Astronomy:939 Isberga
From HandWiki
| Discovery | |
|---|---|
| Discovered by | K. Reinmuth |
| Discovery site | Heidelberg |
| Discovery date | 4 October 1920 |
| Designations | |
| (939) Isberga | |
| 1920 HR; 1930 QP; 1957 QE; 1957 UU | |
| Orbital characteristics[1] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 95.52 yr (34889 days) |
| |{{{apsis}}}|helion}} | 2.6449 astronomical unit|AU (395.67 Gm) |
| |{{{apsis}}}|helion}} | 1.8501 AU (276.77 Gm) |
| 2.2475 AU (336.22 Gm) | |
| Eccentricity | 0.17683 |
| Orbital period | 3.37 yr (1230.7 d) |
| Mean anomaly | 189.16° |
| Mean motion | 0° 17m 33.072s / day |
| Inclination | 2.5864° |
| Longitude of ascending node | 327.137° |
| 5.9622° | |
| Physical characteristics | |
| Rotation period | 2.9173 h (0.12155 d) |
| Absolute magnitude (H) | 12.14 |
939 Isberga is a background asteroid from the inner asteroid belt near the region of the Flora family. It was discovered from Heidelberg on 4 October 1920 by Karl Wilhelm Reinmuth. As was his common practice, Reinmuth gave the asteroid a feminine name without reference to any specific person.[2]
Isberga rotates quickly, with a period of 2.9173 hours. It is also suspected to be a binary asteroid, due to a second periodicity observed in its lightcurve from 24 Feb to 4 Mar 2006. The secondary object has an orbital period of 26.8 hours, but its size is undetermined. [1][yes|permanent dead link|dead link}}]
References
- ↑ "939 Isberga (1920 HR)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=939;cad=1.
- ↑ Lutz D. Schmadel, Dictionary of Minor Planet Names, 5th edtn. (2003), p.83.
External links
- Asteroids with Satellites, Robert Johnston, johnstonsarchive.net
- Asteroid Lightcurve Database (LCDB), query form (info )
- 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
- 939 Isberga at AstDyS-2, Asteroids—Dynamic Site
- 939 Isberga at the JPL Small-Body Database
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