17340-7808 RST 3093 AB (HD 157512)

17^h 33^m 59.78^s -78° 08' 08.1" P.A. 246.00 sep 0.4 mag 8.85,9.52 Sp A4V

Coord 2000	17340-7808		Discov num	RST3093		Comp	AB		Coord arcsec 2000	17 33 59.78 -78 08 08.1
Date first	1933		Date last	1991		Obs	3
Pa first	243		Pa last	245.9		P.A. Now (θ)	245.9°
Sep first	0.3		Sep last	0.44		Sep. Now (ρ)	0.44"
Mag pri	8.85		Mag sec	9.52		delta mag (ΔM)	0.67		Spectral class	A4V (white)
Pri motion ra	-004		Sec motion ra	-004
Pri motion dec	-011		Sec motion dec	-011
Notes

Nature of this double is uncertain.

17340-7808 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 157512	257508	17 33 60 -78 08 08	RST 3093 AB	1991	3	246	0.4	8.85	9.52	0.67		<===
Show		257508	17 33 60 -78 08 08	HJ 4937 AB,C	2000	4	223	34.7	9.35	12.84	3.49
Show		257508	17 33 60 -78 08 08	DAW 217 AB,D	2000	3	185	31.8	8.47	14.80	6.33

Quadruple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 157512		Constellation	Apus		SAO	257508		Tycho2	9448-01415-1
Gaia DR2	5776856494885384448		HD	157512