Asteroids with Satellites Database--Johnston's Archive
1999 XY143
compiled by Wm. Robert Johnston
last updated
20 September 2014
--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: |
43.224 AU
| |
orbital period P: |
284.181 yr
(= 103797.0 d)
| |
eccentricity e: |
0.07770
| |
perihelion distance q: |
39.866 AU
| |
aphelion distance Q: |
46.582 AU
| |
inclination i: |
7.15229°
| |
argument of perihelion ω: |
83.02°
| |
ascending node Ω: |
255.39896°
| |
mean anomaly M: |
108.28°
| |
perihelion passage TP: |
1928 Nov 29
| |
Epoch: |
2014 May 23
| |
data arc: |
1999-2008
(26 obs.)
| |
Earth MOID: |
38.8633 AU
| |
Jupiter Tisserand invariant TJ: |
5.823
|
| Neptune Tisserand invariant TN: | 3.07 [*D] |
orbital data, secondary:
|
semimajor axis as: |
2670
± 70 km
(separation)
[G12b]
| |
separation/primary radius as/rp: | 25 [*E] | |
separation/Hill radius as/rH: | 0.0040 [*E] | |
orbital period Ps: |
14
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
6
[MPC]
6.006 ± 0.565 [JPL]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
278
km [*E]
| |
geometric albedo: |
(0.09
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1
g/cm3) [*A]
| |
Hill radius rH: |
660000 km [*E]
|
other data, primary:
|
diameter dp: |
213
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
179
km [*E]
| |
diameter ratio ds/dp: |
0.839
[N09b]
| |
component mag. difference ΔM: |
0.38
[N09b]
| |
rotation period RPs: |
?
| |
|
|
--
1999 XY143
--discovery and notes:
Primary discovered
1999 Dec 14
from
Whipple Observatory, Mt. Hopkins, Arizona, USA
by
C. W. Hergenrother.
Companion discovered
2008 Sep 19
by K. S. Noll, W. M. Grundy, S. D. Benecchi, and H. A. Levison
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2009 Sep 24 [N09b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Noll, K. S., Grundy, W. M., Benecchi, S. D., & Levison, H. A. 2009, International Astronomical Union Circular 1999 XY_143, 1999 RY_214, and 2002 VT_130
©
2009, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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