20230+3913 STTA206AB

Coord 2000	20230+3913		Discov num	STTA206		Comp	AB		Coord arcsec 2000	20 22 57.65 +39 12 39.7
Date first	1876		Date last	2019		Obs	34
Pa first	257		Pa last	255		P.A. Now (θ)	255°
Sep first	42.7		Sep last	43.7		Sep. Now (ρ)	43.7"
Mag pri	6.72		Mag sec	8.63		delta mag (ΔM)	1.91		Spectral class	B6III (blue-white)
Pri motion ra	+002		Sec motion ra	-003
Pri motion dec	+000		Sec motion dec	-005
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.213 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69929	20230+3913	STTA206	AB	1876	2019	34	255	43.7	6.72	8.63	1.91		<===
Show		69929	20230+3913	STTA206	AD	1895	2019	9	260	24.5	6.72	11.00	4.28
Show		69927	20230+3913	SEI1107	BC	1895	2015	11	69	19.3	8.63	10.60	1.97

Quadruple system
4 visible stars in this system

Precise pa	255.1		Precise sep	43.678		Constellation	Cygnus		SAO	69929
HIP	100518		Tycho2	3152-01826-1		Gaia DR2	04309051904		HD	194206
BD	BD+38 4051		Distance	869.57		Distance ly	2836.54

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20230+3913	STTA206	AB	2007	26	255	43.5	6.72	8.63	B6III	N D	202257.65+391239.7
20230+3913	STTA206	AB	2010	27	255	43.4	6.72	8.63	B6III	N D	202257.65+391239.7
20230+3913	STTA206	AB	2012	29	255	43.3	6.72	8.63	B6III	N D	202257.65+391239.7
20230+3913	STTA206	AB	2013	31	256	44.2	6.72	8.63	B6III	N D	202257.65+391239.7
20230+3913	STTA206	AB	2017	32	256	43.6	6.72	8.63	B6III	N	202257.65+391239.7
20230+3913	STTA206	AB	2019	34	255	43.7	6.72	8.63	B6III	N	202257.65+391239.7

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