Asteroids with Satellites Database--Johnston's Archive
(4411)
Kochibunkyo
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: |
2.1672159197 AU
| |
orbital period P: |
3.1905200311 yr
(= 1165.3374414 d)
| |
eccentricity e: |
0.092309867
| |
perihelion distance q: |
1.967160506 AU
| |
aphelion distance Q: |
2.367271333 AU
| |
inclination i: |
2.25493975°
| |
argument of perihelion ω: |
11.008715°
| |
ascending node Ω: |
88.438932°
| |
mean anomaly M: |
29.174216°
| |
perihelion passage TP: |
2021 Oct 18.561650
| |
Epoch: |
2022 Jan 21
| |
data arc: |
1973-2022
(3417 obs.)
| |
Earth MOID: |
0.984017 AU
| |
Jupiter Tisserand invariant TJ: |
3.685
|
orbital data, secondary:
|
semimajor axis as: |
6
km
[*E]
| |
separation/primary radius as/rp: | 2.8 [*E] | |
separation/Hill radius as/rH: | 0.0090 [*E] | |
orbital period Ps: |
0.4994
± 0.0004
d [B22b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14.08
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
4.43
± 0.41
km [M11b]
| |
geometric albedo: |
0.271
± 0.060
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
670 km [*E]
|
other data, primary:
|
diameter dp: |
4.34
± 0.40
km [*D]
| |
rotation period RPp: |
2.69614
± 0.00006
h [B22b]
| |
amplitude in mag., rotational ΔM: |
0.16
[B22b]
| |
amplitude in mag., mutual events ΔM: | 0.07 ±0.02 [B22b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.91
± 0.12
km [*D]
| |
diameter ratio ds/dp: |
0.21
± 0.02
[B22b]
| |
component mag. difference ΔM: |
3.39
± 0.21
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(4411) Kochibunkyo
--discovery and notes:
Primary discovered
1990 Jan 03
from
Geisei, Japan
by
T. Seki.
Alternate designation(s):
1990 AF,
1973 YL3, 1976 YP, 1979 TU2, 1979 WZ7, 1982 SF3.
Linked to prediscovery observations from 1973 Dec 25.
Permanent number assigned 1990 Mar 11.
Named 1995 Jul 12 for the Kochi association of education volunteers [MPC025443].
Companion discovered
2022 Feb 02
by V. Benishek, P. Pravec, and R. Durkee
using
lightcurve
observations from Sopot Observatory, Serbia; Shed of Science South Observatory, Pontotoc, Texas, USA.
Announced
2022 Apr 15 [B22b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2022
by Wm. Robert Johnston.
Last modified
30 April 2022.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.