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Doubles in session

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21001+4841
STT 425 AE

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

21001+4841 STT 425 AE

21^h 00^m 06.61^s +48° 40' 45.9" P.A. 15.00 sep 45.4 mag 7.34,10.61 Sp B9p dist. 158.98 pc (518.59 l.y.)

Coord 2000	21001+4841		Discov num	STT 425		Comp	AE		Coord arcsec 2000	21 00 06.61 +48 40 45.9
Date first	1898		Date last	2016		Obs	12
Pa first	18		Pa last	15.4		P.A. Now (θ)	15.4°
Sep first	45.2		Sep last	45.38		Sep. Now (ρ)	45.38"
Mag pri	7.34		Mag sec	10.61		delta mag (ΔM)	3.27		Spectral class	B9p (blue-white)
Pri motion ra	+012		Sec motion ra	+007
Pri motion dec	+006		Sec motion dec	+010
Notes	W

rPM=0.477

Nature of this double is uncertain.

21001+4841 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 200177	50340	21 00 07 +48 40 46	BU 1210 AB	2003	8	118	2.4	7.34	12.20	4.86
Show		50340	21 00 07 +48 40 46	STT 425 AC	2016	20	27	18.2	7.34	10.80	3.46
Show		50340	21 00 07 +48 40 46	STT 425 AE	2016	12	15	45.4	7.34	10.61	3.27		<===
Show			21 00 07 +48 41 02	STT 425 CD	2016	16	132	4.3	10.80	12.30	1.50

Quintuple system
5 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation	Cygnus		SAO	50340		HIP	103658		Tycho2	3592-01443-1
Gaia DR2	2168511429924111360		HD	200177		BD	BD+48 3260		Distance	158.98
Distance ly	518.59