18500+1519 LLO 16 AC

Coord 2000	18500+1519		Discov num	LLO  16		Comp	AC		Coord arcsec 2000	18 50 02.00 +15 18 40.3
Date first	1999		Date last	2001		Obs	2
Pa first	19		Pa last	18.7		P.A. Now (θ)	18.7°
Sep first	11.3		Sep last	11.09		Sep. Now (ρ)	11.09"
Mag pri	5.99		Mag sec	13.30		delta mag (ΔM)	7.31		Spectral class	F8 (yellow-white)
Pri motion ra	+102		Sec motion ra
Pri motion dec	+131		Sec motion dec
Notes	N U K (See Notes, Proper motion indicates non-physical, K-band or other infrared magnitudes)

Visually invisible, K-band or other infrared star : Summary line gives K-band or other infrared (>1 micron) magnitudes This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 174457	104160	18 50 02 +15 18 40	YSC 12 AB	2019	19	35	0.5	7.60	11.30	3.70	Y
Show		104160	18 50 02 +15 18 40	LLO 16 AC	2001	2	19	11.1	5.99	13.30	7.31		<===
Show		104160	18 50 02 +15 18 40	LLO 16 AD	2015	4	225	15.7	5.99	13.50	7.51

Quadruple system
4 estimated visually detectable stars in this system

Constellation	Hercules		SAO	104160		HIP	92418		Tycho2	1584-00540-1
Gaia DR2	4507523307652284288		HD	174457		BD	BD+15 3584		Distance	53.22
Distance ly	173.6