Discovery[1] | |
---|---|
Discovered by | William A. Bradfield |
Discovery date | 24 December 1979 |
Designations | |
1979l, 1979X | |
Orbital characteristics[3] | |
Epoch | 1980-Jan-25.0 |
Observation arc | 75 days |
Number of observations | 127 |
Aphelion | 91 ± 1 AU |
Perihelion | 0.5453 AU |
Semi-major axis | 46 AU |
Eccentricity | 0.988 |
Orbital period | 308 ± 6 years |
Inclination | 148.60° |
103.22° | |
Argument of periapsis | 257.61° |
Last perihelion | 21 December 1979 |
Next perihelion | ≈2287?[2] |
Earth MOID | 0.067 AU |
Jupiter MOID | 1.69 AU |
Comet total magnitude (M1) | 8.5 |
C/1979 Y1 (Bradfield), also known as Comet 1979X and 1979l, is a long period comet discovered by William A. Bradfield on 24 December 1979. The comet has an orbital period of 308 ± 6 years and last passed perihelion on 21 December 1979. It is considered to be the parent body of the July Pegasids meteor shower. It is expected to next come to perihelion around 2287.[2]
Horizons2287
was invoked but never defined (see the help page).