Asteroids with Satellites Database--Johnston's Archive
(9617)
Grahamchapman
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: |
2.224704823 AU
| |
orbital period P: |
3.318308784 yr
(= 1212.012283 d)
| |
eccentricity e: |
0.113042943
| |
perihelion distance q: |
1.973217643 AU
| |
aphelion distance Q: |
2.476192003 AU
| |
inclination i: |
6.1368614°
| |
argument of perihelion ω: |
281.245340°
| |
ascending node Ω: |
165.582679°
| |
mean anomaly M: |
219.978636°
| |
perihelion passage TP: |
2015 Sep 06.4100
| |
Epoch: |
2014 May 23
| |
data arc: |
1951-2013
(1035 obs.)
| |
Earth MOID: |
0.99966 AU
| |
Jupiter Tisserand invariant TJ: |
3.631
|
orbital data, secondary:
|
binary dynamical type: | A [P07f] | |
semimajor axis as: |
5.2
km
[*E]
| |
separation/primary radius as/rp: | 3.8 [*E] | |
separation/Hill radius as/rH: | 0.012 [*E] | |
orbital period Ps: |
0.8077
± 0.0002
d [P06e]
| |
eccentricity es: |
?
| |
normalized ang. mom. αL: |
1.19
[P07f]
|
|
other data, system (combined):
|
absolute mag. H: |
14.6
[MPC]
| |
slope parameter G: |
(0.15) [*A]
| |
effective diameter dE: |
2.84
± 0.38
km [M11b]
| |
geometric albedo: |
0.244
± 0.039
[M11b]
| |
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: |
2.74
± 0.37
km [*D]
| |
rotation period RPp: |
2.2856
± 0.0001
h [P06e]
| |
amplitude in mag., rotational ΔM: |
0.10
[P06e]
| |
amplitude in mag., mutual events ΔM: | 0.115 ±0.045 [P06e] | |
pole direction Β, λ: |
?
,
?
|
other data, secondary:
|
diameter ds: |
0.74
± 0.13
km [*D]
| |
diameter ratio ds/dp: |
0.27
± 0.03
[P06e]
| |
component mag. difference ΔM: |
2.8
± 0.2
[*D]
| |
rotation period RPs: |
?
| |
|
|
--
(9617) Grahamchapman
--discovery and notes:
Primary discovered
1993 Mar 17
from
European Southern Observatory, La Silla, Chile
by
UESAC.
Alternate designation(s):
1993 FA5
.
Linked to prediscovery observations from 1951 Aug 08.
Permanent number assigned 1998 Nov 10.
Named 2000 Mar 20 for Graham Chapman (1941-1989) [MPC39653].
Companion discovered
2006 Jan 27
by D. Pray, P. Pravec, P. Kusnirak, V. Reddy, R. Dyvig, and S. Gajdos
using
lightcurve
observations from Carbuncle Hill Observatory, Greene, Rhode Island, USA; Ondrejov Observatory, Czech Republic; University of North Dakota, Grand Forks, North Dakota, USA; Modra Observatory, Slovakia.
Announced
2006 Mar 01 [P06e].
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
©
2006-2008, 2014
by Wm. Robert Johnston.
Last modified
21 September 2014.
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