C / 1992 J2 (Bradfield)
| C / 1992 J2 (Bradfield) [i] | |
|---|---|
| Properties of the orbit ( animation ) | |
| Orbit type | parabolic |
| Numerical eccentricity | 1.0 |
| Perihelion | 0.592 AU |
| Inclination of the orbit plane | 158.6 ° |
| Perihelion | May 25, 1992 |
| Orbital velocity in the perihelion | 54.7 km / s |
| history | |
| Explorer | WA Bradfield |
| Date of discovery | May 3, 1992 |
| Older name | 1992 XIII, 1992i |
| Source: Unless otherwise stated, the data comes from JPL Small-Body Database Browser . Please also note the note on comet articles . | |
C / 1992 J2 (Bradfield) is a comet that could only be observed from the southern hemisphere in 1992 .
Discovery and observation
The comet was on the morning of May 4, 1992 (local time) by William A. Bradfield in Australia with a 150 mm - f / 5.5 - Refractor discovered. It was his sixteenth comet discovery, just three months after his last. During this period he had searched for comets for a total of 30 hours. Bradfield estimated the comet's brightness to be about 10 mag.
It could only be seen from the southern hemisphere. As the comet approached the sun , its brightness initially increased, but the last observation was made on June 4th. As a result, the comet could not be found again, possibly it had dissolved.
Orbit
For the comet, only a limited exact parabolic orbit could be determined from 10 observation data over a period of 31 days by Marsden , which is inclined by around 159 ° to the ecliptic . It thus runs in the opposite direction (retrograde) like the planets through its orbit. At the point of the orbit closest to the sun ( perihelion ), which the comet passed on May 25, 1992, it was located at a distance of 88.6 million km from the sun in the area between the orbits of Mercury and Venus . Already on April 2nd it had approached Venus up to about 84.4 million km and the day after Mars up to about 42.0 million km away. On May 18, it came close to the earth to about 0.49 AU / 73.9 million km.
The orbital elements of comet C / 1992 J2 (Bradfield) have a significant similarity with those of comet C / 1590 E1 . They could both have a common origin.
See also
Web links
Individual evidence
- ^ Astronomical Society of South Australia: Comets Discovered from South Australia. Accessed March 2, 2016 .
- ^ JD Shanklin: The comets of 1992. In: Journal of the British Astronomical Association. Vol. 108, No. 2, 1998, pp. 90-98 ( bibcode : 1998JBAA..108 ... 90S ).
- ↑ International Comet Quarterly: Split Comets. Accessed March 2, 2016 .
- ↑ NASA JPL Small-Body Database Browser: C / 1992 J2 (Bradfield). Accessed March 2, 2016 .
- ↑ A. Vitagliano: SOLEX 11.0. Archived from the original on September 18, 2015 ; accessed on May 2, 2014 .
- ↑ L. Neslušan and M. Jakubík: The tidal action of the homogeneous field of Galactic-disc matter and population of the outer Oort cloud. In: Contributions of the Astronomical Observatory Skalnaté Pleso. Vol. 34, 2004, pp. 87-104 ( bibcode : 2004CoSka..34 ... 87N ).