2004 DC
compiled by Wm. Robert Johnston
last updated 23 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: |
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 by P. A. Taylor, J. L. Margot, M. C. Nolan, L. A. M. Benner, S. J. Ostro, and J. D. Giorgini on 2 June 2006 based on radar observations 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, 2008 by Wm. Robert Johnston.
Last modified 23 November 2008.
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