1999 XY143
compiled by Wm. Robert Johnston
last updated 24 October 2009
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: |
42.9656 AU
| |
orbital period P: |
281.64 y (=102,868 d)
| |
eccentricity e: |
0.08339
| |
perihelion distance q: |
39.3827 AU
| |
aphelion distance Q: |
46.5484 AU
| |
inclination i: |
7.17166°
| |
argument of perihelion omega: |
79.708°
| |
ascending node OMEGA: |
255.44005°
| |
mean anomaly M: |
105.560°
| |
perihelion passage TP: |
1927-06-06.0
| |
Epoch: |
04 JAN 2010
| |
data arc: |
1999-2008 (26 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(~2,600 km separation)
| |
semimajor axis/primary radius a/Rp: |
(25?)
| |
orbital period P: |
(~14 d?)
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
(212 km?)
| |
absolute magnitude H: |
6.0059±0.5654 [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: |
(178 km?)
| |
diameter ratio Ds/Dp: |
(0.84)
| |
component magnitude difference: |
0.38 [I9075]
| |
rotation period: |
?
|
|
--1999 XY143--discovery and notes:
Primary discovered 1999.
Companion announced 24 September 2009.
See more information and links at
Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
© 2009 by Wm. Robert Johnston.
Last modified 24 October 2009.
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