(120347) Salacia and Actaea

compiled by Wm. Robert Johnston
last updated 3 November 2012

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: 41.9697 AU
orbital period P: 271.90 y (=90,312.3 d)
eccentricity e: 0.109071
perihelion distance q: 37.3920 AU
aphelion distance Q: 46.5474 AU
inclination i: 23.920°
argument of perihelion omega: 309.461°
ascending node OMEGA: 280.008°
mean anomaly M: 107.849°
perihelion passage TP: 1925-04-07.9
Epoch: 22 SEP 2006
data arc: 1982-2005 (29 obs.)

orbital data, secondary:
semimajor axis a: 5,619 ± 87 km [S12b]
semimajor axis/primary radius a/Rp: (12)
orbital period P: 5.49380 ± 0.00016 d [S12b]
eccentricity e: 0.0084 ± 0.0076 [S12b]
inclination i: ?

other data, primary:
diameter: 905 ± 103 km [S12b]
absolute magnitude H: 4.4 [JPL]
rotation period: 6.09/12.18 h or 8.01/16.02 h [T09a]
amplitude delta M: 0.03±0.01 [T09a]
color index B-V: ?
color index V-R: ?
color index R-I: ?
color index R-J: ?
color index J-H: ?
color index H-K: ?
slope parameter G: (0.15) assumed
geometric albedo: 0.0357 +0.0103/-0.0072 [S12b]
mass: (4.66 ± 0.22)x1020 kg [S12b]
density: 1.16 +0.59/-0.36 g/cm3 [S12b]
type: ?

other data, secondary:
diameter: 303 ± 35 km [S12b]
diameter ratio Ds/Dp: ()
component magnitude difference: 2.37 ± 0.06 [S12b]
rotation period: ?

--(120347) Salacia--discovery and notes:

Primary discovered 22 September 2004 by H. G. Roe, M. E. Brown, and K. M. Barkume from Palomar Observatory. Linked to prediscovery observations from 1982. Alternate designation 2004 SB60. Name assigned 18 February 2011.

Companion discovered by K. S. Noll, H. F. Levison, D. C. Stephens, and W. M. Grundy from Hubble Space Telescope observations on 21 July 2006, reported 19 September 2006. Provisional designation S/2006 (120347) 1; name assigned 18 February 2011.

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2006-2011, 2012 by Wm. Robert Johnston.
Last modified 3 November 2012.
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