2005 NB7
compiled by Wm. Robert Johnston
last updated 28 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: |
2.04530575 AU
| |
orbital period P: |
2.93 y (=1,068.40469 d)
| |
eccentricity e: |
0.51667328
| |
perihelion distance q: |
0.98855092 AU
| |
aphelion distance Q: |
3.10206059 AU
| |
inclination i: |
12.68111°
| |
argument of perihelion omega: |
293.042041°
| |
ascending node OMEGA: |
199.30279°
| |
mean anomaly M: |
14.051581°
| |
perihelion passage TP: |
2008-04-02.29785
| |
Epoch: |
14 MAY 2008
| |
data arc: |
2002-2008 (125 obs.)
| orbital data, secondary:
|
semimajor axis a: |
>=0.6 km [I8936]
(0.8 km)
| |
semimajor axis/primary radius a/Rp: |
(~3)
| |
orbital period P: |
15.28 ± 0.01 h [C1383]
15.267 ± 0.094 h [V08a]
| |
eccentricity e: |
?
| |
other data, primary:
|
diameter: |
0.5 ± 0.1 km [I8936]
| |
absolute magnitude H: |
18.933 ± 0.545 [JPL]
| |
rotation period: |
3.4883 ± 0.0001 h [C1383]
3.472 ± 0.003 h [V08a]
| |
amplitude delta M: |
0.13 [C1383]
0.15 ± 0.05; 0.26 ± 0.26 [V08a]
| |
color index B-V: |
?
| |
color index V-R: |
?
| |
color index R-I: |
?
| |
slope parameter G: |
(0.15) assumed
| |
geometric albedo: |
(0.16)
| |
mass: |
?
| |
density: |
?
| |
type: |
?
|
other data, secondary:
|
diameter: |
0.2 ± 0.1 [I8936]
| |
diameter ratio Ds/Dp: |
(0.4)
>=0.32 [C1383]
| |
component magnitude difference: |
(2.0)
| |
rotation period: |
15.28 ± 0.01 h [C1383]
15.267 ± 0.094 h [V08a]
|
|
--2005 NB7--discovery and notes:
Primary discovered 5 July 2005 by the Catalina Sky Survey; linked to observations from 9 January 2002.
Secondary identified by M. K. Shepard, M. C. Nolan, L. A. M. Benner, J. D. Giorgini, S. J. Ostro, and C. Magri based on radar observations from 11-12 April 2008 from Arecibo Observatory, Puerto Rico; announced 17 April 2008.
See more information and links at
Asteroid/Comet Connection Catchall Catalog page
--Links, more technical:
--Links, less technical:
--Links to ADS abstracts:
© 2008 by Wm. Robert Johnston.
Last modified 28 November 2008.
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