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C/1989 Y1 (Skorichenko–George)

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(Redirected from C/1989 Y1) Non-periodic comet
C/1989 Y1 (Skorichenko–George)
Discovery
Discovered byBoris Skoritchenko
Douglas B. George
Discovery date17 December 1989
Designations
Alternative designations1990 VI
1989e1
Orbital characteristics
Epoch24 February 1990 (JD 2447946.5)
Observation arc1,008 days (2.76 years)
Number of
observations		106
Aphelion1,188.42 AU
Perihelion1.569 AU
Semi-major axis594.994 AU
Eccentricity0.997363
Orbital period14,514 years
Inclination59.3660
Longitude of
ascending node		279.998°
Argument of
periapsis		137.862°
Last perihelion11 April 1990
Earth MOID0.7346 AU
Jupiter MOID1.8047 AU
Physical characteristics
Comet total
magnitude (M1)		5.3
Comet nuclear
magnitude (M2)		11.9
Apparent magnitude9–10
(1990 apparition)

Comet Skorichenko–George (sometimes spelled Scorichenko–George), formally designated as C/1989 Y1, 1990 VI, and 1989e1, is a non-periodic comet co-discovered by astronomers Boris Skorichenko and Doug George on December 17, 1989. It has a hyperbolic trajectory around the Sun, but still weakly bound to it by its barycenter.

Discovery and observations

It was discovered on December 17, 1989 by Doug George of Kanata (near Ottawa), Ontario, Canada, and Soviet astronomer Boris Skoritchenko (Mezmay, Krasnodar Krai). Skoritchenko was using 8×20 binoculars, whilst George was using a 16" reflector and had searched for 65 hours. The comet was magnitude 10.5 in the northern evening sky. It passed its perihelion on April 11, 1990 at a distance of 1.57 AU (235 million km), and remained visible as a magnitude 9–10 object in the night sky until April 1990

C2 emission bands were observed in the comet Skorichenko-George. Unlike most comets, Skorichenko–George did not produce a tail. Its coma remained consistently diffuse, estimated to be around 190,000–290,000 km (120,000–180,000 mi) in diameter.

References

  1. D. W. Green (19 December 1989). "COMET GEORGE (1989e1)". Central Bureau for Astronomical Telegrams. 4925. Bibcode:1989IAUC.4925....1G.
  2. D. W. Green (23 December 1989). "COMET SKORICHENKO-GEORGE (1989e1)". Central Bureau for Astronomical Telegrams. 4929. Bibcode:1989IAUC.4929....1C.
  3. ^ "C/1989 Y1 (Skorichenko–George) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 15 November 2024.
  4. ^ Horizons output. "Barycentric Osculating Orbital Elements for Comet C/1989 Y1 (Skorichenko-George)". Retrieved 4 February 2011. (Solution using the Solar System Barycenter and barycentric coordinates. Select Ephemeris Type:Elements and Center:@0)
  5. V. Korneyev. "C/1989 Y1 (Skorichenko-George)" (in Russian). Archived from the original on 15 March 2005.
  6. D. Machholz (February 1990). "SAC News: Comet Comments" (PDF). Saguaro Astronomy Club. No. 157. Archived from the original (PDF) on 5 January 2011.
  7. ^ D. Machholz (August 1997). "The apparition of comet Skorichenko-George (1989e1 = 1990 VI)". Strolling Astronomer. 39 (4): 177–189. Bibcode:1997JALPO..39..177M.
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