33P/Daniel

Infobox Comet
name=33P/Daniel
caption=
discoverer=Zaccheus Daniel
discovery_date=December 7, 1909
designations=1909 X1, 1937 B1
epoch=June 25, 2000
aphelion=
perihelion=2.1572385 AU
semimajor=4.0216611 AU
semiminor=
orbital_circ=
eccentricity=0.4635952
period=8.065 a
avg_speed=
max_speed=
min_speed=
inclination=22.41°
last_p=June 23, 2000
next_p=July 20, 2008

Comet Daniel is a periodic comet in the solar system discovered by Zaccheus Daniel (Halsted Observatory, Princeton University, New Jersey, USA) on December 7, 1909 estimated as magnitude 9.

Following its discovery, the returns for 1916, 1923, and 1930 were predicted but on each occasion it was not recovered.

The 1937 return was recovered by Shin-ichi Shimizu (Simada, Japan) on January 31 after a calculation of the comet's orbit by Hidewo Hirose (Tokyo, Japan) after he took calculations for the 1923 return done by Alexander D. Dubiago and took into account perturbations from Jupiter.

All returns apart from 1957 and 1971 have been recovered.

Repeated close encounters with Jupiter have increased this comet's orbital period steadily since it was first discovered, it will likely increase again to 8.29 years when it next encounters Jupiter on December 2, 2018.

External links

* [http://cometography.com/pcomets/033p.html 33P at Kronk's Cometography]
* [http://www9.ocn.ne.jp/~comet/pcmtn/0033p.htm 33P at Kazuo Kinoshita's Comets]
* [http://www.aerith.net/comet/catalog/0033P/index.html 33P at Seiichi Yoshida's Comet Catalog]