20158+2749 MCA  60AB (23 Vul)

Coord 2000	20158+2749		Discov num	MCA  60		Comp	AB		Coord arcsec 2000	20 15 46.16 +27 48 51.2
Date first	1980		Date last	2004		Obs	27
Pa first	141		Pa last	148		P.A. Now (θ)	148°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.1"
Mag pri	4.80		Mag sec	6.94		delta mag (ΔM)	2.14		Spectral class	K3-III (yellow-orange)
Pri motion ra	-036		Sec motion ra
Pri motion dec	+003		Sec motion dec
Notes	N (See Notes)

Visually invisible, K-band or other infrared star Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		88428	20158+2749	CHR 94	Aa,Ab	1985	2007	5	229	0.1	4.80	6.50	1.70	Y
Show	23 Vul	88428	20158+2749	MCA 60	AB	1980	2004	27	148	0.1	4.80	6.94	2.14		<===

Triple system
2 visible stars in this system

Precise pa	147.8		Precise sep	0.091		Name	23 Vul		Constellation	Vulpecula
SAO	88428		HIP	99874		Tycho2	2163-01794-1		Gaia DR2	16310522496
HD	192806		HR	7744		GC	28152		BD	BD+27 3666
Flamsteed	23 Vulpeculae		Flamsteed name	23 Vul		Distance	103.84		Distance ly	338.73

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20158+2749	MCA 60	AB	1998	25	145	0.2	4.80	6.94		D	201546.16+274851.2
20158+2749	MCA 60	AB	2004	26	328	0.1	4.80	6.94		D	201546.16+274851.2

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