(5477) 1989 UH2
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: |
1.9172862 AU
| |
orbital period P: |
2.6548 y (=969.7 d)
| |
eccentricity e: |
0.0755041
| |
perihelion distance q: |
1.7725232 AU
| |
aphelion distance Q: |
2.06204917 AU
| |
inclination i: |
22.55214°
| |
argument of perihelion omega: |
290.30768°
| |
ascending node OMEGA: |
49.18136°
| |
mean anomaly M: |
27.35352°
| |
perihelion passage TP: |
2005-06-05.3217034
| |
Epoch: |
18 AUG 2005
| |
data arc: |
1989-2001 (154 obs.)
| orbital data, secondary:
|
semimajor axis a: |
(~13 km?)
| |
semimajor axis/primary radius a/Rp: |
(4.5?)
| |
orbital period P: |
24.42 ± 0.02 h [C288]
24.410 ± 0.002 h [LOa]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
(6 km?)
| |
absolute magnitude H: |
13.4 [JPL]
| |
rotation period: |
2.9943 ± 0.0002 h [C288]
2.99390 ± 0.00008 h [LOa]
| |
amplitude delta M: |
0.11; 0.14-0.22 [C288]
0.10 ± 0.05 [LOa]
| |
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: |
(2 km?)
| |
diameter ratio Ds/Dp: |
0.37 ± 0.02 [C288]
| |
component magnitude difference: |
(2.2)
| |
rotation period: |
?
|
|
--(5477) 1989 UH2--discovery and notes:
Primary discovered 27 October 1989 from Palomar Observatory, California, USA, by E. F. Helin.
Secondary identified by B. D. Warner, P. Pravec, P. Kusnirak, W. Cooney, J. Gross, D. Terrell, D. Higgins, L. Kornos, J. Vilagi, D. Pray, G. Masi, and F. Mallia based on lightcurve observations from 2-12 November 2005; reported 15 November 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, 2008 by Wm. Robert Johnston.
Last modified 28 November 2008.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.