Green comet closest to Earth on 1st February 2023. When and where to watch in India. The comet is characterised by a greenish tinge around its nucleus and tadpole-type tail that extends millions of kilometers in open space. The comet is characterised by a greenish tinge around its nucleus and tadpole-type tail that extends millions of kilometers in open space. The comet is coming into the skies above Earth after completing its orbit around the Sun in the early weeks of January 2023 and is currently on an outbound journey to the edge of the solar system.