1999 OJ4
compiled by Wm. Robert Johnston
last updated 28 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: |
37.969331 AU
| |
orbital period P: |
233.9686 y (=85,458 d)
| |
eccentricity e: |
0.0245304
| |
perihelion distance q: |
37.0379284 AU
| |
aphelion distance Q: |
38.90073418 AU
| |
inclination i: |
4.00148°
| |
argument of perihelion omega: |
295.84052°
| |
ascending node OMEGA: |
127.50433°
| |
mean anomaly M: |
263.5454°
| |
perihelion passage TP: |
2068-04-25.4734703
| |
Epoch: |
18 AUG 2005
| |
data arc: |
1999-2002 (21 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
3,267 ± 60 km [G09a]
| |
semimajor axis/primary radius a/Rp: |
(87)
| |
orbital period P: |
84.115 ± 0.038 d [G09a]
| |
eccentricity e: |
0.365 ± 0.012 [G09a]
| |
inclination i: |
53.8° ± 1.2° [G09a]
99.8° ± 1.5° [G09a]
| |
other data, primary:
|
diameter: |
(75 km ± 17 km) [G09a]
| |
absolute magnitude H: |
7.344 ± 0.012 [G09a]
| |
rotation period: |
?
| |
amplitude delta M: |
?
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) [a]
| |
geometric albedo: |
0.21 ± 0.09 [G09a]
| |
mass (system): |
(3.91 ± 0.22) x1017 kg [G09a]
| |
density: |
?
| |
BBFB type: |
RR? [B05c]
|
other data, secondary:
|
diameter: |
(72 km ± 17 km)
| |
diameter ratio Ds/Dp: |
(0.96 ± 0.01)
| |
component magnitude difference: |
0.088 ± 0.020 [G09a]
| |
rotation period: |
?
|
|
--1999 OJ4--discovery and notes:
Primary discovered 18 July 1999 from Mauna Kea observatory.
Companion discovered by Denise C. Stephens and Keith S. Noll from Hubble Space Telescope observations of 4 October 2002; announced 5 October 2005.
See more information and links at
Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Gladman, B., M, J., & Marsden, B. G. 2000, Minor Planet Electronic Circulars 1999 OJ4
- Marsden, B. G. 1999, Minor Planet Electronic Circulars SEVEN NEW
- Marsden, B. G. 1999, Minor Planet Electronic Circulars SEVEN NEW
- Kavelaars, J. J., Gladman, B., Holman, M., Petit, J.-M., Scholl, H., Nicholson, P. D., Burns, J. A., & Marsden, B. G. 1999, Minor Planet Electronic Circulars SEVEN NEW
© 2005, 2008 by Wm. Robert Johnston.
Last modified 28 December 2008.
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