20177+3331 HJ 1500AB

Coord 2000	20177+3331		Discov num	HJ 1500		Comp	AB		Coord arcsec 2000	20 17 43.96 +33 31 18.7
Date first	1828		Date last	2015		Obs	17
Pa first	111		Pa last	53		P.A. Now (θ)	53°
Sep first	10.0		Sep last	17.7		Sep. Now (ρ)	17.7"
Mag pri	9.45		Mag sec	10.60		delta mag (ΔM)	1.15		Spectral class	F5 (yellow-white)
Pri motion ra	+015		Sec motion ra	+051
Pri motion dec	-031		Sec motion dec	+044
Notes

rPM=1.235 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20177+3331	HJ 1500	AB	1828	2015	17	53	17.7	9.45	10.60	1.15		<===
Show			20177+3331	HJ 1500	AC	1904	2015	10	336	32.2	9.45	12.80	3.35
Show			20177+3331	HJ 1500	AD	1904	2015	12	318	40.9	9.45	12.40	2.95

Quadruple system
4 visible stars in this system

Precise pa	53.3		Precise sep	17.7		Constellation	Cygnus		SAO	69767
Tycho2	2676-00756-1		Gaia DR2	54020660864		HD	228771

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20177+3331	HJ 1500	AB	1999	8	54	17.1	9.45	10.60		D	201743.96+333118.7
20177+3331	HJ 1500	AB	2002	10	53	17.2	9.45	10.60		D	201743.96+333118.7
20177+3331	HJ 1500	AB	2011	11	53	17.8	9.45	10.60		D	201743.96+333118.7
20177+3331	HJ 1500	AB	2013	12	52	18.0	9.45	10.60	F5		201743.96+333118.7
20177+3331	HJ 1500	AB	2015	13	53	17.7	9.45	10.60	F5		201743.96+333118.7

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