452P/Sheppard-Jewitt (0452P)

Type: Periodic Perihelion date: 25 April 2023 Perihelion distance (q): 4.2 Aphelion distance (Q) : 10.4 Period (years): 19.7 Eccentricity (e): 0.43 Inclination (i): 6.4 JPL orbit diagram COBS lightcurve 452P/Sheppard-Jewitt = 2003 CC22 = 2022 B5 An asteroid, of 22nd magnitude, was discovered by a team including Scott Sheppard and David Jewitt using the 3.6-m Canada-France- Hawaii and 2.2-m University of Hawaii telescopes on Mauna Kea on 8 February 2003. The orbit is unusual, crossing that of Jupiter and Saturn, both of which it can approach to within 1 au. In October 2022 Michael Kelley reported that 2003 CC22 showed a tail in ZTF images taken on 27 September. Sam Dean then noted that images since at least 2018 showed considerable variation in brightness. The comet passed 0.12 au from Saturn in January 1938 and 0.50 au from Jupiter in June 1947, with more distant passes from Saturn in September 1997 and Jupiter in September 2002. Observations (VEMag = visual equivalent magnitude) Date 10x10 mag Error VEmag Coma ' 28-Jan-23 19.4 0.4 19-Feb-23 19.3 0.4 27-Feb-23 19.4 0.4 12-Mar-23 19.8 0.4