(5905) Johnson

compiled by Wm. Robert Johnston
last updated 14 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: 1.9103227 AU
orbital period P: 2.6404 y (=964.4 d)
eccentricity e: 0.0717219
perihelion distance q: 1.7733107 AU
aphelion distance Q: 2.04733467 AU
inclination i: 27.51899°
argument of perihelion omega: 208.75395°
ascending node OMEGA: 141.33477°
mean anomaly M: 256.97203°
perihelion passage TP: 2006-05-21.0013356
Epoch: 18 AUG 2005
data arc: 1989-2000 (52 obs.)

orbital data, secondary:
semimajor axis a: (11 km?)
semimajor axis/primary radius a/Rp: (4.5?)
orbital period P: 21.785 ± 0.0005 h [W05b]
eccentricity e: ?

other data, primary:
diameter: 5 km [W05b]
absolute magnitude H: 13.2 [JPL]
rotation period: 3.7824 ± 0.0002 h [W05b]
amplitude delta M: 0.11 [W05b]
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: (2 km)
diameter ratio Ds/Dp: 0.40 ± 0.04 [W05b]
component magnitude difference: ?
rotation period: ?

--(5905) Johnson--discovery and notes:

Primary discovered 11 February 1989 by E. F. Helin from Palomar Observatory, California, USA. Alternate designation 1989 CJ1.

Secondary discovered from analysis of lightcurve observations made in April 2005 by B. Warner, P. Pravec, P. Kusnirak, D. Pray, A. Galad, S. Gajdos, P. Brown, and Z. Krzeminski; reported 13 April 2005.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2005, 2006 by Wm. Robert Johnston.
Last modified 14 October 2006.
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