Asteroids with Satellites Database--Johnston's Archive
(229762)
G!kunll’homdima
and G!o’e!Hu
compiled by Wm. Robert Johnston
last updated
9 October 2021
--Orbital and physical data--
(See this page for definitions of quantities; source codes in brackets, see this link for full references; *A, *D, and *E indicate assumed, derived, and estimated values, respectively.)
dynamical type, primary:
TNO, scattered disk
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
72.7225 AU
| |
orbital period P: |
620.159 yr
(= 2468536.71 d)
| |
eccentricity e: |
0.484309
| |
perihelion distance q: |
37.50233 AU
| |
aphelion distance Q: |
107.9426 AU
| |
inclination i: |
23.377938°
| |
argument of perihelion ω: |
346.8759°
| |
ascending node Ω: |
131.09416°
| |
mean anomaly M: |
344.2086°
| |
perihelion passage TP: |
2046 Jul 10.21
| |
Epoch: |
2019 Apr 27
| |
data arc: |
1982-2013
(178 obs.)
| |
Earth MOID: |
36.5228 AU
| |
Jupiter Tisserand invariant TJ: |
6.076
|
| Neptune Tisserand invariant TN: | 2.911 [*D] |
orbital data, secondary:
|
semimajor axis as: |
6035
± 48 km
[G19a]
| |
separation/primary radius as/rp: | 19.7 [*D] | |
separation/Hill radius as/rH: | 0.0039 [*D] | |
orbital period Ps: |
11.31473
± 0.00016
d [G19a]
| |
eccentricity es: |
0.0236
± 0.0066
[G19a]
| |
inclination is: | 43.75° ± 0.38° [G19a] | |
ascending node Ωs: | 110.6° ± 1.5° [G19a] | |
argument of pericenter ωs: | 91° ± 18° [G19a] | |
mean anomaly M: | 344° ± 1.4° [G19a] | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
3.3
[MPC]
3.68 ± 0.03 [G12b]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
624
± 23
km [*D]
| |
geometric albedo: |
0.15
± 0.016
[S17a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
color index V-R: | 0.62 ± 0.05 [P10a] | |
color index V-I: | 1.09 ± 0.05 [P10a] | |
color index R-J: | 0.91 ± 0.08 [P10a] | |
color index V-J: | 1.53 ± 0.08 [P10a] | |
color index J-H: | 0.36 ± 0.11 [P10a] | |
color index V-H: | 1.89 ± 0.08 [P10a] | |
taxonomic type: |
?
| |
mass m: |
1.36x1020
± 3.3x1018
kg [G19a]
| |
density ρ: |
1.04
± 0.17
g/cm3[G19a]
| |
Hill radius rH: |
1600000 km [*E]
|
other data, primary:
|
diameter dp: |
614
± 15
km [S17a]
| |
color index V-I: | 1.03 ± 0.03 [G19a] | |
rotation period RPp: |
11.05
h [T14a]
| |
amplitude in mag., rotational ΔM: |
0.03
± 0.01
[T14a]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
112
± 76
km [S17a]
| |
diameter ratio ds/dp: |
0.182
± 0.124
[*D]
| |
component mag. difference ΔM: |
3.242
± 0.039
[G19a]
| |
color index V-I: | 1.8± 0.08 [G19a] | |
rotation period RPs: |
?
| |
|
|
--
(229762) G!kunll’homdima and G!o’e!Hu
--discovery and notes:
Primary discovered
2007 Oct 19
from
Palomar Observatory, California, USA
by
M. E. Schwamb, M. E. Brown, and D. Rabinowitz.
Alternate designation(s):
2007 UK126
.
Linked to prediscovery observations from 1982 Aug 16.
Permanent number assigned 2009 Dec 31.
Named 2019 Apr 06 for the Jul’hoan mythological character [MPC112434].
Companion discovered
2008 Nov 13
by W. M. Grundy, S. D. Benecchi, M. W. Buie, K. S. Noll, S. B. Porter, H. G. Roe, J. A. Stansberry, and C. A. Trujillo
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2011 Sep [G11b].
Permanent designation I G!o’e!Hu, assigned 2019 Apr 06; named for the mythological Jul’hoan horn [MPC112434].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2011-2019, 2021
by Wm. Robert Johnston.
Last modified
9 October 2021.
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