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Doubles in session

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20335+3913
SEI1168

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

20335+3913 SEI1168

20^h 33^m 33.16^s +39° 13' 02.2" P.A. 118.00 sep 19.4 mag 9.80,11.30

Coord 2000	20335+3913		Discov num	SEI1168		Comp			Coord arcsec 2000	20 33 33.16 +39 13 02.2
Date first	1895		Date last	2015		Obs	10
Pa first	116		Pa last	118		P.A. Now (θ)	118°
Sep first	19.8		Sep last	19.4		Sep. Now (ρ)	19.4"
Mag pri	9.80		Mag sec	11.30		delta mag (ΔM)	1.5		Spectral class
Pri motion ra	+000		Sec motion ra	-001
Pri motion dec	-002		Sec motion dec	-004
Notes

rPM=0.542

Nature of this double is uncertain.

OTHER CATALOGS AND DESIGNATIONS

Precise pa	117.6		Precise sep	19.416		Constellation	Cygnus		Tycho2	3153-00289-1
Gaia DR2	2064234507357382016

WDS HISTORIC DATA

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20335+3913	SEI1168		1998	4	118	19.5	9.80	11.30		D	203333.16+391302.2
20335+3913	SEI1168		2009	5	117	19.7	9.80	11.30		D	203333.16+391302.2
20335+3913	SEI1168		2015	10	118	19.4	9.80	11.30			203333.16+391302.2

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