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20117+3458
SEI 977

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

20117+3458 SEI 977

20^h 11^m 43.26^s +34° 57' 25.8" P.A. 39.00 sep 15.2 mag 11.84,11.89

Coord 2000	20117+3458		Discov num	SEI 977		Comp			Coord arcsec 2000	20 11 43.26 +34 57 25.8
Date first	1896		Date last	2015		Obs	19
Pa first	39		Pa last	39		P.A. Now (θ)	39°
Sep first	12.9		Sep last	15.2		Sep. Now (ρ)	15.2"
Mag pri	11.84		Mag sec	11.89		delta mag (ΔM)	0.05		Spectral class
Pri motion ra	-015		Sec motion ra	-002
Pri motion dec	-015		Sec motion dec	-002
Notes	L (Linear solution)

rPM=0.867

This double is not physical.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	38.7		Precise sep	15.225		Constellation	Cygnus		Tycho2	2679-02098-1
Gaia DR2	2058755469135687808

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20117+3458	SEI 977		1998	5	39	14.9	11.84	11.89		LD	201143.26+345725.8
20117+3458	SEI 977		2002	6	39	15.0	11.84	11.89		LD	201143.26+345725.8
20117+3458	SEI 977		2011	7	39	15.2	11.84	11.89		LD	201143.26+345725.8
20117+3458	SEI 977		2015	19	39	15.2	11.84	11.89		L	201143.26+345725.8

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