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20184+5524
STF 2671 AC

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Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20184+5524 STF 2671 AC

20^h 18^m 24.76^s +55° 23' 49.8" P.A. 53.00 sep 87.2 mag 6.01,12.40 Sp A2Vs dist. 90.5 pc (295.21 l.y.)

Coord 2000	20184+5524		Discov num	STF2671		Comp	AC		Coord arcsec 2000	20 18 24.76 +55 23 49.8
Date first	1911		Date last	2003		Obs	4
Pa first	55		Pa last	53.2		P.A. Now (θ)	53.2°
Sep first	83.9		Sep last	87.163		Sep. Now (ρ)	87.163"
Mag pri	6.01		Mag sec	12.40		delta mag (ΔM)	6.39		Spectral class	A2Vs (white)
Pri motion ra	-008		Sec motion ra	-005
Pri motion dec	-031		Sec motion dec	-001
Notes	N (See Notes)

rPM=0.942

This double is not physical.

20184+5524 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 193592	32455	20 18 25 +55 23 50	STF 2671 AB	2021	120	337	3.8	6.01	7.51	1.50
Show		32455	20 18 25 +55 23 50	STF 2671 AC	2003	4	53	87.2	6.01	12.40	6.39		<===
Show		32455	20 18 25 +55 23 50	WOR 52 AE	2003	3	54	30.3	6.01	13.70	7.69
Show			20 18 33 +55 24 41	STF 2671 CD	2015	7	138	5.3	12.40	13.30	0.90

Quintuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	32455		HIP	100097		Tycho2	3941-01957-3
Gaia DR2	2186085478327859840		HD	193592		HR	7781		ADS	13692
BD	BD+54 2329		Distance	90.5		Distance ly	295.21