Asteroids with Satellites Database--Johnston's Archive
(6265)
1985 TW3
compiled by Wm. Robert Johnston
last updated
21 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:
main belt asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.165872171 AU
| |
orbital period P: |
3.187553141 yr
(= 1164.253785 d)
| |
eccentricity e: |
0.193058849
| |
perihelion distance q: |
1.74773138 AU
| |
aphelion distance Q: |
2.584012959 AU
| |
inclination i: |
4.1141742°
| |
argument of perihelion ω: |
281.197228°
| |
ascending node Ω: |
45.247716°
| |
mean anomaly M: |
32.572448°
| |
perihelion passage TP: |
2014 Feb 06.65945
| |
Epoch: |
2014 May 23
| |
data arc: |
1979-2013
(1248 obs.)
| |
Earth MOID: |
0.740908 AU
| |
Jupiter Tisserand invariant TJ: |
3.665
|
orbital data, secondary:
|
binary dynamical type: | A [M09a] | |
semimajor axis as: |
8
km
[*E]
| |
separation/primary radius as/rp: | 3.3 [*E] | |
separation/Hill radius as/rH: | 0.012 [*E] | |
orbital period Ps: |
0.6608
± 0.0004
d [H07b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.04
[M09a]
|
|
other data, system (combined):
|
absolute mag. H: |
13.4
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
4.95
± 0.1
km [M11b]
| |
geometric albedo: |
0.286
± 0.071
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
660 km [*E]
|
other data, primary:
|
diameter dp: |
4.81
± 0.1
km [*D]
| |
rotation period RPp: |
2.709
± 0.000
h [H07b]
| |
amplitude in mag., rotational ΔM: |
0.36
[W14e]
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.16
± 0.1
km [*D]
| |
diameter ratio ds/dp: |
0.24
± 0.02
[H07b]
| |
component mag. difference ΔM: |
3.1
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(6265) 1985 TW3
--discovery and notes:
Primary discovered
1985 Oct 11
from
Palomar Observatory, California, USA
by
T. F. Fric and R. J. Gilbrech.
Alternate designation(s):
1953 RK1, 1969 TZ4, 1979 YG9, 1985 VQ1, 1987 GD1, 1990 CX.
Linked to prediscovery observations from 1979 Dec 25.
Permanent number assigned 1995 Mar 17.
Companion discovered
2007 Jul 15
using
lightcurve
observations.
Announced
2007 Aug 02.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, David, Oey, Julian, & Pravec, Petr 2011, Minor Planet Bulletin Period Determination of Binary Asteroid Targets Observed at Hunters Hill Observatory: May-September 2009
- Higgins, D., Pravec, P., & Kusnirak, P. 2007, Central Bureau Electronic Telegrams (6265) 1985 TW3
©
2007-2008, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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