(17365) 1978 VF11
compiled by Wm. Robert Johnston
last updated 21 May 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: |
5.2669359 AU
| |
orbital period P: |
12.09 y (=4,415.05 d)
| |
eccentricity e: |
0.0778659
| |
perihelion distance q: |
4.8568212 AU
| |
aphelion distance Q: |
5.6770506 AU
| |
inclination i: |
11.64577°
| |
argument of perihelion omega: |
116.73133°
| |
ascending node OMEGA: |
252.14634°
| |
mean anomaly M: |
258.27635°
| |
perihelion passage TP: |
2012-NOV-16.54
| |
Epoch: |
18 JUN 2009
| |
data arc: |
1954-2006 (361 obs.)
|
orbital data, secondary:
|
semimajor axis a: |
(120 km)
| |
semimajor axis/primary radius a/Rp: |
?
| |
orbital period P: |
12.672 ± 0.019 h [M09a]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
92 km [M09a]
| |
absolute magnitude H: |
10.3 [JPL]
| |
rotation period: |
12.672 ± 0.019 h [M09a]
| |
amplitude delta M: |
0.98 ± 0.02 [M09a]
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
(0.04) assumed
| |
mass: |
?
| |
density: |
(0.78 +0.05/-0.08) g/cm3 [M09a]
| |
type: |
?
|
other data, secondary:
|
diameter: |
77 km [M09a]
| |
diameter ratio Ds/Dp: |
?
| |
component magnitude difference: |
?
| |
rotation period: |
?
|
|
--(17365) 1978 VF11--discovery and notes:
Primary discovered 7 November 1978 by E. F. Helin and S. J. Bus at Palomar Observatory, USA; linked to pre-discovery observations from 1954. Alternate designations 1998 MM49, 1999 RE121.
Companion identified by Rita K. Mann, David Jewitt, and Pedro Lacerda based on lightcurve observations from April 2005 and February-May 2006 suggesting a contact binary nature; reported September 2007.
See more information and links at
Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
Mann, Rita K., Jewitt, David, & Lacerda, Pedro 2007, Astronomical Journal Fraction of Contact Binary Trojan Asteroids
© 2009 by Wm. Robert Johnston.
Last modified 21 May 2009.
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