2004 DC
compiled by Wm. Robert Johnston
last updated 5 March 2007
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: |
1.636161640 AU
| |
orbital period P: |
2.090 y (=764.430024 d)
| |
eccentricity e: |
0.400470391
| |
perihelion distance q: |
0.98092735 AU
| |
aphelion distance Q: |
2.291395932 AU
| |
inclination i: |
19.43238827°
| |
argument of perihelion omega: |
156.1986116°
| |
ascending node OMEGA: |
75.0250033°
| |
mean anomaly M: |
326.885728°
| |
perihelion passage TP: |
2006-05-15.315400
| |
Epoch: |
06 MAR 2006
| |
data arc: |
829 days (120 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
>=0.6 km [T06a]
| |
semimajor axis/primary radius a/Rp: |
(>=4)
| |
orbital period P: |
23 h [T06a]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
0.3 km [B06e]
| |
absolute magnitude H: |
18.0 ± 0.6 [JPL]
| |
rotation period: |
~2 h? [T06a]
| |
amplitude delta M: |
?
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
?
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
60 m [T06a]
| |
diameter ratio Ds/Dp: |
(0.2)
| |
component magnitude difference: |
(3.5)
| |
rotation period: |
?
|
|
--2004 DC--discovery and notes:
Primary discovered 16 February 2004.
Companion discovered based on radar observations in June 2006 from Arecibo and Goldstone.
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
- Taylor, Patrick A., Margot, J. L., Nolan, M. C., Benner, L. A., Ostro, S. J., Giorgini, J. D., & Magri, C. 2006, AAS/Division for Planetary Sciences Meeting Abstracts Radar Imaging of Binary Near-Earth Asteroid 2004 DC
© 2006, 2007 by Wm. Robert Johnston.
Last modified 5 March 2007.
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