(2889) Brno
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Asteroid (2889) Brno |
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|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | Main outer belt asteroid |
| Asteroid family | Eos family |
| Major semi-axis | 3.0226 AU |
| eccentricity | 0.1158 |
| Perihelion - aphelion | 2.6727 AU - 3.3725 AU |
| Inclination of the orbit plane | 9.4846 ° |
| Length of the ascending node | 220.2050 ° |
| Argument of the periapsis | 124.3749 ° |
| Time of passage of the perihelion | December 9, 2017 |
| Sidereal period | 5.26 a |
| Mean orbital velocity | 17.13 km / s |
| Physical Properties | |
| Rotation period | 9.51 h (± 30%) |
| Absolute brightness | 11.5 likes |
| history | |
| Explorer | Antonin Mrkos |
| Date of discovery | 17th November 1981 |
| Another name | 1981 WT 1 , 1953 JE, 1958 GE, 1970 SF 1 , 1976 UO 4 , 1983 AB 1 , 1984 HN 2 |
| 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. | |
(2889) Brno is an asteroid of the main outer belt that was discovered on November 17, 1981 by the Czech astronomer Antonín Mrkos at the Kleť observatory ( IAU code 046) near Český Krumlov . There were previously unconfirmed sightings of the asteroid in May 1953 (1953 JE) at the Goethe Link Observatory in Indiana , on April 15, 1958 (1958 GE) at the State Observatory in Heidelberg-Königstuhl , and on September 30, 1970 (1970 SF 1 ) and on October 28, 1976 (1976 UO 4 ) at the Crimean Observatory in Nautschnyj .
The rotation period of (2889) Brno was provisionally determined by René Roy at the Geneva observatory on November 10, 2012 to be 9.51 hours. However, due to insufficient data, this information has an inaccuracy of 30 percent.
The asteroid 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 (non- osculating ) orbital elements of (2889) Brno are almost identical to those of the two smaller ones, assuming the absolute magnitude of 14.8 and 15.7 compared to 11.3, asteroids (116882) 2004 FO 118 and ( 214821) 2006 PY 16 .
(2889) Brno after the city Brno named ( Czech Brno ). The name was given by the International Astronomical Union (IAU) on November 29, 1993. More than 100 years earlier, in 1892, an asteroid had already been named after Brno, which in 1890 discovered (290) Bruna .
Web links
- (2889) Brno in the database of the "Asteroids - Dynamic Site" (AstDyS-2, English).
- (2889) Brno in the Small-Body Database of the Jet Propulsion Laboratory (English).
Individual evidence
- ↑ (2889) Brno at the IAU Minor Planet Center (English)
- ^ Periods of rotation of asteroids and comets (French)
- ↑ David Vokrouhlický , Miroslav Brož , Alessandro Morbidelli , William Bottke , David Nesvorný , Daniel Lazzaro, Andy Rivkin: Yarkovsky footprints in the Eos family (English, PDF ,; 26 MB)
- ↑ The family status of the asteroids in the AstDyS-2 database (English, HTML; 51.4 MB)
- ↑ Entry of the asteroid on the website of the Kleť Observatory (English)