(2313) Aruna
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Asteroid (2313) Aruna |
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| Properties of the orbit ( animation ) | |
| Orbit type | Inner main belt asteroid |
| Asteroid family | Hertha family |
| Major semi-axis | 2.4579 AU |
| eccentricity | 0.18859 |
| Perihelion - aphelion | 1.9943 AU - 2.9214 AU |
| Inclination of the orbit plane | 1.8392 ° |
| Length of the ascending node | 229.6373 ° |
| Argument of the periapsis | 108.4044 ° |
| Time of passage of the perihelion | November 30, 2018 |
| Sidereal period | 3.85 a |
| Mean orbital velocity | 19.00 km / s |
| Physical Properties | |
| Medium diameter | 15.056 km (± 0.114) |
| Albedo | 0.045 (± 0.003) |
| Rotation period | 8.900 (± 0.114) h |
| Absolute brightness | 13.0 likes |
| history | |
| Explorer | Henry Lee Giclas |
| Date of discovery | October 15, 1976 |
| Another name | 1976 TA , 1949 TE, 1972 RA 1 , 1980 QB |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . The affiliation to an asteroid family is automatically determined from the AstDyS-2 database . Please also note the note on asteroid items. | |
(2313) Aruna is a main inner belt asteroid discovered by US astronomer Henry Lee Giclas on October 15, 1976 at Lowell Observatory ( IAU code 690) in Flagstaff , Arizona . The asteroid had been sighted before: in October 1949 under the provisional designation 1949 TE at the State Observatory in Heidelberg-Königstuhl and in September 1972 (1972 RA 1 ) at the Crimean Observatory in Nautschnyj .
The mean diameter of the asteroid was calculated to be about 15 kilometers. With an albedo of 0.045 (± 0.003) it has a very dark surface.
The rotation period was determined by Andy Monson and Steven Kipp on October 17 and 18, 2003 at the 51 cm DFM Cassegrain telescope in the Andreas Observatory of Minnesota State University, Mankato, to be 8,900 (± 0.114) h. (2313) Aruna was observed during the observations during a conjunction with the asteroid (1645) Waterfield .
(2313) Aruna belongs to the Polana family (named after (142) Polana ), a subgroup of the Nysa group (named after (44) Nysa ). The Nysa group is also called the Hertha family (after (135) Hertha ). What all members of the families and groups mentioned have in common is that the orbits around the sun are in 2: 1 resonance with those of the planet Mars and are therefore stable over a longer period of time. The timeless (non- osculating ) orbital elements of (2313) Aruna are almost identical to those of the smaller one, assuming the absolute brightness of 13.0 compared to 17.8, asteroids 2006 UR 7 .
(2313) Aruna was named after Aruna on February 6, 1993 at the suggestion of the American astronomer Frederick Pilcher , in Indian mythology the brother of Garuda . On the same day, the asteroid (2307) Garuda was named after Garuda .
Web links
- (2313) Aruna in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2313) Aruna in the Small-Body Database of the Jet Propulsion Laboratory of NASA at the California Institute of Technology (Caltech) in Pasadena , California (English)
- Discovery Circumstances of (2313) Aruna according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ Observations by (2313) Aruna on minorplanetcenter.net (English)
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↑ Andy Monson, Steven Kipp: ROTATIONAL PERIODS OF ASTEROIDS 1165 IMPRINETTA , 1299 MERTONA , 1645 WATERFIELD, 1833 SHMAKOVA , 2313 ARUNA AND (13856) 1999 XZ105 . In: The Minor Planet Bulletin, Vol. 31, page 71f, 2004 ( online at adsabs.harvard.edu as PDF , 127 kB; English)
The light curve with corrected image , ibid, page 97 (PDF, 298kB; English) - ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)