Asteroids with Satellites Database--Johnston's Archive
(44620)
1999 RS43
compiled by Wm. Robert Johnston
last updated
29 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:
main belt asteroid
orbital data, primary (osculating elements)
[JPL]
: |
semimajor axis a: |
2.176320153 AU
| |
orbital period P: |
3.210585024 yr
(= 1172.688328 d)
| |
eccentricity e: |
0.164202154
| |
perihelion distance q: |
1.8189637 AU
| |
aphelion distance Q: |
2.53367661 AU
| |
inclination i: |
4.398687°
| |
argument of perihelion ω: |
180.916159°
| |
ascending node Ω: |
182.017649°
| |
mean anomaly M: |
285.380881°
| |
perihelion passage TP: |
2015 Aug 09.069359
| |
Epoch: |
2014 Dec 09
| |
data arc: |
1998-2015
(711 obs.)
| |
Earth MOID: |
0.816511 AU
| |
Jupiter Tisserand invariant TJ: |
3.663
|
orbital data, secondary:
|
semimajor axis as: |
2
km
[*D]
| |
separation/primary radius as/rp: | 6.2 [P15f] | |
separation/Hill radius as/rH: | 0.0059 [*E] | |
orbital period Ps: |
1.401
± 0.0004
d [W17a]
| |
eccentricity es: |
0
[P15f]
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
15.5
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
2.5
km [*E]
| |
geometric albedo: |
(0.16
) [*A]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
340 km [*E]
|
other data, primary:
|
diameter dp: |
2.37
km [*E]
| |
rotation period RPp: |
2.9
± 0.5
h [P15f]
| |
amplitude in mag., rotational ΔM: |
?
| |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.81
km [*E]
| |
diameter ratio ds/dp: |
0.34
± 0.02
[W17a]
| |
component mag. difference ΔM: |
2.34
± 0.13
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(44620) 1999 RS43
--discovery and notes:
Primary discovered
1999 Sep 12
from
Višnjan, Croatia
by
K. Korlevic.
Alternate designation(s):
1999 HX81.
Linked to prediscovery observations from 1998 Apr 21.
Permanent number assigned 2002 Aug 22.
Companion discovered
2014
by Pravec, P., P. Scheirich, P. Kusnirak, K. Hornoch, and A. Galad
using
lightcurve
observations.
Announced
2015 Aug 05 [P15f].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2015, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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