2005 NB7

compiled by Wm. Robert Johnston
last updated 17 April 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: ?
semimajor axis/primary radius a/Rp: >=0.6 km [I8936]
orbital period P: ?
eccentricity e: ?

other data, primary:
diameter: 0.5 ± 0.1 km [I8936]
absolute magnitude H: 18.933 ± 0.545 [JPL]
rotation period: >=2.5 h [I8936]
amplitude delta M: ?
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: ?
geometric albedo: ?
mass: ?
density: ?
type: ?

other data, secondary:
diameter: 0.2 ± 0.1 [I8936]
diameter ratio Ds/Dp: (0.4)
component magnitude difference: ?
rotation period: ?

--2005 NB7--discovery and notes:

Primary discovered 2005; 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: