20093+3529 STF2639AB

Coord 2000	20093+3529		Discov num	STF2639		Comp	AB		Coord arcsec 2000	20 09 14.32 +35 29 01.9
Date first	1825		Date last	2018		Obs	57
Pa first	303		Pa last	302		P.A. Now (θ)	302°
Sep first	5.4		Sep last	5.8		Sep. Now (ρ)	5.8"
Mag pri	7.78		Mag sec	8.67		delta mag (ΔM)	0.89		Spectral class	B0.5IV (blue-white)
Pri motion ra	-003		Sec motion ra	+005
Pri motion dec	-005		Sec motion dec	-016
Notes

rPM=0.811 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20093+3529	STF2639	AB	1825	2018	57	302	5.8	7.78	8.67	0.89		<===
Show			20093+3529	SEI 923	AC	1896	2016	13	93	37.4	7.78	11.26	3.48
Show			20093+3529	SEI 924	CD	1895	2016	16	207	27.8	11.26	11.61	0.35

Quadruple system
4 visible stars in this system

Precise pa	301.8		Precise sep	5.783		Constellation	Cygnus		SAO	69512
HIP	99283		Tycho2	2679-00447-1		Gaia DR2	07537751680		HD	191566
BD	BD+35 3994		Distance	387.6		Distance ly	1264.35

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20093+3529	STF2639	AB	2007	48	302	5.9	7.78	8.67	B0.5IV	D	200914.32+352901.9
20093+3529	STF2639	AB	2012	51	301	5.7	7.78	8.67	B0.5IV	D	200914.32+352901.9
20093+3529	STF2639	AB	2016	53	300	5.5	7.78	8.67	B0.5IV		200914.32+352901.9
20093+3529	STF2639	AB	2018	55	302	5.8	7.78	8.67	B0.5IV		200914.32+352901.9

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