Asteroids with Satellites Database--Johnston's Archive
(1052)
Belgica
compiled by Wm. Robert Johnston
last updated
21 September 2014
--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: |
2.235833262 AU
| |
orbital period P: |
3.343238208 yr
(= 1221.1177550 d)
| |
eccentricity e: |
0.143528228
| |
perihelion distance q: |
1.91492808 AU
| |
aphelion distance Q: |
2.556738448 AU
| |
inclination i: |
4.6957669°
| |
argument of perihelion ω: |
297.450734°
| |
ascending node Ω: |
99.643919°
| |
mean anomaly M: |
185.920955°
| |
perihelion passage TP: |
2016 Jan 03.47503
| |
Epoch: |
2014 May 23
| |
data arc: |
1908-2014
(1270 obs.)
| |
Earth MOID: |
0.926504 AU
| |
Jupiter Tisserand invariant TJ: |
3.62
|
orbital data, secondary:
|
semimajor axis as: |
34
km
[*E]
| |
separation/primary radius as/rp: | 6.9 [*E] | |
separation/Hill radius as/rH: | 0.023 [*E] | |
orbital period Ps: |
1.969
± 0.0008
d [F13c]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
?
|
|
other data, system (combined):
|
absolute mag. H: |
11.97
[MPC]
12.17 ± 0.05 [F13f]
| |
slope parameter G: |
0.24 [F13c]
| |
effective diameter dE: |
10.41
± 0.08
km [M11b]
| |
geometric albedo: |
0.273
± 0.074
[M11b]
| |
color index U-B: |
0.54
[JPL]
| |
color index B-V: |
0.9
[JPL]
| |
taxonomic type: |
S (SMASSII) [JPL]
S (Tholen) [JPL]
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
1500 km [*E]
|
other data, primary:
|
diameter dp: |
9.79
± 0.08
km [*D]
| |
rotation period RPp: |
2.7097
± 0.0001
h [F13c]
| |
amplitude in mag., rotational ΔM: |
0.08
[F13c]
| |
amplitude in mag., mutual events ΔM: | 0.13 [F13c] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
3.53
km [*D]
| |
diameter ratio ds/dp: |
>0.36
± 0.02
[F13c]
| |
component mag. difference ΔM: |
<2.2
± 0.1
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(1052) Belgica
--discovery and notes:
Primary discovered
1925 Nov 15
from
Uccle, Belgium
by
E. Delporte.
Alternate designation(s):
1925 VD,
1965 UO1, A908 TB.
Linked to prediscovery observations from 1908 Oct 03.
Permanent number assigned -.
Named 1926 for Belgium.
Companion discovered
2012 Nov 17
by L. Franco, P. Pravec, A. Ferrero, and L. Martinez
using
lightcurve
observations from Rome, Italy; Ondrejov Observatory, Czech Republic; Mombercelli, Asti, Italy; Casa Grande, Arizona, USA.
Announced
2013 Jan 07 [F13c].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Franco, Lorenzo, Ferrero, Andrea, Martinez, Luis, Pravec, Petr, & Padovan, Stefano 2013, Minor Planet Bulletin Binary Nature for the Asteroid 1052 Belgica
- Franco, L., Pravec, P., Ferrero, A., & Martinez, L. 2013, Central Bureau Electronic Telegrams (1052) Belgica
- Bus, S. & Binzel, R. P. 2004, NASA Planetary Data System 1052 Belgica CCD Spectrum
- Liu, C.-R. 1958, Minor Planet Circulars New Elements of (1052) Belgica
©
2013, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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