(41) Daphne and S/2008 (41) 1

compiled by Wm. Robert Johnston
last updated 1 April 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: 2.764355496 AU
orbital period P: 4.60 y (=1,678.762524 d)
eccentricity e: 0.27178178
perihelion distance q: 2.0130540 AU
aphelion distance Q: 3.515656957 AU
inclination i: 15.766710°
argument of perihelion omega: 46.32026°
ascending node OMEGA: 178.14775°
mean anomaly M: 354.623621°
perihelion passage TP: 2008-06-08.07129
Epoch: 14 MAY 2008
data arc: 1866-2008 (1043 obs.)

orbital data, secondary:
semimajor axis a: ?
semimajor axis/primary radius a/Rp: ?
orbital period P: ?
eccentricity e: ?

other data, primary:
diameter: 174 ± 12 km [JPL]
absolute magnitude H: 7.12 [JPL]
rotation period: 5.988 h [JPL]
amplitude delta M: ?
color index U-B: 0.363±0.017 [JPL]
color index B-V: 0.726±0.008 [JPL]
color index V-R: ?
color index R-I: ?
slope parameter G: 0.10 [JPL]
geometric albedo: 0.083±0.012 [JPL]
mass: ?
density: ?
type: C, Ch [JPL]

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

--(41) Daphne--discovery and notes:

Primary discovered 22 May 1856 by H. Goldschmidt at Paris. Alternate designation 1949 TG.

Secondary announced 31 March 2008.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:

© 2007, 2008 by Wm. Robert Johnston.
Last modified 1 April 2008.
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