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Current system

20125+3717
SEI1005

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

20125+3717 SEI1005

20^h 12^m 31.93^s +37° 17' 16.1" P.A. 56.00 sep 26.5 mag 12.67,13.14

Coord 2000	20125+3717		Discov num	SEI1005		Comp			Coord arcsec 2000	20 12 31.93 +37 17 16.1
Date first	1896		Date last	2015		Obs	12
Pa first	56		Pa last	56		P.A. Now (θ)	56°
Sep first	26.7		Sep last	26.5		Sep. Now (ρ)	26.5"
Mag pri	12.67		Mag sec	13.14		delta mag (ΔM)	0.47		Spectral class
Pri motion ra	-002		Sec motion ra	-005
Pri motion dec	-004		Sec motion dec	-005
Notes

rPM=0.447

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa

55.6

Precise sep

26.453

Constellation

Cygnus

Gaia DR2

2060786129685831936

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20125+3717	SEI1005		1983	2	56	26.3	11.81	11.80			201223.08+371730.4
20125+3717	SEI1005		2002	5	56	26.5	12.67	13.14			201231.93+371716.1
20125+3717	SEI1005		2014	6	56	26.4	12.67	13.14			201231.93+371716.1
20125+3717	SEI1005		2015	8	56	26.5	12.67	13.14			201231.93+371716.1

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