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Doubles in session

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20344+3725
SEI1171

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

20344+3725 SEI1171

20^h 34^m 23.58^s +37° 24' 59.1" P.A. 201.00 sep 17.4 mag 10.85,12.19

Coord 2000	20344+3725		Discov num	SEI1171		Comp			Coord arcsec 2000	20 34 23.58 +37 24 59.1
Date first	1895		Date last	2015		Obs	15
Pa first	202		Pa last	201		P.A. Now (θ)	201°
Sep first	17.7		Sep last	17.4		Sep. Now (ρ)	17.4"
Mag pri	10.85		Mag sec	12.19		delta mag (ΔM)	1.34		Spectral class
Pri motion ra	-003		Sec motion ra	-003
Pri motion dec	-007		Sec motion dec	-004
Notes

rPM=0.394

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	200.6		Precise sep	17.388		Constellation	Cygnus		Tycho2	2698-00193-1
Gaia DR2	2063041949565158912

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20344+3725	SEI1171		1998	8	201	17.5	10.85	12.19		D	203423.58+372459.1
20344+3725	SEI1171		2002	9	201	17.4	10.85	12.19		D	203423.58+372459.1
20344+3725	SEI1171		2010	10	201	17.2	10.85	12.19			203423.58+372459.1
20344+3725	SEI1171		2015	11	201	17.4	10.85	12.19			203423.58+372459.1

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