(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:
- Behrend, Raoul, Roy, René, & Sposetti, Stefano 2004, Orion: Zeitschrift für
Amateur-Astronomie Les quatre astéroïdes (1089) Tama et (1313) Berna.
Histoire de deux découvertes magnifiques faites grâce à des amateurs
- Behrend, R., Roy, R., Sposetti, S., Waelchli, N., Pray, D., Berger, N., Demeautis, C., Matter, D., Durkee, R., Klotz, A., Starkey, D., & Cotrez, V. 2004, International Astronomical Union Circular (1313) Berna
- Mammana, L. A. & Orellana, R. B. 1997, Boletin de la Asociacion Argentina de Astronomia La Plata Argentina Búsqueda de asteroides para determinación de masa
- Hilton, James L. 1997, Astronomical Journal The Mass of the Asteroid 15 Eunomia From Observations of 1313 Berna and 1284 Latvia
- Hilton, J. L. 1996, Bulletin of the American Astronomical Society The Mass of 15 Eunomia from Observations of 1284 Latvia and 1313 Berna
© 2004-2005, 2006 by Wm. Robert Johnston.
Last modified 11 June 2006.
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