16054-1948 PWL 9001 AD

16^h 05^m 26.23^s -19° 48' 19.4" P.A. 30.00 sep 518.2 mag 2.62,7.50 Sp B0.5V+B9V dist. 123.92 pc (404.23 l.y.)

Coord 2000	16054-1948		Discov num	PWL9001		Comp	AD		Coord arcsec 2000	16 05 26.23 -19 48 19.4
Date first	1860		Date last	1998		Obs	3
Pa first	31		Pa last	30.4		P.A. Now (θ)	30.4°
Sep first	520.4		Sep last	518.23		Sep. Now (ρ)	518.23"
Mag pri	2.62		Mag sec	7.50		delta mag (ΔM)	4.88		Spectral class	B0.5V+B9V (blue-white/blue-white)
Pri motion ra	-007		Sec motion ra	-008
Pri motion dec	-025		Sec motion dec	-027
Notes	N (See Notes)

rPM=0.079 (< 0.3, Physical double)

This double is physical.

16054-1948 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		159682	16 05 26 -19 48 19	OCC 9158 Aa,Ab	1976	0	-1	0.0	2.90	4.10	1.20	Y
Show		159682	16 05 26 -19 48 19	BU 947 AB	2021	46	219	0.3	2.62	10.60	7.98	Y
Show	Acrab	159682	16 05 26 -19 48 19	H 3 7 AC	2019	142	20	13.4	2.59	4.52	1.93
Show		159682	16 05 26 -19 48 19	PWL 9001 AD	1998	3	30	518.2	2.62	7.50	4.88		<===
Show		159683	16 05 27 -19 48 07	MCA 42 CE	2021	30	61	0.1	4.52	6.60	2.08	Y

Sextuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Common name	Acrab		Var name	NSV7424 Sco		Constellation	Scorpius		SAO	159682
HIP	78820		Tycho2	6208-01623-1		Gaia DR2	6247207266936828288		HD	144217
HR	5984		GC	21613		ADS	9913		BD	BD-19 4307
CP	CP-19 5945		Bayer	Beta 1 Scorpii		Bayer name	Bet1 Sco		Flamsteed	8 Scorpii
Flamsteed name	8 Sco		FK5	597		Distance	123.92		Distance ly	404.23
Bayer greek	β¹ Sco

Other names

Graffias, Grafias, Akrab, Elacrab

Meaning

the scorpion