C/1979 Y1 (Bradfield)

C/1979 Y1 (Bradfield)
	Negative image of the comet on 6 February 1980
Discovery
Discovered by	William A. Bradfield
Discovery date	24 December 1979
Designations
Alternative designations	1979l, 1979X
Orbital characteristics
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°
Longitude of; ascending node	103.22°
Argument of; periapsis	257.61°
Last perihelion	21 December 1979
Next perihelion	≈2287?
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]

^ "IAUC 3437: 1979l; 1979 YA; 1979 XA; Occn OF SAO 80950 BY (9)". www.cbat.eps.harvard.edu. Retrieved 10 March 2023.
^ ^a ^b Cite error: The named reference Horizons2287 was invoked but never defined (see the help page).
^ "Small-Body Database Lookup: C/1979 Y1 (Bradfield)". ssd.jpl.nasa.gov.

[IAUC3437-1] "IAUC 3437: 1979l; 1979 YA; 1979 XA; Occn OF SAO 80950 BY (9)". www.cbat.eps.harvard.edu. Retrieved 10 March 2023.

[Horizons2287-2] Cite error: The named reference Horizons2287 was invoked but never defined (see the help page).

[3] "Small-Body Database Lookup: C/1979 Y1 (Bradfield)". ssd.jpl.nasa.gov.

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