(702) Alauda and S/2007 (702) 1

compiled by Wm. Robert Johnston
last updated 29 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: 3.19235834 AU
orbital period P: 5.70 y (=2083.36747 d)
eccentricity e: 0.02225503
perihelion distance q: 3.1213123 AU
aphelion distance Q: 3.26340437 AU
inclination i: 20.611544°
argument of perihelion omega: 352.4506°
ascending node OMEGA: 289.96636°
mean anomaly M: 12.19288°
perihelion passage TP: 2007-01-29.438
Epoch: 10 APR 2007
data arc: 1910-2007 (726 obs.)

orbital data, secondary:
semimajor axis a: (separation 900 km) [C1016]
semimajor axis/primary radius a/Rp: (9?)
orbital period P: (~3 d?)
eccentricity e: ?

other data, primary:
diameter: 194.7 ± 3.2 km [IR]
absolute magnitude H: 7.25 [JPL]
rotation period: 8.36 h [JPL]
amplitude delta M: ?
color index B-V: 0.665 ± 0.022 [JPL]
color index U-B: 0.316 ± 0.014 [JPL]
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) assumed
geometric albedo: (0.058)
mass: ?
density: ?
type: B (SMASSII) [C1016]

other data, secondary:
diameter: (~6 km)
diameter ratio Ds/Dp: (0.03) [C1016]
component magnitude difference: (7.7) [C1016]
rotation period: ?

--(702) Alauda--discovery and notes:

Primary discovered 16 July 1910 by J. Helffrich from Heidelberg. Alternate designation 1910 KQ.

Companion discovered by P. Rojo and J. L. Margot on 26 July 2007 using the ESO Very Large Telescope (adaptive optics) on Cerro Paranal, Chile; reported 2 August 2007.

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2007, 2008 by Wm. Robert Johnston.
Last modified 29 November 2008.
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