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Doubles in session

Current system

20277+4507
ROE 43 AB

Selections

Full WDS
Binocular doubles
Binary Systems
Triple Systems
Quadruple Systems
Multiple Systems
Neglected List I
Neglected List II
Observed
Herschel, W.
Herschel, J.F.W.
Struve, Otto
Struve, F.G.W.

20277+4507 ROE 43 AB

20^h 27^m 42.34^s +45° 06' 37.7" P.A. 317.00 sep 17.4 mag 9.38,14.80 Sp A2

Coord 2000	20277+4507		Discov num	ROE 43		Comp	AB		Coord arcsec 2000	20 27 42.34 +45 06 37.7
Date first	1910		Date last	2015		Obs	9
Pa first	314		Pa last	316.6		P.A. Now (θ)	316.6°
Sep first	15.9		Sep last	17.373		Sep. Now (ρ)	17.373"
Mag pri	9.38		Mag sec	14.80		delta mag (ΔM)	5.42		Spectral class	A2 (white)
Pri motion ra	-009		Sec motion ra	-009
Pri motion dec	-007		Sec motion dec	-002
Notes

rPM=0.439

Nature of this double is uncertain.

20277+4507 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 27 42 +45 06 38	ROE 43 AB	2015	9	317	17.4	9.38	14.80	5.42		<===
Show			20 27 42 +45 06 38	ROE 43 AC	2015	8	312	52.6	9.38	13.19	3.81
Show			20 27 42 +45 06 38	ROE 43 AD	2015	9	271	42.4	9.38	12.47	3.09
Show			20 27 42 +45 06 38	ROE 43 AE	2015	11	282	82.9	9.38	11.19	1.81
Show			20 27 42 +45 06 38	ROE 43 AF	2015	13	336	87.1	9.38	12.40	3.02
Show			20 27 42 +45 06 38	ROE 43 AG	2015	13	282	102.4	9.38	12.85	3.47
Show			20 27 42 +45 06 38	BKO 154 AH	2015	7	224	18.4	9.38	12.70	3.32
Show			20 27 42 +45 06 38	BKO 154 AI	2015	7	63	24.2	9.38	14.00	4.62
Show			20 27 39 +45 07 13	BKO 154 CJ	2015	4	331	17.9	13.40	13.90	0.50
Show			20 27 35 +45 06 55	BKO 154 EK	2015	4	109	4.7	11.20	13.00	1.80

11-fold system
11 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3573-00540-1

Gaia DR2

2070872460915410304