Asteroids with Satellites Database--Johnston's Archive
(9332)
1990 SB1
compiled by Wm. Robert Johnston
last updated
3 May 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: |
2.579766173 AU
| |
orbital period P: |
4.1435302684 yr
(= 1513.453014 d)
| |
eccentricity e: |
0.109236047
| |
perihelion distance q: |
2.29796272 AU
| |
aphelion distance Q: |
2.861569631 AU
| |
inclination i: |
12.6585623°
| |
argument of perihelion ω: |
211.872094°
| |
ascending node Ω: |
346.399699°
| |
mean anomaly M: |
132.70205°
| |
perihelion passage TP: |
2017 Oct 16.11579
| |
Epoch: |
2019 Apr 27
| |
data arc: |
1951-2019
(1687 obs.)
| |
Earth MOID: |
1.30791 AU
| |
Jupiter Tisserand invariant TJ: |
3.383
|
orbital data, secondary:
|
semimajor axis as: |
21
km
[*E]
| |
separation/primary radius as/rp: | 7.0 [*E] | |
separation/Hill radius as/rH: | 0.020 [*E] | |
orbital period Ps: |
2.035
± 0.0012
d [P19c]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
13.1
[MPC]
13.32 ± 0.03 [P19c]
| |
slope parameter G: |
0.28 [P19c]
| |
effective diameter dE: |
6.18
± 0.20
km [M11b]
| |
geometric albedo: |
0.320
± 0.065
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1100 km [*E]
|
other data, primary:
|
diameter dp: |
5.98
± 0.19
km [*D]
| |
rotation period RPp: |
2.98701
± 0.00008
h [P19c]
| |
amplitude in mag., rotational ΔM: |
0.39
[P19c]
| |
amplitude in mag., mutual events ΔM: | 0.07 [P19c] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.56
± 0.13
km [*D]
| |
diameter ratio ds/dp: |
0.26
± 0.02
[P19c]
| |
component mag. difference ΔM: |
2.9
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(9332) 1990 SB1
--discovery and notes:
Primary discovered
1990 Sep 16
from
Palomar Observatory, California, USA
by
H. E. Holt.
Alternate designation(s):
1951 EZ2, 1994 TU15.
Linked to prediscovery observations from 1951 Mar 05.
Permanent number assigned 1998 Oct 05.
Companion discovered
2019 Sep 21
by P. Pravec, P. Kusnirak, K. Hornoch, H. Kucakova, P. Fatka
using
lightcurve
observations from La Silla Obsevatory; Ondrejov Observatory.
Announced
2019 Oct 16 [P19c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2019, 2022
by Wm. Robert Johnston.
Last modified
3 May 2022.
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