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Current system

20311+3935
LDS6414

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

20311+3935 LDS6414

20^h 31^m 02.39^s +39° 34' 46.8" P.A. 346.00 sep 7.8 mag 14.07,16.97

Coord 2000	20311+3935		Discov num	LDS6414		Comp			Coord arcsec 2000	20 31 02.39 +39 34 46.8
Date first	1960		Date last	2016		Obs	4
Pa first	344		Pa last	346		P.A. Now (θ)	346°
Sep first	7.0		Sep last	7.8		Sep. Now (ρ)	7.8"
Mag pri	14.07		Mag sec	16.97		delta mag (ΔM)	2.9		Spectral class
Pri motion ra	+418		Sec motion ra	+413
Pri motion dec	+117		Sec motion dec	+181
Notes	N (See Notes)

rPM=0.142 (< 0.3, Physical double)

This double is physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

346.1

Precise sep

7.798

Constellation

Cygnus

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20311+3935	LDS6414		1998	2	320	6.0	14.07	16.97		D	203102.29+393446.6
20311+3935	LDS6414		2015	3	346	7.8	14.07	16.97		N	203102.39+393446.8

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