42981 Jenniskens
Encyclopedia
42981 Jenniskens is a main belt asteroid
Asteroid
Asteroids are a class of small Solar System bodies in orbit around the Sun. They have also been called planetoids, especially the larger ones...

 with an orbital period
Orbital period
The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of...

 of 1475.3877052 days (4.04 years).

The asteroid was discovered on October 2, 1999 at Ondrejov Observatory
Ondrejov Observatory
The Ondřejov Observatory is the principal observatory of the Astronomical Institute of the Academy of Sciences of the Czech Republic. It is located near the village of Ondřejov, 35 km southeast of Prague....

, Czech Republic, by Petr Pravec
Petr Pravec
Petr Pravec is a Czech astronomer, born in Třinec, a prolific discoverer of binary asteroids using lightcurve photometric studies. He is leading the effort of a large consortium of stations called BinAst to look for multiplicity in the NEA and inner main-belt populations...

. Originally designated "1999 TY224", the asteroid was subsequently named after astronomer Peter Jenniskens
Peter Jenniskens
Petrus Matheus Marie Jenniskens is a Dutch astronomer and a senior research scientist at the Carl Sagan Center of the SETI Institute and at NASA Ames Research Center. He is an expert on meteor showers. Jenniskens is the author of the 790 page book "Meteor Showers and their Parent Comets"...

, an expert on meteor showers.
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