2003 QR91
compiled by Wm. Robert Johnston
last updated 26 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: |
46.7954345 AU
| |
orbital period P: |
320.12 y (=116,924.1 d)
| |
eccentricity e: |
0.1902066
| |
perihelion distance q: |
37.894634 AU
| |
aphelion distance Q: |
55.6962350 AU
| |
inclination i: |
3.48948°
| |
argument of perihelion omega: |
10.78823°
| |
ascending node OMEGA: |
273.11510°
| |
mean anomaly M: |
23.46058°
| |
perihelion passage TP: |
1986-05-30
| |
Epoch: |
10 APR 2007
| |
data arc: |
2003-2004 (12 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(1,700 km separation?) [N07a]
| |
semimajor axis/primary radius a/Rp: |
(20?)
| |
orbital period P: |
(8 d?)
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
(187 km?)
| |
absolute magnitude H: |
6.2 [JPL]
| |
rotation period: |
?
| |
amplitude delta M: |
?
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
(0.09) assumed
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
(171 km?)
| |
diameter ratio Ds/Dp: |
(0.91)
| |
component magnitude difference: |
0.2 ± 0.3 [N07a]
| |
rotation period: |
?
|
|
--2003 QR91--discovery and notes:
Primary discovered 24 August 2003 by M. W. Buie from Cerro Tololo Observatory, La Serena, Chile.
Companion reported March 2007.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Noll, Keith S., Grundy, William M., Chiang, Eugene I., Margot, Jean-Luc, & Kern, Susan D. 2007, ArXiv Astrophysics e-prints Binaries in the Kuiper Belt
- Pittichova, J., Meech, K. J., Wasserman, L. H., & Marsden, B. G. 2004, Minor Planet Electronic Circulars 2003 QR91
- Buie, M. W., Wasserman, L. H., Millis, R. L., Kern, S. D., Hutchison, L. E., Qu, J. J., Lundgren, E. W., Gulbisdgren, A. A. S., Kane, J. F., & Marsden, B. G. 2003, Minor Planet Electronic Circulars EIGHT TNOs
© 2007, 2008 by Wm. Robert Johnston.
Last modified 26 November 2008.
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