19524+2551 STT 388AC

Coord 2000	19524+2551		Discov num	STT 388		Comp	AC		Coord arcsec 2000	19 52 19.42 +25 51 46.4
Date first	1883		Date last	2018		Obs	41
Pa first	138		Pa last	129		P.A. Now (θ)	129°
Sep first	31.2		Sep last	32.3		Sep. Now (ρ)	32.3"
Mag pri	8.32		Mag sec	9.49		delta mag (ΔM)	1.17		Spectral class	B9.5V (blue-white)
Pri motion ra	-020		Sec motion ra	+027
Pri motion dec	+023		Sec motion dec	+021
Notes	N U (See Notes, Proper motion indicates non-physical)

Visually invisible, K-band or other infrared star rPM=1.375 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19524+2551	STT 388	AB	1843	2018	90	139	3.2	8.32	8.45	0.13
Show			19524+2551	STT 388	AC	1883	2018	41	129	32.3	8.32	9.49	1.17		<===
Show			19524+2551	STT 388	BC	1843	2018	40	129	29.3	8.45	9.49	1.04

Triple system
3 visible stars in this system

Precise pa	129.1		Precise sep	32.3		Constellation	Vulpecula		HIP	97792
Tycho2	2144-01673-1		Gaia DR2	82612875520		HD	188060		BD	BD+25 4004
Distance	358.42		Distance ly	1169.17

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19524+2551	STT 388	AC	2007	30	130	32.1	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2008	32	129	31.8	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2009	33	130	31.6	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2010	34	130	31.7	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2012	36	130	31.7	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2014	37	129	31.9	8.32	9.49	B9.5V	NLD	195219.42+255146.4
19524+2551	STT 388	AC	2016	38	129	31.6	8.32	9.49	B9.5V	NL	195219.42+255146.4
19524+2551	STT 388	AC	2018	40	129	32.3	8.32	9.49	B9.5V	NL	195219.42+255146.4

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