(32008) 2000 HM53

compiled by Wm. Robert Johnston
last updated 13 January 2009

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: 2.1921423 AU
orbital period P: 3.25 y (=1,185.50 d)
eccentricity e: 0.1923358
perihelion distance q: 1.7705149 AU
aphelion distance Q: 2.6137697 AU
inclination i: 6.29902°
argument of perihelion omega: 143.88515°
ascending node OMEGA: 221.97385°
mean anomaly M: 353.01920°
perihelion passage TP: 2007-11-18.98816
Epoch: 27 OCT 2007
data arc: 1991-2004 (193 obs.)

orbital data, secondary:
semimajor axis a: (17 km?)
semimajor axis/primary radius a/Rp: (7?)
orbital period P: 40.24 ± 0.02 h [C1078]
eccentricity e: ?

other data, primary:
diameter: (5 km?)
absolute magnitude H: 14.17 ± 0.1 [C1078]
rotation period: 3.0171 ± 0.0001 h [C1078]
amplitude delta M: 0.19 [C1078]
0.20 ± 0.03 [HHa]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.18) assumed
mass: ?
density: ?
type: ?

other data, secondary:
diameter: (2 km?)
diameter ratio Ds/Dp: >= 0.4 [C1078]
component magnitude difference: (2.0)
rotation period: ?

--(32008) 2000 HM53--discovery and notes:

Primary discovered 29 April 2000 by the LINEAR program at Socorro, New Mexico, USA. Alternate designation 1994 PZ39.

Secondary identified by P. Pravec, P. Kusnirak, K. Hornoch, J. Vilagi, L. Kornos, A. Galad, D. Higgins, V. Chiorny, D. Pray, R. Stephens, V. Reddy, and R. Dyvig based on lightcurve observations obtained 5 August to 14 September 2007, announced 20 September 2007.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007-2008, 2009 by Wm. Robert Johnston.
Last modified 13 January 2009.
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