20255+4006 D    22AB

Coord 2000	20255+4006		Discov num	D    22		Comp	AB		Coord arcsec 2000	20 25 31.16 +40 05 50.8
Date first	1875		Date last	2016		Obs	71
Pa first	140		Pa last	163		P.A. Now (θ)	163°
Sep first	2.8		Sep last	2.9		Sep. Now (ρ)	2.9"
Mag pri	8.15		Mag sec	9.48		delta mag (ΔM)	1.33		Spectral class	F8V (yellow-white)
Pri motion ra	+092		Sec motion ra
Pri motion dec	+019		Sec motion dec
Notes

Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20255+4006	D 22	AB	1875	2016	71	163	2.9	8.15	9.48	1.33		<===
Show			20255+4006	D 22	AC	1905	1998	5	114	18.1	8.15	13.20	5.05
Show			20255+4006	POP 224	AD	1928	2009	6	98	71.2	8.15	11.58	3.43

Quadruple system
4 visible stars in this system

Precise pa	163.1		Precise sep	2.936		Constellation	Cygnus		SAO	70001
Tycho2	3156-00437-1		Gaia DR2	01017759616		HD	194685

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20255+4006	D 22	AB	2008	63	162	2.8	8.15	9.48	F8V		202531.14+400553.7
20255+4006	D 22	AB	2009	65	163	2.9	8.15	9.48	F8V		202531.14+400553.7
20255+4006	D 22	AB	2010	68	163	2.8	8.15	9.48	F8V		202531.14+400553.7
20255+4006	D 22	AB	2011	70	162	2.9	8.15	9.48	F8V		202531.14+400553.7
20255+4006	D 22	AB	2016	71	163	2.9	8.15	9.48	F8V		202531.16+400550.8

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