18118-1825 HJ 2820 AB (HD 166524)

18^h 11^m 46.79^s -18° 22' 52.3" P.A. 279.00 sep 5.8 mag 10.09,11.83 Sp B0?Vpe dist. 512.82 pc (1672.82 l.y.)

Coord 2000	18118-1825		Discov num	HJ 2820		Comp	AB		Coord arcsec 2000	18 11 46.79 -18 22 52.3
Date first	1830		Date last	2015		Obs	12
Pa first	282		Pa last	278.6		P.A. Now (θ)	278.6°
Sep first	3.0		Sep last	5.78		Sep. Now (ρ)	5.78"
Mag pri	10.09		Mag sec	11.83		delta mag (ΔM)	1.74		Spectral class	B0?Vpe (blue-white)
Pri motion ra	+004		Sec motion ra	-005
Pri motion dec	-002		Sec motion dec	-003
Notes	N (See Notes)

rPM=1.553

This double is not physical.

18118-1825 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 166524		18 11 47 -18 22 52	HJ 2820 AB	2015	12	279	5.8	10.09	11.83	1.74		<===
Show			18 11 47 -18 22 52	HJ 2820 AC	2015	10	82	12.9	10.09	13.05	2.96
Show			18 11 46 -18 22 52	HJ 2820 BC	2015	10	87	18.5	11.83	13.05	1.22

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 166524		Constellation	Sagittarius		HIP	89158		Tycho2	6268-01416-1
Gaia DR2	4095595704395262592		HD	166524		BD	BD-18 4826		Distance	512.82
Distance ly	1672.82