Terry's Sky Notes
MARCH NIGHT SKY - This month the constellations of Auriga and Leo
(As seen from Welwyn Garden City at 21:00 on Wed 13th March)
Auriga – The Charioteer (west south-west)
Capella (α Aur) – A quadruple star system comprised of 2 binary pairs, around 43 ly away. (RA 05h 17m Dec +45° 59̕).
Pair 1: Aa A blue-white sub-giant, spec.type K0 III and Ab yellow giant type G1 III.
Pair 2: H red dwarf spec.type M2.5V and L red dwarf spec.type M4.
Leo – (The Lion) (south)
Regulus (α Lionis) – Another quadruple star system (RA 10h 12m Dec +11° 59̕) about 80 ly away.
Star Aa: A blue-white sub-giant spec.type B7W and 3.5 x mass of the Sun.
Star Ab: A white dwarf main sequence star spec.type K2 V about 0.8 x the mass of the Sun.
Stars Ac & Ad are cool red dwarfs which periodically flare.