Asteroids with Satellites Database--Johnston's Archive
2000 QL251
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, 1:2 resonance
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
47.7375 AU
| |
orbital period P: |
329.83 yr
(= 120472.6 d)
| |
eccentricity e: |
0.217899
| |
perihelion distance q: |
37.3356 AU
| |
aphelion distance Q: |
58.1395 AU
| |
inclination i: |
3.6849°
| |
argument of perihelion ω: |
98.4661°
| |
ascending node Ω: |
223.2326°
| |
mean anomaly M: |
38.2013°
| |
perihelion passage TP: |
1984 Apr 26.1
| |
Epoch: |
2019 Apr 27
| |
data arc: |
2000-2008
(52 obs.)
| |
Earth MOID: |
36.3243 AU
| |
Jupiter Tisserand invariant TJ: |
6.009
|
| Neptune Tisserand invariant TN: | 3.084 [*D] |
orbital data, secondary:
|
semimajor axis as: |
4992
± 16 km
[G19b]
| |
separation/primary radius as/rp: | 67 [*D] | |
separation/Hill radius as/rH: | 0.011 [*D] | |
orbital period Ps: |
56.4495
± 0.0039
d [G19b]
| |
eccentricity es: |
0.4893
± 0.004
[G19b]
| |
inclination is: | 127.69° ± 0.57° [G19b] | |
ascending node Ωs: | 109.24° ± 0.81° [G19b] | |
argument of pericenter ωs: | 151.66° ± 0.94° [G19b] | |
mean anomaly M: | 145.6° ± 1° [G19b] | |
Epoch: | 2007 Apr 09.5 | |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
6.8
[MPC]
7.148 ± 0.016 [G09a]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
206
km [*D]
| |
geometric albedo: |
0.07
± 0.03/0.03
[G09a]
| |
color index U-B: |
?
| |
color index B-V: |
0.87
[S12f]
| |
color index V-R: | 0.49 ± 0.03 [S12f] | |
color index B-R: | 1.36 ± 0.04 [S12f] | |
color index V-I: | 0.97 [S12f] | |
taxonomic type: |
?
| |
mass m: |
3.09x1018
± 2.9x1016
kg [G19b]
| |
density ρ: |
(1
± 1/0.5
g/cm3) [*A]
| |
Hill radius rH: |
450000 km [*D]
|
other data, primary:
|
diameter dp: |
148
± 34
km [G09a]
| |
color index V-I: | 0.85 ± 0.09 [B08d] | |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
143
± 33
km [*D]
| |
diameter ratio ds/dp: |
0.967
± 0.021
[G09a]
| |
component mag. difference ΔM: |
0.073
± 0.048
[G09a]
| |
color index V-I: | 0.98± 0.12 [B08d] | |
rotation period RPs: |
?
| |
|
|
--
2000 QL251
--discovery and notes:
Primary discovered
2000 Aug 25
from
Cerro Tololo Observatory, La Serena, Chile
by
M. W. Buie.
Companion discovered
2006 Jul 25
by K. S. Noll, D. C. Stephens, W. M. Grundy, and H. F. Levison
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2006 Sep 12 [N06e].
--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, K. S., Stephens, D. C., Grundy, W. M., & Levison, H. F. 2006, International Astronomical Union Circular 2000 QL_251
- Romanishin, W., Tegler, S. C., & Marsden, B. G. 2001, Minor Planet Electronic Circulars 2000 QL251
- Wasserman, L. H., Buie, M. W., Kern, S. D., Millis, R. L., Elliot, J. L., & Marsden, B. G. 2001, Minor Planet Electronic Circulars Seven TNOs
©
2006-2014, 2019
by Wm. Robert Johnston.
Last modified
27 May 2019.
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