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'''C/2020 F3 (NEOWISE)''', or '''Comet NEOWISE''', is a [[Retrograde and prograde motion|retrograde]] [[comet]] with a [[List of near-parabolic comets|near-parabolic]] orbit discovered on March 27, 2020 by the [[Wide-field Infrared Survey Explorer|NEOWISE]] space telescope.<ref name=Yoshida/> It will pass closest to the sun on July 3, 2020. As of 10 June 2020 it was magnitude 7,<ref name=COBS/> and if it survives perihelion {{Convert|0.29|AU|e6km LD|abbr=unit|lk=on}} from the Sun, it is expected to be visible to the naked eye in July.<ref name=Yoshida/> When the comet entered the field of view of [[Solar and Heliospheric Observatory|SOHO]] LASCO C3 on 22 June 2020 the comet had brightened to magnitude 3.<ref name=SOHO>[https://twitter.com/michalkusiak/status/1275071305482563592 SOHO LASCO C3] – Michal Kusiak</ref> The comet will be less than 20 degrees from the Sun from 11 June 2020 until 9 July 2020. Closest approach to Earth will occur 23 July 2020 at a distance of {{Convert|0.69|AU|e6km LD|abbr=unit|lk=on}}.
'''C/2020 F3 (NEOWISE)''', or '''Comet NEOWISE''', is a [[Retrograde and prograde motion|retrograde]] [[comet]] with a [[List of near-parabolic comets|near-parabolic]] orbit discovered on March 27, 2020 by the [[Wide-field Infrared Survey Explorer|NEOWISE]] space telescope.<ref name=Yoshida/> It will pass closest to the sun on July 3, 2020. As of 10 June 2020 it was magnitude 7,<ref name=COBS/> and if it survives perihelion {{Convert|0.29|AU|e6km LD|abbr=unit|lk=on}} from the Sun, it is expected to be visible to the naked eye in July.<ref name=Yoshida/> When the comet entered the field of view of [[Solar and Heliospheric Observatory|SOHO]] [[Large Angle and Spectrometric Coronagraph|LASCO C3]] on 22 June 2020 the comet had brightened to magnitude 3.<ref name=SOHO>[https://twitter.com/michalkusiak/status/1275071305482563592 SOHO LASCO C3] – Michal Kusiak</ref> The comet will be less than 20 degrees from the Sun from 11 June 2020 until 9 July 2020. Closest approach to Earth will occur 23 July 2020 at a distance of {{Convert|0.69|AU|e6km LD|abbr=unit|lk=on}}.


This [[Apsis|perihelion]] passage will increase the comets [[orbital period]] from about 4500 years to about 6800 years.
This [[Apsis|perihelion]] passage will increase the comets [[orbital period]] from about 4500 years to about 6800 years.

Revision as of 15:13, 26 June 2020

C/2020 F3 (NEOWISE)
C/2020 F3 (NEOWISE) orbit on April 19, 2020
Discovery
Discovered byNEOWISE
Discovery dateMarch 27, 2020
Orbital characteristics
Epoch2458953.5 (April 14, 2020)
Number of
observations		353
Aphelion544 AU (inbound)
720 AU (outbound)
Perihelion0.29478 AU
Semi-major axis272 AU (inbound)
360 AU (outbound)
Eccentricity0.99921
Orbital period~4500 yrs (inbound)
~6800 yrs (outbound)[1]
Inclination128.93°
Next perihelionJuly 3, 2020
TJupiter-0.408
Earth MOID0.36 AU (54 million km; 140 LD)
Jupiter MOID0.81 AU (121 million km; 320 LD)

C/2020 F3 (NEOWISE), or Comet NEOWISE, is a retrograde comet with a near-parabolic orbit discovered on March 27, 2020 by the NEOWISE space telescope.[2] It will pass closest to the sun on July 3, 2020. As of 10 June 2020 it was magnitude 7,[3] and if it survives perihelion 0.29 AU (43 million km; 110 LD) from the Sun, it is expected to be visible to the naked eye in July.[2] When the comet entered the field of view of SOHO LASCO C3 on 22 June 2020 the comet had brightened to magnitude 3.[4] The comet will be less than 20 degrees from the Sun from 11 June 2020 until 9 July 2020. Closest approach to Earth will occur 23 July 2020 at a distance of 0.69 AU (103 million km; 270 LD).

This perihelion passage will increase the comets orbital period from about 4500 years to about 6800 years.

References

  1. ^ JPL Horizons barycentric solution for epoch 1950 (before entering planetary region)
    Goto JPL Horizons
    Ephemeris Type: Orbital Elements
    Center: @0 (Solar System Barycenter)
    Time Span: 1950-01-01 to 2050-01-01 and Step Size: 100 years
    1950-Jan-01 is "PR= 1.63E+06 / 365.25 days" = 4462 years
  2. ^ a b Seiichi Yoshida. "C/2020 F3 ( NEOWISE )". Retrieved April 4, 2020.
  3. ^ "Comet Observation database (COBS)". Retrieved May 27, 2020. "C/2020 F3 (NEOWISE) plot"
  4. ^ SOHO LASCO C3 – Michal Kusiak
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