20184+5524 STF2671AB

Coord 2000	20184+5524		Discov num	STF2671		Comp	AB		Coord arcsec 2000	20 18 24.76 +55 23 49.8
Date first	1823		Date last	2017		Obs	119
Pa first	340		Pa last	337		P.A. Now (θ)	337°
Sep first	4.0		Sep last	3.7		Sep. Now (ρ)	3.7"
Mag pri	6.01		Mag sec	7.51		delta mag (ΔM)	1.5		Spectral class	A2Vs (white)
Pri motion ra	-003		Sec motion ra	-008
Pri motion dec	-049		Sec motion dec	-031
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=0.381 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		32455	20184+5524	STF2671	AB	1823	2017	119	337	3.7	6.01	7.51	1.50		<===
Show		32455	20184+5524	STF2671	AC	1911	2003	4	53	87.2	6.01	12.40	6.39
Show		32455	20184+5524	WOR 52	AE	1960	2003	3	54	30.3	6.01	13.70	7.69
Show		32455	20184+5524	STF2671	CD	1911	2015	7	138	5.3	12.40	13.30	0.90

Quintuple system
5 visible stars in this system

Precise pa	337.1		Precise sep	3.718		Constellation	Cygnus		SAO	32455
HIP	100097		Tycho2	3941-01957-3		Gaia DR2	78327859840		HD	193592
HR	7781		BD	BD+54 2329		Distance	90.5		Distance ly	295.21

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20184+5524	STF2671	AB	2008	97	338	3.6	6.01	7.51	A2Vs	N D	201824.76+552349.8
20184+5524	STF2671	AB	2010	106	337	3.6	6.01	7.51	A2Vs	N D	201824.76+552349.8
20184+5524	STF2671	AB	2012	108	337	3.8	6.01	7.51	A2Vs	N D	201824.76+552349.8
20184+5524	STF2671	AB	2014	111	338	3.7	6.01	7.51	A2Vs	N D	201824.76+552349.8
20184+5524	STF2671	AB	2016	116	337	3.8	6.01	7.51	A2Vs	N	201824.76+552349.8
20184+5524	STF2671	AB	2017	119	337	3.7	6.01	7.51	A2Vs	N	201824.76+552349.8

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