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Doubles in session

Current system

21068+3408
STF 2760 AB
HD 201156

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

21068+3408 STF 2760 AB (HD 201156)

21^h 06^m 46.78^s +34° 07' 56.2" P.A. 33.00 sep 5.6 mag 7.90,8.74 Sp A4III dist. 137.17 pc (447.45 l.y.)

Coord 2000	21068+3408		Discov num	STF2760		Comp	AB		Coord arcsec 2000	21 06 46.78 +34 07 56.2
Date first	1825		Date last	2020		Obs	242
Pa first	223		Pa last	33.1		P.A. Now (θ)	33.1°
Sep first	14.3		Sep last	5.62		Sep. Now (ρ)	5.62"
Mag pri	7.90		Mag sec	8.74		delta mag (ΔM)	0.84		Spectral class	A4III (white)
Pri motion ra	+003		Sec motion ra	+061
Pri motion dec	-028		Sec motion dec	+042
Notes	L W (Linear solution, )

rPM=1.227

This double is not physical.

21068+3408 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 201156	70925	21 06 47 +34 07 56	STF 2760 AB	2020	242	33	5.6	7.90	8.74	0.84		<===
Show		70925	21 06 47 +34 07 56	STF 2760 AC	2016	20	150	57.4	7.90	11.85	3.95
Show		70925	21 06 47 +34 07 56	WAL 136 AD	2016	14	9	30.7	7.90	13.25	5.35
Show		70925	21 06 47 +34 07 56	FYM 123 AE	2016	8	211	27.0	7.90	14.10	6.20
Show		70925	21 06 47 +34 07 56	FYM 123 AF	2015	7	310	31.2	7.90	15.40	7.50
Show		70925	21 06 47 +34 07 56	FYM 123 AG	2015	4	113	46.1	7.90	16.00	8.10

Septuple system
7 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Name	HD 201156		Constellation	Cygnus		SAO	70925		HIP	104210
Tycho2	2709-01318-1		Gaia DR2	1867101865032322432		HD	201156		GC	29514
BD	BD+33 4162		Distance	137.17		Distance ly	447.45