(7088) Ishtar

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: 1.98111738502699 AU
orbital period P: 2.7885 y (=1,018.5 d)
eccentricity e: 0.38986847880355
perihelion distance q: 1.20874216379525 AU
aphelion distance Q: 2.75349261 AU
inclination i: 8.29448266185195°
argument of perihelion omega: 354.58861833125°
ascending node OMEGA: 102.752370663692°
mean anomaly M: 28.0087683385922°
perihelion passage TP: 2005-12-16.7580323
Epoch: 6 MAR 2006
data arc: 1981-2006 (290 obs.)

orbital data, secondary:
semimajor axis a: (3 km?)
semimajor axis/primary radius a/Rp: (4?)
orbital period P: 20.65±0.02 h [OOf]
eccentricity e: ?

other data, primary:
diameter: (1.5 km?)
absolute magnitude H: 16.7 [JPL]
rotation period: 2.6790±0.0002 [OOf]
amplitude delta M: 0.11 [OOf]
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: (0.6 km?)
diameter ratio Ds/Dp: 0.42 ± 0.02 [C384]
component magnitude difference: (1.9)
rotation period: ?

--(7088) Ishtar--discovery and notes:

Primary discovered 1 January 1992 by C. S. Shoemaker and E. M. Shoemaker from Palomar Observatory, California, USA. Alternate designation 1992 AA.

Secondary discovered by V. Reddy, R. Dyvig, P. Pravec, P. Kusnirak, S. Gajdos, A. Galad, and L. Kornos based on lightcurve observations from 23-29 January 2006, announced 31 January 2006.

See more information and links at Asteroid/Comet Connection Catchall Catalog page

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2006, 2008 by Wm. Robert Johnston.
Last modified 23 November 2008.
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