Asteroids with Satellites Database--Johnston's Archive
(6244)
Okamoto
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: |
2.159377811 AU
| |
orbital period P: |
3.173227095 yr
(= 1159.021197 d)
| |
eccentricity e: |
0.152704068
| |
perihelion distance q: |
1.829632036 AU
| |
aphelion distance Q: |
2.489123587 AU
| |
inclination i: |
5.399463626°
| |
argument of perihelion ω: |
51.51572002°
| |
ascending node Ω: |
331.3782905°
| |
mean anomaly M: |
133.6784756°
| |
perihelion passage TP: |
2013 Mar 18.62170
| |
Epoch: |
2014 May 23
| |
data arc: |
1933-2014
(1202 obs.)
| |
Earth MOID: |
0.836487 AU
| |
Jupiter Tisserand invariant TJ: |
3.677
|
orbital data, secondary:
|
binary dynamical type: | A [L15a] | |
semimajor axis as: |
12
km
[*E]
| |
separation/primary radius as/rp: | 3.9 [*E] | |
separation/Hill radius as/rH: | 0.014 [*E] | |
orbital period Ps: |
0.8467
± 0.0004
d [H06a]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.5
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
6.29
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: |
870 km [*E]
|
other data, primary:
|
diameter dp: |
6.1
km [*E]
| |
rotation period RPp: |
2.8958
± 0.0001
h [H06a]
| |
amplitude in mag., rotational ΔM: |
0.11
[H06a]
| |
amplitude in mag., mutual events ΔM: | 0.11 ±0.04 [H06a] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.53
km [*E]
| |
diameter ratio ds/dp: |
0.25
± 0.02
[H06a]
| |
component mag. difference ΔM: |
3.01
± 0.17
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(6244) Okamoto
--discovery and notes:
Primary discovered
1990 Aug 20
from
Geisei, Japan
by
T. Seki.
Alternate designation(s):
1990 QF,
1952 SG1, 1987 SL25.
Linked to prediscovery observations from 1933 Sep 27.
Permanent number assigned 1995 Feb 15.
Named 1998 Jun 10 for Hiroshi Okamoto (1915-) [MPC032093].
Companion discovered
2006 Sep 26
by D. Higgins, D. Pray, P. Kusnirak, and P. Pravec
using
lightcurve
observations from Canberra, Australia; Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic.
Announced
2006 Oct 19 [H06a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Higgins, D., Pray, D., Kusnirak, P., & Pravec, P. 2006, Central Bureau Electronic Telegrams (6244) Okamoto
©
2006-2014, 2019
by Wm. Robert Johnston.
Last modified
29 May 2019.
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