(4029) Bridges

compiled by Wm. Robert Johnston
last updated 13 October 2006

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: 2.5253362 AU
orbital period P: 4.01 y (=1465.8 d)
eccentricity e: 0.1327991
perihelion distance q: 2.1899738 AU
aphelion distance Q: 2.8606986 AU
inclination i: 5.44125°
argument of perihelion omega: 15.30199°
ascending node OMEGA: 214.89105°
mean anomaly M: 337.90579°
perihelion passage TP: 2006-06-03.961
Epoch: 06 MAR 2006
data arc: 1974-2004 (406 obs.)

orbital data, secondary:
semimajor axis a: ?
semimajor axis/primary radius a/Rp: ?
orbital period P: ?
eccentricity e: ?

other data, primary:
diameter: (10 km?)
absolute magnitude H: 12.9 [JPL]
rotation period: 3.694 h [JPL]
3.5745±0.0002 h [H06a]
amplitude delta M: 0.2±0.01 [H06a]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) [a]
geometric albedo: ?
mass: ?
density: ?
type: ?

other data, secondary:
diameter: ?
diameter ratio Ds/Dp: ?
component magnitude difference: ?
rotation period: ?

--(4029) Bridges--discovery and notes:

Primary discovered 24 May 1982 by C. Shoemaker at Palomar Observatory, California, USA, but linked to observations from 1974. Alternate designations 1982 KC1, 1974 HS2, 1975 TQ, 1978 AF, 1978 JJ2, 1982 OX, and 1986 JF.

Companion discovered by Ondrejov NEO Photometric Program based on lightcurve observations 11 April-4 May 2006 from Hunters Hill Observatory, Sonoita Research Observatory, and Goat Mountain Astronomical Research Station, announced May 2006.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2006 by Wm. Robert Johnston.
Last modified 13 October 2006.
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