16540-4148 SNA 51 Aa,Ab

Coord 2000	16540-4148		Discov num	SNA  51		Comp	Aa,Ab		Coord arcsec 2000	16 54 01.84 -41 48 23.0
Date first	2011		Date last	2011		Obs	1
Pa first	153		Pa last	153.2		P.A. Now (θ)	153.2°
Sep first	0.0		Sep last	0.001		Sep. Now (ρ)	0.001"
Mag pri	5.10		Mag sec	7.00		delta mag (ΔM)	1.9		Spectral class	B0.5Ia (blue-white)
Pri motion ra	-003		Sec motion ra
Pri motion dec	-002		Sec motion dec
Notes	N V K (See Notes, Proper motion indicates 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 physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		227377	16 54 02 -41 48 23	SNA 51 Aa,Ab	2011	1	153	0.0	5.10	7.00	1.90		<===
Show	HD 152234	227377	16 54 02 -41 48 23	B 1833 AB	2006	8	75	0.5	5.65	7.92	2.27
Show		227377	16 54 02 -41 48 23	B 1833 AC	2015	2	99	5.4	5.65	13.80	8.15
Show		227377	16 54 02 -41 48 23	SEE 293 AD	1999	4	127	19.1	5.66	13.70	8.04
Show		227377	16 54 02 -41 48 23	SEE 293 AE	1999	5	281	20.5	5.66	13.00	7.34
Show		227377	16 54 02 -41 48 23	JC 23 AF	2018	15	19	56.7	5.65	6.56	0.91
Show		227380	16 54 04 -41 47 30	SNA 51 Fa,Fb	2014	16	54	0.0	6.30	8.30	2.00	Y
Show		227380	16 54 04 -41 47 30	SEE 294 FG	2015	5	47	6.7	6.59	13.00	6.41
Show		227380	16 54 04 -41 47 30	HJ 4892 FH	2015	13	300	8.8	6.59	9.60	3.01

Decuple system
8 estimated visually detectable stars in this system

Constellation	Scorpius		SAO	227377		HIP	82676		Tycho2	7876-02191-1
Gaia DR2	5966510057279631488		HD	152234		HR	6260		CD	CD-4111024
CP	CP-41 7716		Distance	793.65		Distance ly	2588.89