20177+3331 HJ 1500AD

Coord 2000	20177+3331		Discov num	HJ 1500		Comp	AD		Coord arcsec 2000	20 17 43.96 +33 31 18.7
Date first	1904		Date last	2015		Obs	12
Pa first	338		Pa last	318		P.A. Now (θ)	318°
Sep first	37.7		Sep last	40.9		Sep. Now (ρ)	40.9"
Mag pri	9.45		Mag sec	12.40		delta mag (ΔM)	2.95		Spectral class	F5 (yellow-white)
Pri motion ra	+015		Sec motion ra	+008
Pri motion dec	-031		Sec motion dec	+007
Notes

rPM=1.122 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69767	20177+3331	HJ 1500	AB	1828	2015	17	53	17.7	9.45	10.60	1.15
Show		69767	20177+3331	HJ 1500	AC	1904	2015	10	336	32.2	9.45	12.80	3.35
Show		69767	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	317.5		Precise sep	40.9		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	AD	1999	5	318	40.9	9.45	12.40		D	201743.96+333118.7
20177+3331	HJ 1500	AD	2002	6	318	40.9	9.45	12.40		D	201743.96+333118.7
20177+3331	HJ 1500	AD	2013	7	318	41.3	9.45	12.40	F5		201743.96+333118.7
20177+3331	HJ 1500	AD	2015	8	318	40.9	9.45	12.40	F5		201743.96+333118.7

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