(9617) Grahamchapman

compiled by Wm. Robert Johnston
last updated 28 November 2008

Orbital elements and other data (Assumed or derived values in parenthesis, my estimates in italics and parenthesis. Source identifications in brackets, see this link for sources):

orbital data, primary (osculating elements) [JPL]:
semimajor axis a: 2.2242896 AU
orbital period P: 3.32 y (=1211.7 d)
eccentricity e: 0.1127922
perihelion distance q: 1.9734071 AU
aphelion distance Q: 2.4751721 AU
inclination i: 6.13858°
argument of perihelion omega: 280.98230°
ascending node OMEGA: 165.70033°
mean anomaly M: 48.94558°
perihelion passage TP: 2006-09-22.26
Epoch: 06 MAR 2006
data arc: 1951-2003 (329 obs.)

orbital data, secondary:
semimajor axis a: (8.5 km?)
semimajor axis/primary radius a/Rp: (4?)
orbital period P: 19.385 ± 0.005 h [C414]
eccentricity e: ?

other data, primary:
diameter: (4 km?)
absolute magnitude H: 14.1 [JPL]
rotation period: 2.2856 ± 0.0001 [C414]
amplitude delta M: 0.10; 0.07-0.16 [C414]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.20) assumed
mass: ?
density: ?
type: ?

other data, secondary:
diameter: (1.2 km?)
diameter ratio Ds/Dp: 0.27 ± 0.03 [C414]
component magnitude difference: (2.8)
rotation period: ?

--(9617) Grahamchapman--discovery and notes:

Primary discovered 17 March 1993 by the Uppsala-ESO Survey from European Southern Observatory. Alternate designation 1993 FA5.

Companion discovered by D. Pray, P. Pravec, P. Kusnirak, V. Reddy, R. Dyvig, and S. Gajdos from lightcurve observations from 27 January-28 February 2006, announced 1 March 2006.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2006, 2008 by Wm. Robert Johnston.
Last modified 28 November 2008.
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