(99913) 1997 CZ5

compiled by Wm. Robert Johnston
last updated 21 February 2011

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: 2.2944514 AU
orbital period P: 3.48 y (=1,269.453 d)
eccentricity e: 0.3966529
perihelion distance q: 1.3843506 AU
aphelion distance Q: 3.2045522 AU
inclination i: 24.89189°
argument of perihelion omega: 169.12127°
ascending node OMEGA: 288.05195°
mean anomaly M: 17.28432°
perihelion passage TP: 2010-DEC-09.051
Epoch: 08 FEB 2011
data arc: 1992-2009 (455 obs.)

orbital data, secondary:
semimajor axis a: ?
semimajor axis/primary radius a/Rp: ?
orbital period P: 14.68 ± 0.01 h [C2648]
eccentricity e: ?

other data, primary:
diameter: (7 km?)
absolute magnitude H: 13.6 [JPL]
rotation period: 2.83507 ± 0.00002 h [C2648]
amplitude delta M: 0.19 ± 0.02; 0.033-0.042 ± 0.02 [C2648]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.16) assumed
mass: ?
density: ?
type: S [JPL]

other data, secondary:
diameter: ?
diameter ratio Ds/Dp: 0.19 ± 0.02 [C2648]
component magnitude difference: ?
rotation period: ?

--(99913) 1997 CZ5--discovery and notes:

Primary discovered 7 February 1997 by the NEAT program from Haleakala; linked to prediscovery observations from 1992. Alternate designation 1999 NQ54.

Companion reported in February 2011 based on lightcurve observations from 31 December 2010-30 January 2011 by D. Higgins, P. Pravec, P. Kusnirak, K. Hornoch, J. Pollock, W. Cooney, J. Gross, D. Terrell, J. Oey, J. Brinsfield, D. E. Reichart, K. M. Ivarsen, J. B. Haislip, A. LaCluyze, and R. Durkee.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2011 by Wm. Robert Johnston.
Last modified 21 February 2011.
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