(1313) Berna

compiled by Wm. Robert Johnston
last updated 11 June 2006

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: 2.6588214 AU
orbital period P: 4.3355 y (=1583.6 d)
eccentricity e: 0.2066792
perihelion distance q: 2.1092983 AU
aphelion distance Q: 3.20834448 AU
inclination i: 12.52003°
argument of perihelion omega: 99.23952°
ascending node OMEGA: 298.50638°
mean anomaly M: 183.71993°
perihelion passage TP: 2007-10-02.412646
Epoch: 18 AUG 2005
data arc: 1933-1999 (94 obs.)

orbital data, secondary:
semimajor axis a: 9.6 to 24.8 km [B06c]
semimajor axis/primary radius a/Rp: 2.23 ± 0.10 [B06c]
orbital period P: 25.464 ± 0.001 h [B06c]
eccentricity e: ?

other data, primary:
diameter: (15.2 ± 6.2 km) [B06c]
absolute magnitude H: 11.8 [JPL]
rotation period: 25.464 ± 0.001 h [B06c]
amplitude delta M: 0.28 ± 0.02, 0.75 ± 0.05 [B06c]
color index B-V: ?
color index V-R: ?
color index R-I: ?
slope parameter G: (0.15) [a]
geometric albedo: ?
mass: (25 to 426)x1013 kg [B06c]
density: 1.22 ± 0.15 g/cm3 [B06c]
type: ?

other data, secondary:
diameter: (15.2 ± 6.2 km)? [B06c]
diameter ratio Ds/Dp: ~1? [I8292]
component magnitude difference: (~0?)
rotation period: ?

--(1313) Berna--discovery and notes:

Discovered 24 August 1933 by S. J. Arend from Uccle. Additional designations 1933 QG, A911 OA, 1926 EA.

Secondary identified based on lightcurve observations 6-12 February 2004 by Rene Roy, S. Sposetti, N. Waelchli, D. Pray, N. Berger, C. Demeautis, D. Matter, R. Durkee, A. Klotz, D. Starkey, V. Cotrez, and R. Behrend; reported 12 February 2004 (by IAUC on 23 February 2004).

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

--Links, more technical:

--Links, less technical:

--Links to ADS abstracts:


© 2004-2005, 2006 by Wm. Robert Johnston.
Last modified 11 June 2006.
Return to Home. Return to Astronomy and Space. Return to Asteroids with Satellites.