Asteroids with Satellites Database--Johnston's Archive
2001 FL185
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: |
44.326 AU
| |
orbital period P: |
295.117 yr
(= 107791.7 d)
| |
eccentricity e: |
0.07955
| |
perihelion distance q: |
40.8000 AU
| |
aphelion distance Q: |
47.852 AU
| |
inclination i: |
3.560054°
| |
argument of perihelion ω: |
69.23°
| |
ascending node Ω: |
75.506°
| |
mean anomaly M: |
28.88°
| |
perihelion passage TP: |
1990 Sep 18
| |
Epoch: |
2014 May 23
| |
data arc: |
2001-2008
(35 obs.)
| |
Earth MOID: |
39.8143 AU
| |
Jupiter Tisserand invariant TJ: |
5.925
|
| Neptune Tisserand invariant TN: | 3.09 [*D] |
orbital data, secondary:
|
semimajor axis as: |
1900
± 400 km
(separation)
[N08c]
| |
separation/primary radius as/rp: | 27 [*E] | |
separation/Hill radius as/rH: | 0.0046 [*E] | |
orbital period Ps: |
17
d [*E]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
7.1
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
167
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: |
410000 km [*E]
|
other data, primary:
|
diameter dp: |
142
km [*E]
| |
rotation period RPp: |
?
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
88
km [*E]
| |
diameter ratio ds/dp: |
0.617
[G12b]
| |
component mag. difference ΔM: |
0.8
± 0.6
[N08c]
| |
rotation period RPs: |
?
| |
|
|
--
2001 FL185
--discovery and notes:
Primary discovered
2001 Mar 26
from
Kitt Peak Observatory, Arizona, USA
by
M. W. Buie.
Companion discovered
2006 Jan 24
using
Hubble Space Telescope
observations from Hubble Space Telescope.
Announced
2007 Mar 14.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- 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
- Grav, T. & Marsden, B. G. 2002, Minor Planet Electronic Circulars 2001 FL185
- 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
©
2007-2008, 2014
by Wm. Robert Johnston.
Last modified
20 September 2014.
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