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Doubles in session

Current system

20072+3616
SEI 891 AB

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

20072+3616 SEI 891 AB

20^h 07^m 12.03^s +36° 16' 07.2" P.A. 171.00 sep 18.7 mag 11.15,12.53

Coord 2000	20072+3616		Discov num	SEI 891		Comp	AB		Coord arcsec 2000	20 07 12.03 +36 16 07.2
Date first	1896		Date last	2015		Obs	11
Pa first	173		Pa last	171.4		P.A. Now (θ)	171.4°
Sep first	20.0		Sep last	18.653		Sep. Now (ρ)	18.653"
Mag pri	11.15		Mag sec	12.53		delta mag (ΔM)	1.38		Spectral class
Pri motion ra	-002		Sec motion ra	+003
Pri motion dec	-010		Sec motion dec	+000
Notes

rPM=1.096

This double is not physical.

20072+3616 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 07 12 +36 16 07	SEI 891 AB	2015	11	171	18.7	11.15	12.53	1.38		<===
Show			20 07 12 +36 16 07	BKO 89 AC	2015	8	349	29.1	11.15	12.46	1.31
Show			20 07 12 +36 16 07	BKO 89 AE	2015	14	282	120.8	11.15	11.00	0.15
Show			20 07 12 +36 16 35	BKO 89 CD	2015	8	192	9.7	13.20	13.70	0.50
Show			20 07 02 +36 16 32	BKO 89 EF	2015	8	19	7.6	11.00	14.00	3.00

Sextuple system
6 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

2683-02290-1

Gaia DR2

2059218432264559232