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47P/Ashbrook–Jackson

From Wikipedia, the free encyclopedia
Periodic comet

47P/Ashbrook–Jackson
Comet Ashbrook–Jackson photographed by theHubble 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[1]
  • 1948 IX, 1956 II, 1963 VI
  • 1971 III, 1978 XIV
  • 1986 II, 1993 XIII
Orbital characteristics[3][4]
Epoch21 November 2025 (JD 2461000.5)
Observation arc77.10 years
Number of
observations		3,703
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 perihelion10 June 2017
Next perihelion28 October 2025[2]
TJupiter2.907
EarthMOID1.811 AU
JupiterMOID0.016 AU
Physical characteristics
Mean diameter
5.6 km (3.5 mi)[5]
15.6±0.1 hours[6]
  • (V−R) =0.45±0.03[7]
  • (R−I) =0.38±0.03[7]
Comet total
magnitude (M1)		13.5

47P/Ashbrook–Jackson is aperiodiccomet in theSolar System.

Thecomet nucleus is estimated to be 5.6 kilometers in diameter.[3]

History

[edit]

Comet 47P/Ashbrook–Jackson was discovered byJoseph Ashbrook andCyril Jackson in 1948.

Name

[edit]

47p is in the name because it was the 47th periodic comet discovered. Ashbrook–Jackson is the names of its two discoverers.

Apparitions

[edit]
  • October 28, 2025
  • June 10, 2017
  • January 31, 2009
  • January 6, 2001
  • July 14, 1993
  • January 24, 1986
  • August 19, 1978
  • March 13, 1971
  • October 2, 1963
  • April 6, 1956
  • October 4, 1948

References

[edit]
  1. ^"Comet Names and Designations".International Comet Quarterly. Retrieved7 August 2025.
  2. ^"Horizons Batch for 47P/Ashbrook-Jackson (90000557) on 2025-Oct-28" (Perihelion occurs when rdot flips from negative to positive).JPL Horizons.Archived from the original on 27 June 2022. Retrieved28 September 2025. (JPL#K254/15 Soln.date: 2025-Sep-23)
  3. ^ab"47P/Ashbrook–Jackson – JPL Small-Body Database Lookup".ssd.jpl.nasa.gov.Jet Propulsion Laboratory. Retrieved1 March 2010.
  4. ^"47P/Ashbrook–Jackson Orbit".Minor Planet Center. Retrieved2 March 2017.
  5. ^P. L. Lamy; I. Toth; Y. R. Fernández; H. A. Weaver (2004)."The Sizes, Shapes, Albedos, and Colors of Cometary Nuclei"(PDF).Comets II. pp. 223–264.JSTOR j.ctv1v7zdq5.22.
  6. ^R. Kokotanekova; C. Snodgrass; P. Lacerda; S. F. Green; S. C. Lowry; et al. (2017)."Rotation of cometary nuclei: new light curves and an update of the ensemble properties of Jupiter-family comets".Monthly Notices of the Royal Astronomical Society.471 (3):2974–3007.arXiv:1707.02133.Bibcode:2017MNRAS.471.2974K.doi:10.1093/mnras/stx1716.
  7. ^abC. Snodgrass; S. C. Lowry; A. Fitzsimmons (2006)."Photometry of cometary nuclei: rotation rates, colours and a comparison with Kuiper Belt Objects".Monthly Notices of the Royal Astronomical Society.373 (4):1590–1602.arXiv:astro-ph/0610301.Bibcode:2006MNRAS.373.1590S.doi:10.1111/j.1365-2966.2006.11121.x.

External links

[edit]


Numbered comets
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46P/Wirtanen		47P/Ashbrook–JacksonNext
48P/Johnson
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