Back C/2020 F3 (NEOWISE) AN سي/2020 أف 3 (نيووايز) Arabic C/2020 F3 (NEOWISE) Byelorussian C/2020 F3 (NEOWISE) BE-X-OLD C/2020 F3 (NEOWISE) Catalan کلکداری نیووایز CKB C/2020 F3 (NEOWISE) Czech C/2020 F3 (NEOWISE) Welsh C/2020 F3 (NEOWISE) German C/2020 F3 Greek

Comet NEOWISE

This article is about the "Great Comet of 2020". For other comets discovered by the Wide-field Infrared Survey Explorer satellite, see Comet WISE and NEOWISE.

C/2020 F3 (NEOWISE)
(Great Comet of 2020)
Comet NEOWISE photographed from Germany on July 14, 2020
Discovery[1]
Discovered byNEOWISE
Discovery dateMarch 27, 2020
Designations
CK20F030
Orbital characteristics[2][3]
EpochJuly 6, 2020 (JD 2459036.5)
Observation arc1.2 years (438 days)
Number of
observations		1,315
Aphelion538 AU (inbound)
710 AU (outbound)
Perihelion0.295 AU
Semi-major axis270 AU (inbound)
355 AU (outbound)
Eccentricity0.99921
Orbital period~4,500 yrs (inbound)
~6,800 yrs (outbound)
Inclination128.94°
61.010°
Argument of
periapsis		37.279°
Mean anomaly0.0003°
Last perihelion3 July 2020
TJupiter−0.408
Earth MOID0.362 AU
Jupiter MOID0.813 AU
Physical characteristics[1]
Dimensions~5.0 km (3.1 mi)
7.58±0.03 hours
Comet total
magnitude (M1)		7.5–12.1
0.5–1.0
(2020 apparition)

C/2020 F3 (NEOWISE) or Comet NEOWISE is a long period comet with a near-parabolic orbit discovered on March 27, 2020, by astronomers during the NEOWISE mission of the Wide-field Infrared Survey Explorer (WISE) space telescope. At that time, it was an 18th-magnitude object, located 2.0 AU (300 million km; 190 million mi) away from the Sun and 1.7 AU (250 million km; 160 million mi) away from Earth.[4]

NEOWISE is known for being the brightest comet in the northern hemisphere since Comet Hale–Bopp in 1997.[5] It was widely photographed by professional and amateur observers and was even spotted by people living near city centers and areas with light pollution.[6] While it was too close to the Sun to be observed at perihelion, it emerged from perihelion around magnitude 0.5 to 1, making it bright enough to be visible to the naked eye.[7] Under dark skies, it could be seen with the naked eye and remained visible to the naked eye throughout July 2020.[8][9] By July 30, the comet was about magnitude 5,[10] when binoculars were required near urban areas to locate the comet.

For observers in the Northern Hemisphere, the comet could be seen on the northwestern horizon, below the Big Dipper. North of 45 degrees north, the comet was visible all night in mid-July 2020. On July 30, Comet NEOWISE entered the constellation of Coma Berenices, below the bright star Arcturus.

NEOWISE was retroactively dubbed the Great Comet of 2020.

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  4. ^ Cite error: The named reference MPEC_2020-G05 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference natgeo1 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference NYT-20200729 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference astronow1 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference earthsky1 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Yoshida1 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference COBS was invoked but never defined (see the help page).

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