20166+3651 SEI1059

Coord 2000	20166+3651		Discov num	SEI1059		Comp			Coord arcsec 2000	20 16 33.81 +36 51 21.9
Date first	1896		Date last	2015		Obs	11
Pa first	321		Pa last	320		P.A. Now (θ)	320°
Sep first	12.9		Sep last	13.0		Sep. Now (ρ)	13"
Mag pri	9.42		Mag sec	11.80		delta mag (ΔM)	2.38		Spectral class	K0 (yellow-orange)
Pri motion ra	+002		Sec motion ra	+001
Pri motion dec	+005		Sec motion dec	+007
Notes

rPM=0.316 Nature of this double is uncertain.

Precise pa	319.9		Precise sep	12.969		Constellation	Cygnus		SAO	69731
Tycho2	2684-01741-1		Gaia DR2	89825628800		HD	228691

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20166+3651	SEI1059		1998	4	320	13.3	9.59	10.90	K0	D	201633.80+365121.8
20166+3651	SEI1059		2011	5	320	13.0	9.59	10.90	K0	D	201633.80+365121.8
20166+3651	SEI1059		2015	7	320	13.0	9.42	11.80	K0		201633.81+365121.9

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