Asteroids with Satellites Database--Johnston's Archive
(5112)
Kusaji
compiled by Wm. Robert Johnston
last updated
30 April 2022
--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: |
2.174806534 AU
| |
orbital period P: |
3.207236189 yr
(= 1171.4651429 d)
| |
eccentricity e: |
0.130096161
| |
perihelion distance q: |
1.89187255 AU
| |
aphelion distance Q: |
2.457740516 AU
| |
inclination i: |
5.76423°
| |
argument of perihelion ω: |
341.558941°
| |
ascending node Ω: |
62.696346°
| |
mean anomaly M: |
329.562288°
| |
perihelion passage TP: |
2016 Nov 07.046439
| |
Epoch: |
2016 Jul 31
| |
data arc: |
1971-2016
(1060 obs.)
| |
Earth MOID: |
0.900662 AU
| |
Jupiter Tisserand invariant TJ: |
3.668
|
orbital data, secondary:
|
semimajor axis as: |
7
km
[*E]
| |
separation/primary radius as/rp: | 4.23 [*E] | |
separation/Hill radius as/rH: | 0.014 [*E] | |
orbital period Ps: |
0.8642
± 0.0004
d [C16a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.8
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.42
± 0.13
km [M12b]
| |
geometric albedo: |
0.500
± 0.081
[M12b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
490 km [*E]
|
other data, primary:
|
diameter dp: |
3.27
± 0.13
km [*D]
| |
rotation period RPp: |
2.7995
± 0.0001
h [C16a]
| |
amplitude in mag., rotational ΔM: |
0.12
[C16a]
| |
amplitude in mag., mutual events ΔM: | 0.135 ±0.035 [C16a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.01
± 0.08
km [*D]
| |
axial ratios a/b, b/c: | 1.3;? [] | |
diameter ratio ds/dp: |
0.31
± 0.02
[C16a]
| |
component mag. difference ΔM: |
2.5
± 0.2
[*D]
| |
rotation period RPs: |
20.74
± 0.01
h [C16a]
| |
|
|
--
(5112) Kusaji
--discovery and notes:
Primary discovered
1987 Sep 23
from
Kushiro, Hokkaido, Japan
by
S. Ueda and H. Kaneda.
Alternate designation(s):
1987 SM13,
1971 TK1, 1987 SL29, 1990 OV1.
Linked to prediscovery observations from 1971 Oct 11.
Permanent number assigned 1992 Mar 18.
Named 1993 Sep 01 for Shigeji Kusaji (1879-1956) [MPC22506].
Companion discovered
2016 Oct 25
by V. Chiorny, P. Pravec, D. Romeuf, R. Montaigut, A. Leroy, C. Gillier, V. Benishek, A. Marchini, R. Papini, F. Salvaggio, and J. Oey
using
lightcurve
observations from Kharkiv Observatory, Ukraine; Pommier Observatory, France; OPERA Observatory; Sopot Observatory, Serbia; Astronomical Observatory of the University of Siena; Blue Mountains Observatory.
Announced
2016 Nov 10 [C16a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2016, 2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
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