C/2019 Y1 (ATLAS)

For other comets discovered by the Asteroid Terrestrial-impact Last Alert System, see Comet ATLAS (disambiguation).

C/2019 Y1 (ATLAS)
Near parabolic orbit has its perihelion above the northern ecliptic
Discovery[1]
Discovered byJ. Robinson
Discovery siteATLAS–HKO (T05)
Discovery date16 December 2019
Designations
A10iMHA[2]
CK19Y010
Orbital characteristics[3]
Epoch12 April 2020
(JD 2458951.5)
Observation arc208 days
Number of
observations		1,010
Aphelion669.1457±3.3432 AU
Perihelion0.838 AU
Semi-major axis~240 AU
Eccentricity0.99651
Orbital period~3,720 years
Inclination73.348°
31.366°
Argument of
periapsis		57.498°
Mean anomaly0.007°
Last perihelion15 March 2020
Earth MOID0.083 AU
Jupiter MOID1.026 AU
Physical characteristics[4]
Dimensions1.2 km (0.75 mi)
Comet total
magnitude (M1)		11.9±1.0
Comet nuclear
magnitude (M2)		13.8±0.5

C/2019 Y1 (ATLAS) is a comet with a near-parabolic orbit discovered by the ATLAS survey on 16 December 2019. It passed perihelion on 15 March 2020 at 0.84 AU from the Sun.[3] Its orbit is very similar to C/1988 A1 (Liller), C/1996 Q1 (Tabur), C/2015 F3 (SWAN) and C/2023 V5 (Leonard), suggesting they may be fragments of a larger ancient comet.[5]

Observations

1 week motion across the sky

The comet passed close to Earth in early May 2020. It was visible in the northern hemisphere sky in the spring of 2020.

References

  1. ^ "MPEC 2020-A72 : Comet C/2019 Y1 (ATLAS)". www.minorplanetcenter.net. Minor Planet Center. 5 January 2020. Retrieved 25 January 2025.
  2. ^ D. W. Green (5 January 2020). "Comet C/2019 Y1 (ATLAS)". Central Bureau for Astronomical Telegrams. 4708.
  3. ^ a b "C/2019 Y1 (ATLAS) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 13 May 2020.
  4. ^ D. C. Jewitt (2022). "Destruction of Long-period Comets". Astronomical Journal. 164 (4): 158–166. arXiv:2208.04469. Bibcode:2022AJ....164..158J. doi:10.3847/1538-3881/ac886d.
  5. ^ D. Dickinson (25 March 2020). "Following Comet Y1 ATLAS: the "Lost Comet" of Spring". Universe Today. Retrieved 14 May 2020.
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