Back مذنب هيكوتيك Arabic Cometa Hyakutake AST C/1996 B2 (Хякутакэ) BE Хякутаке (комета) Bulgarian Cometa Hyakutake Catalan Hjakutakeova kometa Czech C/1996 B2 (Hyakutake) German Κομήτης Χιακουτάκε Greek Cometa Hyakutake Spanish دنباله‌دار هایاکوتاکه FA

Comet Hyakutake

This article is about the "Great Comet of 1996". For the 1995 comet of the same name, see C/1995 Y1 (Hyakutake).
C/1996 B2 (Hyakutake)
(Great Comet of 1996)
Comet Hyakutake photographed by Franz Haar in March 1996
Discovery[1]
Discovered byYuji Hyakutake
Discovery siteJapan
Discovery date31 January 1996
Designations
PronunciationJapanese pronunciation: [çakɯ̥take]
Orbital characteristics[2][3][4]
Epoch15 March 1996 (JD 2450157.5)
Aphelion~1,320 AU (inbound)[a]
~3,500 AU (outbound)
Perihelion0.230 AU
Semi-major axis1,700 AU (outbound)[a]
Eccentricity0.99989
Orbital period~17,000 years (inbound)[a]
~72,000 years (outbound)
Inclination124.922°
188.045°
Argument of
periapsis		130.175°
Last perihelion1 May 1996
TJupiter–0.338
Earth MOID0.101 AU
Jupiter MOID1.991 AU
Physical characteristics[4]
Dimensions4.2 km (2.6 mi)
6 hours
Comet total
magnitude (M1)		7.4
Comet nuclear
magnitude (M2)		11.1
0.0
(1996 apparition)

Comet Hyakutake (formally designated C/1996 B2) is a comet discovered on 31 January 1996.[1] It was dubbed the Great Comet of 1996; its passage to within 0.1 AU (15 Gm) of the Earth on 25 March was one of the closest cometary approaches of the previous 200 years. Reaching an apparent visual magnitude of zero and spanning nearly 80°, Hyakutake appeared very bright in the night sky and was widely seen around the world. The comet temporarily upstaged the much anticipated Comet Hale–Bopp, which was approaching the inner Solar System at the time.

Hyakutake is a long-period comet that passed perihelion on 1 May 1996. Before its most recent passage through the Solar System, its orbital period was about 17,000 years,[2][5] but the gravitational perturbation of the giant planets has increased this period to 70,000 years.[2][5] This is the first comet to have an X-ray emission detected, which is most likely the result of ionised solar wind particles interacting with neutral atoms in the coma of the comet. The Ulysses spacecraft fortuitously crossed the comet's tail at a distance of more than 500 million km (3.3 AU; 310 million mi) from the nucleus, showing that Hyakutake had the longest tail known for a comet.

  1. ^ a b Cite error: The named reference IAUC_6299 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference barycenter was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference ESO_2009 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference jpldata was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference James_1998 was invoked but never defined (see the help page).

Comet Hyakutake

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