Asteroids with Satellites Database--Johnston's Archive
(9940)
1988 VM3
compiled by Wm. Robert Johnston
last updated
6 October 2023
--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: |
2.1715936828 AU
| |
orbital period P: |
3.200192158 yr
(= 1168.8701858 d)
| |
eccentricity e: |
0.1696738794
| |
perihelion distance q: |
1.803130958 AU
| |
aphelion distance Q: |
2.5400564074 AU
| |
inclination i: |
2.21072471°
| |
argument of perihelion ω: |
341.62995°
| |
ascending node Ω: |
357.554498°
| |
mean anomaly M: |
11.2782733°
| |
perihelion passage TP: |
2023 Aug 07.381007
| |
Epoch: |
2023 Sep 13
| |
data arc: |
1950-2023
(2798 obs.)
| |
Earth MOID: |
0.793801 AU
| |
Jupiter Tisserand invariant TJ: |
3.668
|
orbital data, secondary:
|
semimajor axis as: |
6.9
km
[*E]
| |
separation/primary radius as/rp: | 4.7 [*E] | |
separation/Hill radius as/rH: | 0.017 [*E] | |
orbital period Ps: |
1.075
± 0.004
d [B23p]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
14.75
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.13
± 0.04
km [M**]
| |
geometric albedo: |
0.313
± 0.028
[M**]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
420 km [*E]
|
other data, primary:
|
diameter dp: |
2.93
± 0.037
km [*D]
| |
rotation period RPp: |
2.7135
± 0.0002
h [B23p]
| |
amplitude in mag., rotational ΔM: |
0.12
[B23p]
| |
amplitude in mag., mutual events ΔM: | 0.225 ±0.075 [B23p] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.11
± 0.014
km [*D]
| |
axial ratios a/b, b/c: | 1.2;? [B23p] | |
diameter ratio ds/dp: |
>0.38
[B23p]
| |
component mag. difference ΔM: |
2.1
[*D]
| |
rotation period RPs: |
25.8
± 0.1
h [B23p]
| |
|
|
--
(9940) 1988 VM3
--discovery and notes:
Primary discovered
1988 Nov 11 by Y. Oshima at Gekko, Japan.
Alternate designation(s):
1978 NV4.
Linked to prediscovery observations from 1950 Dec 09.
Permanent number assigned 1999 Feb 02.
Companion discovered
2023 Sep 07
by V. Benishek, P. Pravec, and R. Durkee
using
lightcurve
observations from Sopot Observatory, Serbia; Shed of Science South Observatory, Pontotoc, Texas, USA.
Announced
2023 Oct 02 [B23p].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
6 October 2023.
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