(11116) 1996 EK

compiled by Wm. Robert Johnston
last updated 6 December 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 [HHa]
eccentricity e: ?

other data, primary:
diameter: (5 km?)
absolute magnitude H: 14.2 [JPL]
rotation period: 4.4018 ± 0.0001 h [OOf]
amplitude delta M: 0.10 [OOf]
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 6 December 2009.
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