Comet Lulin Comes Closer
Comet Lulin will be on its closest approach (.41 AU) to earth on 24th February. It will not be much bright though (Max. magnitude 4.0 - 5.0). Still on a dark sky you may be able to spot it as a white splotch against the black sky. Look for it in the constellation Leo [ skymap ]. It will lie only a few degrees from saturn. The comet actually looks green through powerful telescopes. This is because, its gassy atmosphere, of the size of Jupiter, contains cyanogen(CN) and diatomic carbon(C 2 ), both glow green in sunlight.