19579+3843 TOB 163AC

Coord 2000	19579+3843		Discov num	TOB 163		Comp	AC		Coord arcsec 2000	19 57 49.54 +38 43 37.8
Date first	1929		Date last	2017		Obs	6
Pa first	76		Pa last	72		P.A. Now (θ)	72°
Sep first	24.0		Sep last	23.5		Sep. Now (ρ)	23.5"
Mag pri	11.70		Mag sec	11.90		delta mag (ΔM)	0.2		Spectral class
Pri motion ra	-009		Sec motion ra	-024
Pri motion dec	-014		Sec motion dec	+002
Notes

rPM=0.911 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69171	19579+3843	SEI 751	AB	1896	2017	13	259	20.4	11.70	12.04	0.34
Show		69171	19579+3843	TOB 163	AC	1929	2017	6	72	23.5	11.70	11.90	0.20		<===
Show		69171	19579+3843	MLB 949	CD	1934	2017	3	105	3.1	12.20	13.80	1.60

Quadruple system
4 visible stars in this system

Precise pa	72.3		Precise sep	23.538		Constellation	Cygnus		SAO	69171
Tycho2	3137-02906-1		Gaia DR2	92756773376

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19579+3843	TOB 163	AC	1998	3	73	23.4	11.70	11.90		D	195749.54+384337.8
19579+3843	TOB 163	AC	2002	4	72	23.4	11.70	11.90		D	195749.54+384337.8
19579+3843	TOB 163	AC	2015	5	72	23.4	11.70	11.90			195749.54+384337.8
19579+3843	TOB 163	AC	2017	6	72	23.5	11.70	11.90			195749.54+384337.8

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