Asteroids with Satellites Database--Johnston's Archive
(10208)
Germanicus
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: |
2.235408893 AU
| |
orbital period P: |
3.342286416 yr
(= 1220.770113 d)
| |
eccentricity e: |
0.201491830
| |
perihelion distance q: |
1.78499227 AU
| |
aphelion distance Q: |
2.685825522 AU
| |
inclination i: |
4.5565714°
| |
argument of perihelion ω: |
114.478586°
| |
ascending node Ω: |
223.754530°
| |
mean anomaly M: |
357.778150°
| |
perihelion passage TP: |
2014 May 30.53435
| |
Epoch: |
2014 May 23
| |
data arc: |
1987-2013
(837 obs.)
| |
Earth MOID: |
0.780906 AU
| |
Jupiter Tisserand invariant TJ: |
3.608
|
orbital data, secondary:
|
binary dynamical type: | A [M09a] | |
semimajor axis as: |
13
km
[*E]
| |
separation/primary radius as/rp: | 8.0 [*E] | |
separation/Hill radius as/rH: | 0.028 [*E] | |
orbital period Ps: |
2.44
± 0.0008
d [O07b]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.24
[M09a]
|
|
other data, system (combined):
|
absolute mag. H: |
14.4
[MPC]
14.2 ± 0.2 [O07b]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
3.55
± 0.2
km [M11b]
| |
geometric albedo: |
0.267
± 0.027
[M11b]
| |
color index U-B: |
?
| |
color index B-V: |
?
| |
taxonomic type: |
?
| |
mass m: |
?
| |
density ρ: |
(1.6
g/cm3) [*A]
| |
Hill radius rH: |
460 km [*E]
|
other data, primary:
|
diameter dp: |
3.23
± 0.18
km [*D]
| |
rotation period RPp: |
3.34825
± 0.00008
h [O07c]
| |
amplitude in mag., rotational ΔM: |
0.13
± 0.04
[O07c]
| |
amplitude in mag., mutual events ΔM: | 0.21 [O07b] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
1.48
± 0.11
km [*D]
| |
diameter ratio ds/dp: |
0.46
± 0.02
[O07b]
| |
component mag. difference ΔM: |
1.7
± 0.1
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(10208) Germanicus
--discovery and notes:
Primary discovered
1997 Aug 30
from
Santa Lucia Observatory, Italy
by
A. Vagnozzi.
Alternate designation(s):
1997 QN1,
1987 QJ7, 1994 WP12.
Linked to prediscovery observations from 1987 Aug 31.
Permanent number assigned 1999 Mar 02.
Named 2010 May 27 for Germanicus (15 BC-19 AD) [MPC70407].
Companion discovered
2007 Aug 06
by J. Oey, P. Pravec, P. Kusnirak, Yu. Krugly, V. Chiorny, and J. Ries
using
lightcurve
observations from Leura, New South Wales, Australia; Ondrejov Observatory, Czech Republic; Kharkiv National University, Main Astronomical Observatory, Ukraine; McDonald Observatory, Texas, USA.
Announced
2007 Sep 25 [O07b].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Oey, J., Pravec, P., Kusnirak, P., Krugly, Yu., Chiorny, V., & Ries, J. 2007, Central Bureau Electronic Telegrams (10208) 1997 QN1
©
2007-2010, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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