Asteroids with Satellites Database--Johnston's Archive
(10044)
Squyres
compiled by Wm. Robert Johnston
last updated
5 January 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: |
2.5642002977 AU
|
orbital period P: |
4.106162398 yr (= 1499.775816 d)
|
eccentricity e: |
0.334715374
|
perihelion distance q: |
1.705923035 AU
|
aphelion distance Q: |
3.422477561 AU
|
inclination i: |
16.4444912°
|
argument of perihelion ω: |
32.6231865°
|
ascending node Ω: |
317.9671764°
|
mean anomaly M: |
45.0169032°
|
perihelion passage TP: |
2022 Aug 21.457603
|
Epoch: |
2023 Feb 25
|
data arc: |
1985-2022
(2091 obs.)
|
Earth MOID: |
0.716893 AU
|
Jupiter Tisserand invariant TJ: |
3.298
|
orbital data, secondary:
semimajor axis as: |
8.3
km
[*E]
|
separation/primary radius as/rp: | 3.7 [*E] |
separation/Hill radius as/rH: | 0.014 [*E] |
orbital period Ps: |
0.7779
± 0.0004
d [B23a]
|
eccentricity es: |
?
|
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
absolute mag. H: |
13.57
[MPC]
|
slope parameter G: |
(0.15) [*A]
|
effective diameter dE: |
4.61
± 0.21
km [M**]
|
geometric albedo: |
0.362
± 0.062
[M**]
|
color index U-B: |
?
|
color index B-V: |
?
|
color index J-H: | 1.354 [LMP] |
taxonomic type: |
?
|
mass m: |
?
|
density ρ: |
(1.6
g/cm3) [*A]
|
Hill radius rH: |
590 km [*E]
|
other data, primary:
diameter dp: |
4.44
± 0.20
km [*D]
|
rotation period RPp: |
3.3356
± 0.0005
h [B23a]
|
amplitude in mag., rotational ΔM: |
0.1
[B23a]
|
amplitude in mag., mutual events ΔM: | 0.12 ±0.04 [B23a] |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
diameter ds: |
>1.24
± 0.057
km [*D]
|
diameter ratio ds/dp: |
>0.28
[B23a]
|
component mag. difference ΔM: |
<2.8
[*D]
|
rotation period RPs: |
?
|
|
|
--
(10044) Squyres
--discovery and notes:
Primary discovered
1985 Sep 15
from
Palomar Observatory, California, USA
by
C. S. Shoemaker and E. M. Shoemaker.
Alternate designation(s):
1985 RU,
1989 PD.
Permanent number assigned 1999 Mar 02.
Named 2002 Sep 21 for Steven W. Squyres (1956-) [MPC046682].
Companion discovered
2022 Aug 12
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 Jan 04 [B23a].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2023
by Wm. Robert Johnston.
Last modified
5 January 2023.
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