939 Isberga

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939 Isberga
Discovery
Discovered by K. Reinmuth
Discovery site Heidelberg
Discovery date 4 October 1920
Designations
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)
Aphelion 2.6449 AU (395.67 Gm)
Perihelion 1.8501 AU (276.77 Gm)
2.2475 AU (336.22 Gm)
Eccentricity 0.17683
3.37 yr (1230.7 d)
189.16°
0° 17m 33.072s / day
Inclination 2.5864°
327.137°
5.9622°
Earth MOID 0.839058 AU (125.5213 Gm)
Jupiter MOID 2.69786 AU (403.594 Gm)
Jupiter Tisserand parameter 3.608
Physical characteristics
2.9173 h (0.12155 d)
12.14

939 Isberga is an S-type asteroid belonging to the Flora family of main-belt asteroids. It was discovered from Heidelberg on 4 October 1920 by Karl Wilhelm Reinmuth. As was his common practice, Reinmuth gave the asteroid a girl's 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]

References[edit]

  1. ^ "939 Isberga (1920 HR)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 2 May 2016. 
  2. ^ Lutz D. Schmadel, Dictionary of Minor Planet Names, 5th edtn. (2003), p.83.

External links[edit]