07345-2100 DON 188 (Alp Gem)

Coord 2000	07345-2100		Discov num	DON 188		Comp			Coord arcsec 2000	07 34 28.09 -21 00 18.0
Date first	1932		Date last	1991		Obs	7
Pa first	308		Pa last	311.2		P.A. Now (θ)	311.2°
Sep first	0.7		Sep last	0.8		Sep. Now (ρ)	0.8"
Mag pri	10.26		Mag sec	10.32		delta mag (ΔM)	0.06		Spectral class	B9.5IV/V (blue-white)
Pri motion ra	-003		Sec motion ra	-003
Pri motion dec	+007		Sec motion dec	+007
Notes

Nature of this double is uncertain.

Name	Alp Gem		Var name	YY Gem		Constellation	Puppis		SAO	174021
HIP	36850		Tycho2	5991-02180-1		Gaia DR2	5620105890991236608		HD	60179
HR	2891		ADS	6175		BD	BD+32 1581		Bayer	Alpha Geminorum
Bayer name	Alp Gem		Flamsteed	66 Geminorum		Flamsteed name	66 Gem		Distance	15.6
Distance ly	50.89		Bayer greek	α Gem

Bayer or Flamsteed indentifiers not always match the correct constellation because of procession and proper motion of the star. (Gem vs Pup)