(11116) 1996 EK

compiled by Wm. Robert Johnston
last updated 12 June 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: 2.1965489 AU
orbital period P: 3.26 y (=1,189.08 d)
eccentricity e: 0.2256189
perihelion distance q: 2.1965489 AU
aphelion distance Q: 1.7009660 AU
inclination i: 7.74430°
argument of perihelion omega: 76.86531°
ascending node OMEGA: 149.93660°
mean anomaly M: 351.96396°
perihelion passage TP: 2009-JUL-14.54
Epoch: 18 JUN 2009
data arc: 1955-2009 (559 obs.)

orbital data, secondary:
semimajor axis a: (15 km?)
semimajor axis/primary radius a/Rp: (6?)
orbital period P: 51.31 ± 0.1 h [HH]
eccentricity e: ?

other data, primary:
diameter: (5 km?)
absolute magnitude H: 14.2 [JPL]
rotation period: 4.4018 ± 0.0001 h [OO]
amplitude delta M: 0.10 [OO]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.20) assumed
mass: ?
density: ?
type: ?

other data, secondary:
diameter: ?
diameter ratio Ds/Dp: ?
component magnitude difference: ?
rotation period: ?

--(11116) 1996 EK--discovery and notes:

Primary discovered 10 March 1996 by S. Ueda and H. Kaneda at Kushiro Observatory; subsequently linked to pre-discovery observations from 1955. Alternate designation 1990 RU10.

Companion suggested based on lightcurve observations from Hunters Hill, Santana, and GMARS observatories from 4 June-13 July 2006; further lightcurve observations obtained 4 March-4 April 2009, announced April 2009. Detection is considered marginal.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2009 by Wm. Robert Johnston.
Last modified 12 June 2009.
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