18187-1345 SNA 89 AC

Coord 2000	18187-1345		Discov num	SNA  89		Comp	AC		Coord arcsec 2000	18 18 40.09 -13 45 18.5
Date first	2012		Date last	2012		Obs	1
Pa first	249		Pa last	249.1		P.A. Now (θ)	249.1°
Sep first	5.1		Sep last	5.12		Sep. Now (ρ)	5.12"
Mag pri	6.71		Mag sec	14.14		delta mag (ΔM)	7.43		Spectral class	O7II (blue)
Pri motion ra	-000		Sec motion ra
Pri motion dec	+001		Sec motion dec
Notes	K (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 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		161304	18 18 40 -13 45 18	SNA 89 AB	2012	1	344	5.1	6.71	14.57	7.86
Show		161304	18 18 40 -13 45 18	SNA 89 AC	2012	1	249	5.1	6.71	14.14	7.43		<===
Show	NSV10543	161304	18 18 40 -13 45 18	SNA 89 AD	2012	1	206	5.5	6.71	11.34	4.63
Show		161304	18 18 40 -13 45 18	SNA 89 AE	2012	1	241	6.2	6.71	13.43	6.72

Quintuple system
5 estimated visually detectable stars in this system

Var name	NSV10543		Constellation	Serpens		SAO	161304		Tycho2	6269-04010-1
Gaia DR2	4146612494169472256		HD	168021		HR	6848		ADS	11240
DM	BD-18 4896