18122-3921 HJ 5028 BC

18^h 12^m 09.71^s -39° 20' 40.1" P.A. 151.00 sep 13.0 mag 9.17,9.42 Sp B8/B9V+

Coord 2000	18122-3921		Discov num	HJ 5028		Comp	BC		Coord arcsec 2000	18 12 09.71 -39 20 40.1
Date first	1879		Date last	2015		Obs	15
Pa first	152		Pa last	150.7		P.A. Now (θ)	150.7°
Sep first	13.8		Sep last	13.007		Sep. Now (ρ)	13.007"
Mag pri	9.17		Mag sec	9.42		delta mag (ΔM)	0.25		Spectral class	B8/B9V+ (blue-white)
Pri motion ra	-018		Sec motion ra	-006
Pri motion dec	+000		Sec motion dec	-007
Notes

rPM=0.772

Nature of this double is uncertain.

18122-3921 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 166370	209839	18 12 10 -39 20 40	BU 759 AB	2016	14	124	2.0	8.79	9.17	0.38
Show		209839	18 12 10 -39 20 40	HJ 5028 AC	2016	21	148	14.9	8.79	9.42	0.63
Show			18 12 10 -39 20 40	HJ 5028 BC	2015	15	151	13.0	9.17	9.42	0.25		<===

Triple system
3 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Corona Austrina

Tycho2

7900-01802-1

Gaia DR2

6726045641691326976