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C/2002 X5 (Kudo–Fujikawa)

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C/2002 X5 (Kudo–Fujikawa)
Discovery[1][2]
Discovered byTetuo Kudo
Shigehisa Fujikawa
Discovery siteJapan
Discovery date13–14 December 2002
Designations
CK02X050[3]
Orbital characteristics[4]
Epoch20 January 2003 (JD 2452659.5)
Observation arc129 days
Earliest precovery date6 November 2002
Number of
observations		514
Aphelion~2,390 AU
Perihelion0.189 AU
Semi-major axis~1,200 AU
Eccentricity0.99984
Orbital period~41,200 years
Inclination94.152°
119.07°
Argument of
periapsis		187.58°
Mean anomaly359.99°
Last perihelion29 January 2003
TJupiter–0.035
Earth MOID0.741 AU
Jupiter MOID1.343 AU
Physical characteristics[5][6]
Dimensions3.4–4.0 km (2.1–2.5 mi)
Mean diameter
2.2 km (1.4 mi)
Mass2.3×1012 kg
Comet total
magnitude (M1)		10.6
Comet nuclear
magnitude (M2)		14.9
4.2[7]
(2003 apparition)

Comet Kudo–Fujikawa, formally designated as C/2002 X5, is a non-periodic comet that was visible through binoculars in January 2003. It was discovered by two Japanese astronomers, Tetuo Kudo and Shigehisa Fujikawa.

Discovery and observations

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Tetuo Kudo was the first person to spot the comet when he located it using a pair of 20x135 binoculars on 13 December 2002.[1] The following day, Shigehisa Fujikawa made his independent discovery a day later, marking his sixth overall comet discovery since 1969.[2] At the time of its discovery, the comet was a 9th-magnitude object within the constellation Böotes.[8] Since then, Terry Lovejoy found precovery images that were taken by the SWAN instrument aboard the SOHO spacecraft between 6 and 13 November 2002.[8]

Brian G. Marsden provided the first orbital calculations for the comet on 15 December 2002, where it was initially predicted to reach perihelion on 24 January 2003.[3] Its perihelion date was later revised to 29 January.[9] Between 25 January and 1 February 2003, the comet is within view of the LASCO C3 camera aboard the SOHO spacecraft,[10] allowing measurements of its C2/CN compound ratio emitted to be conducted.[11]

References

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  1. 1 2 D. W. Green (14 December 2002). "Comet 2002 X5". International Astronomical Union Circular. 8032.
  2. 1 2 D. W. Green (16 December 2002). "Comet Kudo-Fujikawa (C/2002 X5)". International Astronomical Union Circular. 8033.
  3. 1 2 B. G. Marsden (15 December 2002). "MPEC 2002-X84: Comet C/2002 X5". www.minorplanetcenter.net. Minor Planet Center. Retrieved 5 February 2025.
  4. ↑ "C/2002 X5 (Kudo–Fujikawa) – JPL Small-Body Database Lookup". ssd.jpl.nasa.gov. Jet Propulsion Laboratory. Retrieved 4 February 2025.
  5. ↑ A. Sosa; J. A. Fernández (2011). "Masses of long-period comets derived from non-gravitational effects" (PDF). Monthly Notices of the Royal Astronomical Society. 416 (1): 767–782. doi:10.1111/j.1365-2966.2011.19111.x.
  6. ↑ D. C. Jewitt (2022). "Destruction of Long-period Comets". Astronomical Journal. 164 (4): 158–166. arXiv:2208.04469. Bibcode:2022AJ....164..158J. doi:10.3847/1538-3881/ac886d.
  7. ↑ "Observation list for C/2002 X5". COBS – Comet OBServation database. Retrieved 4 February 2025.
  8. 1 2 G. W. Kronk. "C/2002 X5 (Kudo–Fujikawa)". Cometography.com. Retrieved 4 February 2025.
  9. ↑ B. G. Marsden (30 December 2002). "MPEC 2002-Y64: Comet C/2002 X5 (Kudo–Fujikawa)". www.minorplanetcenter.net. Minor Planet Center. Retrieved 5 February 2025.
  10. ↑ P. Deans (23 July 2003). "Comet Kudo–Fujikawa Near the Sun". Sky & Telescope. Retrieved 5 February 2025.
  11. ↑ M.R. Combi; Z. Boyd; Y. Lee; T. S. Patel; et al. (2011). "SOHO/SWAN observations of comets with small perihelia: C/2002 V1 (NEAT), C/2002 X5 (Kudo–Fujikawa), 2006 P1 (McNaught) and 96P/Machholz 1". Icarus. 216 (2): 449–461. doi:10.1016/j.icarus.2011.09.019. ISSN 0019-1035.
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