157P/Tritton

Periodic comet with 6-year orbit 157P/Tritton 157P 2022-09-05 image ZTF-sso-615-zr-fov-4.7arcmin.png Comet 157P/Tritton on 5 September 2022 by ZTF with fragment B visible Keith Tritton February 11, 1978 1977 XIII 2023-02-25 3.545 AU 1.572 AU 5.519 AU 0.5566 6.675 a 12.42° 2022-Sep-09June 10, 2016February 20, 2010 2028-Mar-07 (B)2029-May-18 157P/Tritton is a periodic comet with a 6-year orbital period. Fragment B was first observed on 21 August 2022. Observational history Keith Tritton (U. K. Schmidt Telescope Unit, Coonabarabran) discovered this comet on a deep IIIa-J exposure made with the 122-cm Schmidt telescope on 1978 February 11.66.http://cometography.com/pcomets/157p.html 157P/Tritton 2006-02-22 dead https://web.archive.org/web/20060316031404/http://cometography.com/pcomets/157p.html 2006-03-16 The comet was not detected during the predicted returns of 1984, 1990 or 1996 and was presumed lost. However, on 2003 October 6.44, using CCD images obtained with a 0.12-m refractor, C. W. Juels (Fountain Hills, Arizona, USA) and P. Holvorcem (Campinas, Brazil) detected a comet that proved to be on a similar orbit to the lost comet. B. G. Marsden was able to calculate a new orbit, published in IAU Circular No. 8215, issued 2003 October 7, which confirmed that it was indeed identical to comet Tritton. The comet was also recovered at its 2010, 2016, and 2022 apparitions. On 2 October 2022 the discovery of a new fragment of the comet was published in MPEC 2022-T23. With a smaller orbit, fragment B should come to perihelion in 2028 March and the primary fragment should come to perihelion in 2029 May (2028-03-07 2029-05-18 on later). +Orbital Elements for Epoch 2023-Feb-25 Component Period(years) Perihelion Aphelion(AU) Semi-major axis(AU) Eccentricity Inclination NextPerihelion 157P 6.68 1.572 5.519 3.545 0.5566 12.42° 2029-May-18 157P-B 5.49 1.552 4.671 3.111 0.5012 12.43° 2028-Mar-07 References 157P/Tritton Orbit http://www.minorplanetcenter.net/db_search/show_object?object_id=157P Minor Planet Center https://archive.today/20230430154859/http://www.minorplanetcenter.net/db_search/show_object?object_id=157P 2023-04-30 live 2017-04-09 2012-03-24 157P/Tritton (NK 1900) OAA Computing and Minor Planet Sections Syuichi Nakano Syuichi Nakano http://www.oaa.gr.jp/~oaacs/nk/nk1900.htm 2012-02-25 MPEC 2022-T23 : New Fragment of comet 157P/TRITTON IAU Minor Planet Center 2022-10-02 https://minorplanetcenter.net/mpec/K22/K22T23.html 2022-10-19 Horizons Batch for 157P-B/Tritton (90001088) on 2028-Mar-07 JPL Horizons Perihelion occurs when rdot flips from negative to positive https://ssd.jpl.nasa.gov/api/horizons.api?format=text&COMMAND=%27DES%3D157P-B%3BCAP%27&START_TIME=%272028-Mar-05%27&STOP_TIME=%272028-Mar-09%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27 2023-04-29 (JPL#4/Soln.date: 2022-Nov-15 arc: 38 days) Horizons Batch for 157P/Tritton (90001097) on 2029-May-18 JPL Horizons Perihelion occurs when rdot flips from negative to positive https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%2790001097%27&START_TIME=%272029-May-16%27&STOP_TIME=%272029-May-20%27&STEP_SIZE=%273%20hours%27&QUANTITIES=%2719%27 2023-04-29 (Soln.date: 2023-Apr-28) 157P-B @ epoch 2023-Feb-25 JPL Horizons https://ssd.jpl.nasa.gov/horizons_batch.cgi?batch=1&COMMAND=%27157P-B%27&TABLE_TYPE=%27ELEMENTS%27&START_TIME=%272023-02-25%27&STOP_TIME=%272023-05-25%27&STEP_SIZE=%274%20months%27&CENTER=%27@Sun%27&OUT_UNITS=%27AU-D%27 2023-05-01 External links 1000096 1003882 157P/Tritton-B 157P 157P/Tritton at the Minor Planet Center database 157P/Tritton at Seiichi Yoshida's website 157P/Tritton at Gary W. Kronk's Cometography 156P/Russell–LINEAR 158P/Kowal–LINEAR Category:Periodic comets 0157 0157