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Doubles in session

Current system

20108+3320
SEI 952

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

20108+3320 SEI 952

20^h 10^m 38.78^s +33° 12' 56.5" P.A. 194.00 sep 5.9 mag 12.82,13.02

Coord 2000	20108+3320		Discov num	SEI 952		Comp			Coord arcsec 2000	20 10 38.78 +33 12 56.5
Date first	1893		Date last	2018		Obs	10
Pa first	189		Pa last	194		P.A. Now (θ)	194°
Sep first	3.2		Sep last	5.9		Sep. Now (ρ)	5.9"
Mag pri	12.82		Mag sec	13.02		delta mag (ΔM)	0.2		Spectral class
Pri motion ra	+015		Sec motion ra	+002
Pri motion dec	-041		Sec motion dec	-024
Notes	N B (See Notes, Blue magnitudes)

rPM=0.49

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	194.3		Precise sep	5.857		Constellation	Cygnus		SAO	69558
Gaia DR2	2055225865005680384

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20108+3320	SEI 952		1998	3	191	6.4	12.82	13.02		N DB	201038.78+331256.5
20108+3320	SEI 952		2002	4	192	6.3	12.82	13.02		N DB	201038.78+331256.5
20108+3320	SEI 952		2015	5	194	6.0	12.82	13.02		N B	201038.78+331256.5
20108+3320	SEI 952		2018	10	194	5.9	12.82	13.02		N B	201038.78+331256.5

If you need more information about this double, apply for a data request form to the WDS.