18136-1536 BU 131 BC

18^h 13^m 35.30^s -15° 35' 53.7" P.A. 310.00 sep 6.2 mag 9.30,11.75

Coord 2000	18136-1536		Discov num	BU 131		Comp	BC		Coord arcsec 2000	18 13 35.30 -15 35 53.7
Date first	1880		Date last	2005		Obs	17
Pa first	278		Pa last	309.9		P.A. Now (θ)	309.9°
Sep first	4.6		Sep last	6.15		Sep. Now (ρ)	6.15"
Mag pri	9.30		Mag sec	11.75		delta mag (ΔM)	2.45		Spectral class
Pri motion ra			Sec motion ra
Pri motion dec			Sec motion dec
Notes

Nature of this double is uncertain.

18136-1536 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 166962		18 13 35 -15 35 54	BU 131 AB	2016	40	277	3.2	7.54	9.30	1.76
Show			18 13 35 -15 35 54	BU 131 AC	2015	20	300	9.2	7.54	11.75	4.21
Show			18 13 35 -15 35 54	FOX 221 AD	2015	6	34	40.8	7.54	12.52	4.98
Show			18 13 35 -15 35 54	BU 131 BC	2005	17	310	6.2	9.30	11.75	2.45		<===

Quadruple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Serpens

Gaia DR2

4145814493572563328