An object classified as a periodic comet in 1949 when discovered by the American astronomers Albert George Wilson (1918– ) and Robert George Harrington (1904–87), but subsequently found to be identical to asteroid 4015 discovered in 1979. This was the first evidence of a comet evolving into an asteroid-like body. Asteroid 4015 is a member of the Apollo group, and has a diameter of about 4 km. It can approach to within 0.049 AU (7.3 million km) of the Earth's orbit. Its orbit has a semimajor axis of 2.639 AU, period 4.29 years, perihelion 0.991 AU, aphelion 4.29 AU, and inclination 2°.8.
http://cometography.com/pcomets/107p.html Information page at Cometography website.
Subjects: Astronomy and Astrophysics.