105P/Singer Brewster
Periodic comet with 6 year orbit
From Wikipedia, the free encyclopedia
105P/Singer Brewster is a periodic comet in the Solar System. It was discovered in 1986, and received the name of 1986d under the old naming system.[5]
| |
| Discovery | |
|---|---|
| Discovered by | Stephen Singer-Brewster |
| Discovery date | May 3, 1986 |
| Designations | |
| 1986 XI; 1992 XXVI | |
| Orbital characteristics | |
| Epoch | 2011-Feb-08 (JD 2455600.5) |
| Aphelion | 4.8915 AU |
| Perihelion | 2.0502 AU |
| Semi-major axis | 3.4709 AU |
| Eccentricity | 0.40929 |
| Orbital period | 6.47 yr |
| Inclination | 9.1706° |
| Last perihelion | 2025-Jan-22[1] 2018-Aug-10[1] February 26, 2012[2][3] September 11, 2005 |
| Next perihelion | 2031-Jul-11[4] |
Because 105P/Singer Brewster only comes within 2 AU of the Sun,[6] during the 2012 perihelion passage it is only expected to brighten to about apparent magnitude 17.[7]
The comet nucleus is estimated to be 2.2 kilometers in diameter.[6]
The orbit of Comet Singer Brewster was altered significantly in August 1976 when it passed within 0.376 AU of Jupiter and will be altered again in August 2059.[8][9]
The single discoverer bears a hyphenated surname (Singer-Brewster), but co-discovered comets bear the names of the co-discoverers linked by hyphens, e.g. Shoemaker-Levy 9, Swift-Tuttle, etc. In these cases, the IAU either removes one of the parts of the name or replaces the hyphen by a space.[10][11]