(5905) Johnson
compiled by Wm. Robert Johnston
last updated 6 December 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: |
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]
0.11; 0.15-0.18 [I8511]
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
(0.3)
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
(2 km)
| |
diameter ratio Ds/Dp: |
0.40 ± 0.04 [W05b]
0.38 ± 0.02 [W09b]
| |
component magnitude difference: |
(2.0)
| |
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 1-11 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:
© 2006-2008, 2009 by Wm. Robert Johnston.
Last modified 6 December 2009.
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