20136+3640 SEI1023

Coord 2000	20136+3640		Discov num	SEI1023		Comp			Coord arcsec 2000	20 13 34.39 +36 40 29.3
Date first	1896		Date last	2015		Obs	17
Pa first	341		Pa last	344		P.A. Now (θ)	344°
Sep first	24.9		Sep last	28.6		Sep. Now (ρ)	28.6"
Mag pri	9.18		Mag sec	10.53		delta mag (ΔM)	1.35		Spectral class	A7III (white)
Pri motion ra	-006		Sec motion ra	+002
Pri motion dec	-033		Sec motion dec	-003
Notes

rPM=0.926 This double is not physical.

Precise pa	343.5		Precise sep	28.581		Constellation	Cygnus		SAO	69641
Tycho2	2683-03267-1		Gaia DR2	68969983104		HD	228403

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20136+3640	SEI1023		2004	11	343	28.6	9.18	10.53	A7III	D	201334.39+364029.3
20136+3640	SEI1023		2010	13	344	28.5	9.18	10.53	A7III		201334.39+364029.3
20136+3640	SEI1023		2015	14	344	28.6	9.18	10.53	A7III		201334.39+364029.3

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