47P/Ashbrook–Jackson

For other comets of the same name, see Comet Jackson.

47P/Ashbrook–Jackson
Comet Ashbrook–Jackson photographed by the Hubble Space Telescope on 26 July 2000
Discovery
Discovered byJoseph Ashbrook
Cyril V. Jackson
Discovery siteLowell Observatory, USA
Johannesburg, S. Africa
Discovery date26 August 1948
Designations
P/1948 Q1, P/1955 H1
  • 1948 IX, 1956 II, 1963 VI
  • 1971 III, 1978 XIV
  • 1986 II, 1993 XIII
Orbital characteristics
Epoch21 November 2025 (JD 2461000.5)
Observation arc77.24 years
Number of
observations		3,985
Aphelion5.43 AU
Perihelion2.807 AU
Semi-major axis4.12 AU
Eccentricity0.3180
Orbital period8.35 years
Inclination13.039°
356.88°
Argument of
periapsis		357.92°
Mean anomaly2.83°
Last perihelion28 October 2025
Next perihelion2034
TJupiter2.907
Earth MOID1.811 AU
Jupiter MOID0.016 AU
Physical characteristics
Mean diameter
5.6 km (3.5 mi)
Mean density
0.01±0.01 g/cm3
15.6±0.1 hours
  • (V−R) = 0.45±0.03
  • (R−I) = 0.38±0.03
Comet total
magnitude (M1)		13.5

47P/Ashbrook–Jackson is a Jupiter-family comet with an 8.35-year orbit around the Sun. It is the only comet discovered by Joseph Ashbrook and the third and final one by Cyril V. Jackson.


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