It has been seen on every apparition since then. With a period of about seven years, it has been seen close to its perihelia in 1954, 1962, 1969, 1976, 1983, 1991, and 2006.[4] Its orbital period changed from 7.2 to 7.6 years when it passed 0.04 AU from Jupiter in April, 1974.[5] It typically gets no brighter than about magnitude 17.[4][6]
In 1998/1999, it was unexpectedly bright. When recovered on July 21, 1998, by Alain Maury, he expected it to be about magnitude 21 or 22. Instead, he found it to be thousands of times brighter at magnitude 12.2. The next night, its brightness was estimated by others at magnitude 10.9 to 11.8. It may have had a second outburst about 80 days before perihelion. It finally faded to dimmer than magnitude 12 by the end of March, 1999.[4][6]
At its return in 2006, it returned to normal brightness.[7]
^Syuichi Nakano (2011-10-30). "52P/Harrington-Abell (NK 2137)". OAA Computing and Minor Planet Sections. Retrieved 2012-02-18.
^"Horizons Batch for 52P/Harrington-Abell (90000603) on 2029-May-10" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved 2022-06-18. (JPL#K212/18 Soln.date: 2022-Jun-08)
^ abcd Kazuo Kinoshita. "Cometography: 52P/Harrington-Abell". Gary W. Kronk. from the original on 17 May 2011. Retrieved June 10, 2011.
harrington, abell, periodic, comet, solar, system, 1998discoverydiscovered, byrobert, harringtongeorge, abelldiscovery, datemarch, 1955designationsalternative, designations1954, xiii, 1962, 1969, 1976, viii, 1983, xvii, 1991, xorbital, characteristicsepochmarc. 52P Harrington Abell is a periodic comet in the Solar System 52P Harrington Abell52P Harrington Abell in 1998DiscoveryDiscovered byRobert G HarringtonGeorge O AbellDiscovery dateMarch 22 1955DesignationsAlternative designations1954 XIII 1962 II 1969 III 1976 VIII 1983 XVII 1991 XOrbital characteristicsEpochMarch 6 2006Aphelion5 932 AUPerihelion1 757 AUSemi major axis3 844 AUEccentricity0 5429Orbital period7 538 aInclination10 2204 Last perihelionOctober 5 2021 1 March 7 2014 2 August 14 2006Next perihelion2029 May 10 3 It was discovered by Robert G Harrington and George O Abell in 1955 on plates from the Palomar Sky Survey taken with the 49 inch Samuel Oschin telescope 4 It has been seen on every apparition since then With a period of about seven years it has been seen close to its perihelia in 1954 1962 1969 1976 1983 1991 and 2006 4 Its orbital period changed from 7 2 to 7 6 years when it passed 0 04 AU from Jupiter in April 1974 5 It typically gets no brighter than about magnitude 17 4 6 In 1998 1999 it was unexpectedly bright When recovered on July 21 1998 by Alain Maury he expected it to be about magnitude 21 or 22 Instead he found it to be thousands of times brighter at magnitude 12 2 The next night its brightness was estimated by others at magnitude 10 9 to 11 8 It may have had a second outburst about 80 days before perihelion It finally faded to dimmer than magnitude 12 by the end of March 1999 4 6 At its return in 2006 it returned to normal brightness 7 References Edit 52P Harrington Abell Orbit Minor Planet Center Retrieved 2014 06 16 Syuichi Nakano 2011 10 30 52P Harrington Abell NK 2137 OAA Computing and Minor Planet Sections Retrieved 2012 02 18 Horizons Batch for 52P Harrington Abell 90000603 on 2029 May 10 Perihelion occurs when rdot flips from negative to positive JPL Horizons Retrieved 2022 06 18 JPL K212 18 Soln date 2022 Jun 08 a b c d Kazuo Kinoshita Cometography 52P Harrington Abell Gary W Kronk Archived from the original on 17 May 2011 Retrieved June 10 2011 Kronk Gary W Meyer Maik 2010 Cometography Volume 5 1960 1982 A Catalog of Comets Cambridge University Press p 471 ISBN 978 0 521 87226 3 a b BAA Comet Section Periodic Comets British Astronomical Association Retrieved June 10 2011 Seiichi Yoshida 52P Harrington Abell 2006 Archived from the original on 14 May 2011 Retrieved June 10 2011 External links EditOrbital simulation from JPL Java Horizons Ephemeris 52P Harrington Abell Seiichi Yoshida aerith net Numbered cometsPrevious51P Harrington 52P Harrington Abell Next53P Van Biesbroeck This comet related article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title 52P Harrington Abell amp oldid 1093729952, wikipedia, wiki, book, books, library,
