2001 QW322
compiled by Wm. Robert Johnston
last updated 23 November 2005
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: |
43.9426945 AU
| |
orbital period P: |
291.2985 y (=106399 d)
| |
eccentricity e: |
0.0278871
| |
perihelion distance q: |
42.7172602 AU
| |
aphelion distance Q: |
45.16812882 AU
| |
inclination i: |
4.81335°
| |
argument of perihelion omega: |
74.95859°
| |
ascending node OMEGA: |
124.69078°
| |
mean anomaly M: |
108.52807°
| |
perihelion passage TP: |
1917-10-23.8868056
| |
Epoch: |
18 AUG 2005
| |
data arc: |
2001-2004 (27 obs.)
| orbital data, secondary:
|
semimajor axis a: |
~120,000 ± 15,000 km [P08b]
| |
semimajor axis/primary radius a/Rp: |
(~2,200)
| |
orbital period P: |
~27 +3/-9 years [P08b]
| |
eccentricity e: |
~0.2 ± 0.2 [P08b]
| |
inclination i: |
124° ± 6° to ecliptic [P08b]
| |
other data, primary:
|
diameter: |
108 km? [P08b]
| |
absolute magnitude H: |
7.80 [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: |
0.16 assumed [P08b]
| |
mass (system): |
(1.3 ± 0.2) x 1018 kg [P08b];
(0.9 to 2.4) x 1018 kg [P08b]
| |
density: |
1.0 ± 0.2 g/cm3 [P08b]
| |
type: |
?
|
other data, secondary:
|
diameter: |
108 km? [P08b]
| |
diameter ratio Ds/Dp: |
(0.99 ± 0.01) [P08b]
| |
component magnitude difference: |
0.03 ± 0.02 [P08b]
| |
rotation period: |
?
|
|
--2001 QW322--discovery and notes:
Primary discovered 27 July 2001 from the CFHT at Mauna Kea, Hawaii, USA, by J. Kavelaars, J.-M. Petit, B. Gladman, and M. Holman.
Companion discovered from 24 August 2001 observations by J. Kavelaars at Mauna Kea, Hawaii, USA; announced 9 November 2001.
See more information and links at
Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Burns, J., Carruba, V., Gladman, B., & Marsden, B. G. 2002, Minor Planet Circulars 2001 QW322
- Kavelaars, J., Petit, J.-M., Gladman, B., Holman, M., Nicholson, P., Dumas, C., Harris, A. W., & Marsden, B. G. 2001, Minor Planet Electronic Circ., 2001-V34 (2001). 2001 QW322
© 2003-2005, 2008 by Wm. Robert Johnston.
Last modified 23 November 2005.
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