1313 Berna

From Wikipedia, the free encyclopedia
Jump to: navigation, search
1313 Berna
Discovery
Discovered by Sylvain Julien Victor Arend
Discovery date August 24, 1933
Designations
Named after
Bern
A911 OA; 1926 EA; 1933 QG
Main belt
Orbital characteristics
Epoch November 26, 2005 (JD 2453700.5)
Aphelion 479.945 Gm (3.208 AU)
Perihelion 315.311 Gm (2.108 AU)
397.628 Gm (2.658 AU)
Eccentricity 0.207
1582.799 d(4.33 a)
18.07 km/s
206.388°
Inclination 12.523°
298.466°
99.333°
Physical characteristics
Dimensions 13.93 ± 0.64[1] km
Mass (2.25 ± 2.00) × 1015[1] kg
Mean density
1.21 ± 0.14[1] g/cm3
0.0017? m/s²
0.0043? km/s
1.061±0.005 d
Albedo 0.16-0.19
Temperature ~171 K
Spectral type
?
11.8
S/2004 (1313) 1
Discovery
Discovered by R. Behrend, R. Roy, S. Sposetti, N. Waelchli, D. Pray, N. Berger, C. Demeautis, D. Matter, R. Durkee, A. Klotz, D. Starkey, and V. Cotrez
Discovery date 2004/02/06
Light curve
Orbital characteristics
25 km
Eccentricity ?
1.061 ± 0.00004 d
1 day, 1 hour, 27 minutes, 50 ± 3 seconds
30 mas (maximum)
Satellite of 1313 Berna
Physical characteristics
Dimensions 8.37 km
Volume 307 km3 (assumed)
0.51 fainter than primary
12.8-13.0

1313 Berna is an asteroid orbiting the Sun. It is named after the city of Berne, in Switzerland.

A satellite, designated S/2004 (1313) 1, was identified based on lightcurve observations 6–12 February 2004 by René Roy, Stefano Sposetti, Nicolas Waelchli, Donald P. Pray, Nathanaël Berger, Christophe Demeautis, Daniel Matter, Russell I. Durkee, Alain Klotz, Donn R. Starkey, Vincent Cotrez, and Raoul Behrend. This was announced on 12 February 2004 (although the IAUC announcement only came on 23 February 2004). The moon, estimated to be 11 km across, orbits about 35 km from its primary in 1.061 ± 0.00004 days.[2]

References[edit]

  1. ^ a b c Carry, B. (December 2012), "Density of asteroids", Planetary and Space Science 73: 98–118, arXiv:1203.4336, Bibcode:2012P&SS...73...98C, doi:10.1016/j.pss.2012.03.009.  See Table 1.
  2. ^ Johnston, Robert. "(131) Berna". johnstonsarchive.net. Retrieved 28 May 2015. 

External links[edit]