72P/Denning–Fujikawa

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72P/Denning–Fujikawa
Discovery
Semi-major axis
4.334 AU (a)
Eccentricity0.8191
Orbital period9.02 yr
Inclination9.17°
Last perihelion2023-Jun-15[1]
2014-Jul-11[1]
2005-Jun-20[1]
Next perihelion2032-May-14[2][3]
Earth MOID0.085 AU (12.7 million km)[4]
Physical characteristics
Dimensions2 ± 1 km (uncertain)[5]

72P/Denning–Fujikawa is a

perihelion in June 2023,[1] and will next come to perihelion in May 2032.[2]

There were failures to recover the comet during perihelion even in cases where it is estimated that it should have been around magnitude 8, such as in 1960 and 1969, and it has been suggested since then it is only occasionally active.[5] This has resulted in it being classified as a transitional comet.[5] The comet was seen in 1978 at around magnitude 10. The comet was missed in 1987, 1996, and 2005 as it is now expected that the comet only brightened to about magnitude 13–14 during those passages.[8]

In August 1881 the comet passed 0.116 AU (17.4 million km) from Earth.[3] Between 1855 and 2059 perihelion will gradually be lifted from 0.79 AU to 0.82 AU.

72P/Denning–Fujikawa closest Earth approach on 2190-Nov-28[4]
Date & time of
closest approach 		Earth distance
(AU) 		Sun distance
(AU) 		Velocity
wrt Earth
(km/s) 		Velocity
wrt Sun
(km/s) 		Uncertainty
region
(
3-sigma
) 		Reference
2190-Nov-28 19:13 ± 11 hours 0.126 
LD
)		 0.999 AU (149.4 million km; 92.9 million mi; 389 LD) 18.8 39.7 ± 550 thousand km Horizons

Meteor shower

The 1834 trail of comet 72P/Denning–Fujikawa may come close to Earth on 7 January 2024 20:38 UT, but will need to be detected by radio/radar methods as the radiant will be near the Sun and Beta Capricorni.[9] Meteor showers from 72P are more likely to occur in August or December, with December being a daytime event.[5]

References

  1. ^ a b c d e "72P/Denning-Fujikawa Orbit". Minor Planet Center. Retrieved 2014-06-19.
  2. ^ a b "Horizons Batch for 72P/Denning-Fujikawa (90000727) on 2032-May-14" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 2023-05-03. Retrieved 2023-07-06. (JPL#K236/6/Soln.date: 2023-Jul-05)
  3. ^ a b Kinoshita, Kazuo (2014-06-22). "72P/Denning-Fujikawa past, present and future orbital elements". Comet Orbit. Retrieved 2023-08-09.
  4. ^ a b "JPL Small-Body Database Browser: 72P/Denning-Fujikawa" (last observation: 2023-06-20). Jet Propulsion Laboratory. Retrieved 2023-08-09.
  5. ^
    doi:10.1046/j.1365-8711.2001.04822.x
    .
  6. ^ Kronk, Gary W. "72P/Denning-Fujikawa". Retrieved 2014-06-19. (Cometography Home Page)
  7. IAU Minor Planet Center
    . 2014-06-18. Retrieved 2014-06-19.
  8. ^ Seiichi Yoshida (2023-05-13). "72P/Denning-Fujikawa". Seiichi Yoshida's Comet Catalog. Retrieved 2023-08-09.
  9. ^ "2024 Meteor Shower Calendar" (PDF) (Page 3 Section 3). International Meteor Organization (IMO). Retrieved 2023-08-06.

External links


Numbered comets
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71P/Clark 		72P/Denning–Fujikawa Next
73P/Schwassmann–Wachmann


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