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66P/du Toit
Discovery
Discovered by	Daniel du Toit at Boyden Observatory, South Africa
Discovery date	16 May 1944
Orbital characteristics
Aphelion	10.7302 AU
Perihelion	1.2742 AU
Semi-major axis	6.0235 AU
Eccentricity	0.788
Orbital period	14.78 yr
Inclination	18.70°
Last perihelion	2018 May 19
Next perihelion	2033-Apr-18

66P/du Toit is a periodic comet in the Solar System with a current orbital period of 14.78 years.^[4] It came to perihelion on 2018 May 19 at roughly apparent magnitude 12.^[2]

It was discovered by Daniel du Toit at the Boyden Observatory, South Africa on 16 May 1944, who estimated its brightness at magnitude 10. Other observers estimated magnitude 11 and 12.5. Its next return date was calculated to have a perihelion date of 10 April 1959 but it was not discovered.

The 1974 return was found almost accidentally with a perihelion date of 1 April 1974 and a brightness of magnitude 18–19. The 1989 appearance was again missed. The 2003 appearance had a perihelion date of 27 August 2003 and a brightness of magnitude 20.^[5]

References

^ MPC
^ ^a ^b Seiichi Yoshida (2007-04-19). "66P/du Toit". Seiichi Yoshida's Comet Catalog. Retrieved 2017-03-02.
^ "Horizons Batch for 66P/du Toit (90000687) on 2033-Apr-18" (Perihelion occurs when rdot flips from negative to positive). JPL Horizons. Archived from the original on 2022-06-27. Retrieved 2022-06-27. (JPL#K184/8 Soln.date: 2019-Jun-03)
^ "66P/du Toit". Gary W. Kronk's Cometography. Retrieved 25 November 2014.
^ "66P/Du Toit". Retrieved 25 November 2014.