19539+4425 GIC 159AB

Coord 2000	19539+4425		Discov num	GIC 159		Comp	AB		Coord arcsec 2000	19 53 54.48 +44 24 53.3
Date first	1954		Date last	2019		Obs	21
Pa first	106		Pa last	69		P.A. Now (θ)	69°
Sep first	7.9		Sep last	6.0		Sep. Now (ρ)	6"
Mag pri	14.26		Mag sec	14.96		delta mag (ΔM)	0.7		Spectral class	M5.5V+M6V (red/red)
Pri motion ra	+361		Sec motion ra	+443
Pri motion dec	-483		Sec motion dec	-581
Notes	N Z (See Notes, Parallax indicates components are physical)

Visually invisible, K-band or other infrared star rPM=0.175 (< 0.3, Physical double) This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19539+4425	MCY 3	Aa,Ab	1986	2016	20	288	0.8	13.50	16.80	3.30	Y
Show			19539+4425	GIC 159	AB	1954	2019	21	69	6.0	14.26	14.96	0.70		<===
Show			19539+4425	CRC 36	BC	2012	2012	2	112	14.9	7.80

Quadruple system
3 visible stars in this system

Precise pa

68.5

Precise sep

6.02

Constellation

Cygnus

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19539+4425	GIC 159	AB	2000	12	80	7.0	14.26	14.96	M6Ve	N D	195354.48+442453.3
19539+4425	GIC 159	AB	2003	13	80	7.2	14.26	14.96	M6Ve	N D	195354.48+442453.3
19539+4425	GIC 159	AB	2012	15	70	6.5	14.26	14.96	M5.5V+M6V	N	195354.48+442453.3
19539+4425	GIC 159	AB	2016	17	70	5.9	14.26	14.96	M5.5V+M6V	NZ	195354.48+442453.3
19539+4425	GIC 159	AB	2019	21	69	6.0	14.26	14.96	M5.5V+M6V	NZ	195354.48+442453.3

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