1313 Berna
| Discovery Synodic rotation period | 25.46 h[13][14][15][16] | |
|---|---|---|
| 0.13[12] 0.169[11] 0.185[7][8][9] 0.212[17] 0.245[6] | ||
| S (assumed)[13] | ||
| 11.55[6] 11.6[1][3][13] 11.69±0.12[17] 11.75[12] 11.80[7][9][11] | ||
1313 Berna, provisional designation 1933 QG, is a background
rotation period of 25.5 hours and is likely elongated in shape.[13] It was named for the Swiss capital of Bern.[1] The discovery of an 11-kilometer-sized companion was announced in February 2004.[a]
Orbit and classification
According to modern
Based on osculating Keplerian
Johannesburg. Its observation arc begins with its official discovery observation at Uccle.[1]
Naming
This
H 120).[2]
Physical characteristics
| Discovery mas (maximum) | |
|---|---|
| Satellite of | 1313 Berna |
| Physical characteristics | |
| Dimensions | 8.37 km[18] |
| Δ0.51 fainter than prim. | |
| 12.8–13.0 | |
Lightcurve
A network of astronomers at several observatories including
U=1/2-/3-).[16]
Asteroid moon
In February 2004, a
IAUC was released on 23 February 2004, the announcement was already made on 12 February 2004. There are several hundreds of asteroids known to have satellites (also see Category:Binary asteroids).[19]
Diameter and albedo
According to the surveys carried out by the Japanese
albedo between 0.13 and 0.25.[6][17][9][8][11][12] The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.21 – derived from 15 Eunomia, the parent body of the Eunomia family – and calculates a diameter of 13.88 kilometers based on an absolute magnitude of 11.6.[13]
Notes
- ^ a b c d International Astronomical Union Circular (No.8292), 23 February 2004 for (1313) BERNA:
"Photometric observations obtained of the minor planet (1313) on eight nights during Feb. 6–16 show a lightcurve amplitude of 0.25 magnitude and suggest that this is a binary system with an orbital period of 1.061 ± 0.005 days, showing mutual eclipses and/or occultations near both rotational lightcurve minima with a duration of about 0.09 day and depth about 0.7 mag, the first being centered on Feb. 7.85 UT. The regular-appearing lightcurve is synchronized with the eclipse events, indicating that at least one of the two bodies is elongated and rotates synchronously with the orbital motion; the sharp eclipse/occultation events indicate that both components have approximately the same size. The maximum orbital separation observed from earth would be about 0".03."
— Reported by R. Behrend, Geneva Observatory, on behalf of R. Roy, S. Sposetti, N. Waelchli, D. Pray, N. Berger, C. Demeautis, D.Matter, R. Durkee, A. Klotz, D. Starkey, and V. Cotrez)
References
- ^ a b c d e f "1313 Berna (1933 QG)". Minor Planet Center. Retrieved 11 December 2018.
- ^ ISBN 978-3-540-00238-3.
- ^ a b c d "JPL Small-Body Database Browser: 1313 Berna (1933 QG)" (2018-05-23 last obs.). Jet Propulsion Laboratory. Retrieved 11 December 2018.
- ^ a b "Asteroid 1313 Berna". Small Bodies Data Ferret. Retrieved 11 December 2018.
- ^ a b "Asteroid (1313) Berna – Proper elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 11 December 2018.
- ^ S2CID 46350317.
- ^ Bibcode:2016PDSS..247.....M. Retrieved 11 December 2018.
- ^ S2CID 118745497.
- ^ )
- ^ S2CID 119226456.
- ^ )
- ^ .
- ^ a b c d e f "LCDB Data for (1313) Berna". Asteroid Lightcurve Database (LCDB). Retrieved 16 January 2017.
- ^ Bibcode:2004IAUC.8292....3B.
- ^ . Retrieved 16 January 2017.
- ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (1313) Berna". Geneva Observatory. Retrieved 16 January 2017.
- ^ S2CID 161887.
- ^ Johnston, Robert. "(131) Berna". johnstonsarchive.net. Retrieved 28 May 2015.
- ^ Wm. Robert Johnston (1 November 2015). "Asteroids with Satellites". Johnston's Archive. Retrieved 24 November 2015.
External links
- IAUC 8292
- Behrend 2005, Four new binary Minor Planets
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info Archived 16 December 2017 at the Wayback Machine)
- Dictionary of Minor Planet Names, Google books
- Asteroids and comets rotation curves, CdR – Observatoire de Genève, Raoul Behrend
- Discovery Circumstances: Numbered Minor Planets (1)–(5000) – Minor Planet Center
- 1313 Berna at AstDyS-2, Asteroids—Dynamic Site
- 1313 Berna at the JPL Small-Body Database
