Comet
Borrelly
TypeComet
Mass~2 × 10¹³ kg
Diameter8 km
Orbital Radius540 million km
Orbital Period2,593 days
Known Moons0
Surface Gravity~0.0001 m/s²
Average Temp-70 °C
AtmosphereH2O, CO2 (coma)
Discovered ByAlphonse Borrelly
Discovery Year1904
About Borrelly
Its bowling-pin nucleus was resolved by Deep Space 1 in 2001, among the earliest close-up images of a comet. Discovered in 1904 and observed at dozens of returns.
More Comets
Comet
Halley
The most famous comet, visible from Earth every 75-79 years. Last appeared in 19...
2,680 million km from the SunCometHale-Bopp
One of the brightest comets of the 20th century, visible to the naked eye for 18...
28,600 million km from the SunCometChuryumov-Gerasimenko
Comet 67P, famous for being visited by ESA Rosetta mission (2014-2016). Rosetta ...
518 million km from the SunCometNeowise
A spectacular comet visible to the naked eye in July 2020. Discovered by NASA NE...
4,500 million km from the Sun