 ± 0.06 [O03a]

--(88611) Teharonhiawako--discovery and notes:

Primary discovered 20 August 2001 from Cerro Tololo Observatory at La Serena, Chile, by the Lowell Deep Ecliptic Survey. Alternate designation 2001 QT297. Name assigned 2007.

Companion discovered from observations made 11-12 October 2001 by D. J. Osip and S. M. Burles at the Baade telescope at Las Campanas, Chile; announced 15 October 2001. Name assigned 2007.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2002-2007, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.