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C/2018 V1 (Machholz–Fujikawa–Iwamoto)

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(Redirected from C/2018 V1 (Machholz-Fujikawa-Iwamoto)) Comet

C/2018 V1 (Machholz–Fujikawa–Iwamoto)
Path of comet across sky, with 7-day motion shown
Discovery
Discovered byDonald Machholz
Discovery date7 November 2018
Orbital characteristics
Epoch 16 November 2018
Observation arc37 days
Perihelion0.386954 AU
Eccentricity1.00040
Orbital period (sidereal)ejection
(barycentric epoch 2050)
Mean anomaly-0.00057
Inclination143.9878°
Longitude of ascending node128.7222°
Argument of perihelion88.7749°
Earth MOID0.115002 AU
Physical characteristics
Apparent magnitude28.0
This article is about the comet with a hyperbolic trajectory. For a different comet that passed by Earth in February 2019, see C/2018 Y1 (Iwamoto).

Comet C/2018 V1 (Machholz–Fujikawa–Iwamoto) is a minor body that follows a slightly hyperbolic orbit (eccentricity > 1, 16.4-sigma). It was visually discovered on 7 November 2018 by Donald Machholz using an 18.5-inch reflecting telescope and it reached perihelion on 3 December 2018.

Overview

It was estimated to be between 8 and 10th magnitude from mid-November to mid-December 2018, visible in a small telescope. The value of its total (absolute magnitude of comet and coma) magnitude is 14.6 mag. It was discovered by three amateur astronomers: by an observer in Colfax, California, USA and by two observers in Japan. The observations by three astronomers result in the name for the comet, Machholz-Fujikawa-Iwamoto. The current orbit determination of this comet is based on 750 observations with a 37-day observation arc.

Comet C/2018 V1 has a significant probability (72.6%) of having an extrasolar provenance although an origin in the Oort Cloud cannot be excluded. As the present-day value of its barycentric orbital eccentricity is greater than 1, this comet is currently escaping from the Solar System, aiming for interstellar space.

  • Perihelion in early December 2018, above the orbit of Mercury Perihelion in early December 2018, above the orbit of Mercury
  • Animation of C/2018 V1's orbit   Sun ·   Mercury  ·   Venus ·   Earth ·   Mars ·   C/2018 V1 Animation of C/2018 V1's orbit
      Sun ·   Mercury  ·   Venus ·   Earth ·   Mars ·   C/2018 V1

See also

References

  1. ^ "Small-Body Database Lookup".
  2. ^ Dickinson, David (16 November 2018). "New Comet V1 Machholz-Fujikawa-Iwamoto Takes Observers by Surprise". Universe Today. Retrieved 16 November 2018.
  3. Phillips, Tony (14 November 2018). "Amateur Astronomers Discover a Bright New Comet". Spaceweather.com. Retrieved 16 November 2018.
  4. Chambó, José J. (14 November 2018). "New comet C/2018 V1 Machholz-Fujikawa-Iwamoto". Sky & Telescope. Retrieved 16 November 2018.
  5. ^ de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (11 October 2019). "Comet C/2018 V1 (Machholz-Fujikawa-Iwamoto): dislodged from the Oort Cloud or coming from interstellar space?". Monthly Notices of the Royal Astronomical Society. 489 (1): 951–961. arXiv:1908.02666. Bibcode:2019MNRAS.489..951D. doi:10.1093/mnras/stz2229.

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