C/2021 J1 (Maury-Attard)

C/2021 J1 (Maury-Attard) is a Halley-type comet discovered on May 9, 2021, by French amateur astronomers Alain Maury and Georges Attard[3][4] with the MAP (Maury/Attard/Parrott) observation program.[5][6] It is the first comet discovered with the synthetic tracking technique (using TYCHO software). When it was discovered, it had a magnitude of 19.

C/2021 J1 (Maury-Attard)
Discovery
Discovered byA. Maury
G. Attard
Discovery date2021-05-09
Orbital characteristics A
Observation arc29 days
Perihelion1.74 AU[1]
Eccentricity0.933
Orbital period135±2 years
Inclination92.7°
Last perihelion19 February 2021
Next perihelionmid-2152?[2]

It only has a 29 day observation arc.[1] It came to perihelion on 19 February 2021. It can be crudely estimated that the next perihelion will occur around mid-2152, but by then the position of the comet along its orbit will have a 3-sigma uncertainty of 1 billion km (6.7 AU).[2]

References
  1. "JPL Small-Body Database Browser: C/2021 J1 (Maury-Attard)". Jet Propulsion Laboratory. Retrieved September 30, 2021.
  2. "Horizons Batch for C/2021 J1 (Maury-Attard) around 2152" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Retrieved October 1, 2021. (JPL#3/Soln.date: 2021-Sep-04)
  3. "ALPO COMET NEWS FOR MAY 2021". Cloudy Nights. Retrieved July 13, 2021.
  4. "New Comet C/2021 J1 (Maury-Attard)". Comet Observation Database.
  5. Feldmann, Jean-Baptiste. "C/2021 J1 Maury-Attard, la comète française inespérée". CIELMANIA : le blog de Jean-Baptiste FELDMANN, photographe du ciel. Retrieved July 13, 2021.
  6. "MAP history and description". San Pedro de Atacama Celestial Explorations. Retrieved July 13, 2021.
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