(249541) Steinem
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Asteroid (249541) Steinem |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Eos family |
| Major semi-axis | 3.0538 AU |
| eccentricity | 0.0932 |
| Perihelion - aphelion | 2.7692 AU - 3.3384 AU |
| Inclination of the orbit plane | 9.5041 ° |
| Length of the ascending node | 275.0007 ° |
| Argument of the periapsis | 350.1316 ° |
| Time of passage of the perihelion | November 2, 2020 |
| Sidereal period | 5.34 a |
| Mean orbital velocity | 17.01 km / s |
| Physical Properties | |
| Medium diameter | 5.257 (± 0.153) km |
| Albedo | 0.058 (± 0.010) |
| Absolute brightness | 15.3 mag |
| history | |
| Explorer | WISE |
| Date of discovery | April 19, 2010 |
| Another name | 2010 HR 25 |
| 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. | |
(249541) Steinem is an asteroid located in the outer main belt that was discovered by the Wide-Field Infrared Survey Explorer ( IAU code C51) on April 19, 2010, an unmanned space telescope operated by NASA that began operations in January 2010.
The mean diameter of the asteroid was calculated to be 5.257 (± 0.153) km and the albedo to be 0.058 (± 0.010). It can therefore be assumed that (249551) stones have a dark surface.
(249541) Steinem belongs to the Eos family, a group of asteroids, which typically have large semiaxes from 2.95 to 3.1 AU , bounded inward by the Kirkwood gap of the 7: 3 resonance with Jupiter , and orbital inclinations between 8 ° and 12 °. The group is named after the asteroid (221) Eos . The family is believed to have emerged from a collision more than a billion years ago.
The timeless (not osculating ) orbital elements of (249541) Steinem are almost identical to those of twelve other asteroids, for example (51812) 2001 OE 7 , (105227) 2000 PO 5 and (128,745) 2,004 RO 170 .
(249541) Steinem was named on February 22, 2016 after the American feminist , journalist and suffragette Gloria Steinem (* 1934). The Venus crater Gloria, on the other hand, was named after Gloria as a Portuguese first name in 1985 .
Web links
- (249541) Steinem in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (249541) Steinem 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 by (249541) Steinem according to the Minor Planet Center of the International Astronomical Union at the Harvard-Smithsonian Center for Astrophysics in Cambridge , Massachusetts (English)
Individual evidence
- ↑ Proper Elements from (249541) Steinem in the AstDyS-2 database (English)
- ↑ David Vokrouhlický , Miroslav Brož , Alessandro Morbidelli , William Bottke , David Nesvorný , Daniel Lazzaro, Andy Rivkin: Yarkovsky footprints in the Eos family . ( PDF , 26.156 MB; English)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ↑ The Venus crater Gloria in the Gazetteer of Planetary Nomenclature of the IAU (WGPSN) / USGS (English)