Asteroids with Satellites Database--Johnston's Archive
(524366)
2001 XR254
compiled by Wm. Robert Johnston
last updated
27 May 2019
--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, Cubewano
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
42.7866 AU
| |
orbital period P: |
279.873 yr
(= 102225.7 d)
| |
eccentricity e: |
0.037161
| |
perihelion distance q: |
41.1966 AU
| |
aphelion distance Q: |
44.3766 AU
| |
inclination i: |
1.230713°
| |
argument of perihelion ω: |
78.7861°
| |
ascending node Ω: |
180.05°
| |
mean anomaly M: |
226.0482°
| |
perihelion passage TP: |
2123 Jun 18.0
| |
Epoch: |
2019 Apr 27
| |
data arc: |
2001-2018
(112 obs.)
| |
Earth MOID: |
40.1814 AU
| |
Jupiter Tisserand invariant TJ: |
5.851
|
| Neptune Tisserand invariant TN: | 3.086 [*D] |
orbital data, secondary:
|
semimajor axis as: |
9311
± 52 km
[G19b]
| |
separation/primary radius as/rp: | 110 [*D] | |
separation/Hill radius as/rH: | 0.017 [*D] | |
orbital period Ps: |
125.579
± 0.048
d [G19b]
| |
eccentricity es: |
0.5561
± 0.0047
[G19b]
| |
inclination is: | 41.08° ± 0.22° [G19b] | |
ascending node Ωs: | 341.19° ± 0.29° [G19b] | |
argument of pericenter ωs: | 246.29° ± 0.93° [G19b] | |
mean anomaly M: | 151.97° ± 0.29° [G19b] | |
Epoch: | 2007 Jul 18.5 | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
5.9
[MPC]
6.05 ± 0.15 [V14a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
221
± 41/71
km [V14a]
| |
geometric albedo: |
0.136
± 0.168/0.044
[V14a]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
4.06x1018
± 4.8x1016
kg [G19b]
| |
density ρ: |
1
± 0.96/0.56
g/cm3[V14a]
| |
Hill radius rH: |
540000 km [*D]
|
other data, primary:
|
diameter dp: |
171
± 32/55
km [V14a]
| |
color index V-I: | 1.04 ± 0.11 [B08d] | |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
140
± 26/45
km [V14a]
| |
diameter ratio ds/dp: |
0.826
± 0.024
[G09a]
| |
component mag. difference ΔM: |
0.415
± 0.064
[G09a]
| |
color index V-I: | 1.06± 0.12 [B08d] | |
rotation period RPs: |
?
| |
|
|
--
(524366) 2001 XR254
--discovery and notes:
Primary discovered
2001 Dec 10
from
Mauna Kea Observatory, Hawaii, USA
by
D. C. Jewitt, S. S. Sheppard, and J. Kleyna.
Permanent number assigned 2019 May 18.
Companion discovered
2006 Dec 20
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2007 Mar 14.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Grundy, W. M., Noll, K. S., Buie, M. W., Benecchi, S. D., Stephens, D. C., & Levison, H. F. 2009, Icarus Mutual orbits and masses of six transneptunian binaries
- Noll, Keith S., Grundy, William M., Chiang, Eugene I., Margot, Jean-Luc, & Kern, Susan D. 2007, ArXiv Astrophysics e-prints Binaries in the Kuiper Belt
- Sheppard, S. S. & Marsden, B. G. 2002, Minor Planet Electronic Circulars 2001 XR254
©
2007-2015, 2019
by Wm. Robert Johnston.
Last modified
27 May 2019.
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