20203+3924 STF2668AB,C

Coord 2000	20203+3924		Discov num	STF2668		Comp	AB,C		Coord arcsec 2000	20 20 15.22 +39 24 11.8
Date first	1831		Date last	2016		Obs	63
Pa first	294		Pa last	280		P.A. Now (θ)	280°
Sep first	3.3		Sep last	3.5		Sep. Now (ρ)	3.5"
Mag pri	6.34		Mag sec	8.49		delta mag (ΔM)	2.15		Spectral class	A1V (white)
Pri motion ra	+003		Sec motion ra	-005
Pri motion dec	-024		Sec motion dec	-023
Notes	N V (See Notes, Proper motion indicates physical)

Visually invisible, K-band or other infrared star rPM=0.333 This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69856	20203+3924	A 1427	AB	1906	2008	47	144	0.2	6.57	8.17	1.60	Y
Show		69856	20203+3924	STF2668	AB,C	1831	2016	63	280	3.5	6.34	8.49	2.15		<===

Triple system
4 visible stars in this system

Precise pa	280		Precise sep	3.452		Constellation	Cygnus		SAO	69856
HIP	100268		Tycho2	3156-02225-1		Gaia DR2	69341204736		HD	193702
HR	7784		BD	BD+38 4021		Distance	180.51		Distance ly	588.82

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20203+3924	STF2668	AB,C	2010	57	280	3.2	6.34	8.49		N D	202015.22+392411.8
20203+3924	STF2668	AB,C	2011	58	281	3.4	6.34	8.49		N D	202015.22+392411.8
20203+3924	STF2668	AB,C	2012	59	281	3.3	6.34	8.49		N D	202015.22+392411.8
20203+3924	STF2668	AB,C	2013	61	279	3.3	6.34	8.49	A1V	NVD	202015.22+392411.8
20203+3924	STF2668	AB,C	2016	63	280	3.5	6.34	8.49	A1V	NV	202015.22+392411.8

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