20102+3644 ES   87

Coord 2000	20102+3644		Discov num	ES   87		Comp			Coord arcsec 2000	20 10 11.91 +36 44 04.6
Date first	1896		Date last	2018		Obs	22
Pa first	297		Pa last	298		P.A. Now (θ)	298°
Sep first	9.5		Sep last	8.8		Sep. Now (ρ)	8.8"
Mag pri	9.34		Mag sec	10.39		delta mag (ΔM)	1.05		Spectral class	A0V (white)
Pri motion ra	-005		Sec motion ra	+004
Pri motion dec	+000		Sec motion dec	+000
Notes	N (See Notes)

Visually invisible, K-band or other infrared star rPM=1.8 This double is not physical.

Precise pa	298.4		Precise sep	8.793		Constellation	Cygnus		SAO	69533
Tycho2	2683-02485-1		Gaia DR2	32374029184		HD	228069

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20102+3644	ES 87		2004	15	298	8.9	9.34	10.39	A0V	D	201011.91+364404.6
20102+3644	ES 87		2010	17	292	9.7	9.34	10.39	A0V		201011.91+364404.6
20102+3644	ES 87		2015	17	298	8.6	9.34	10.39	A0V	N	201011.91+364404.6
20102+3644	ES 87		2018	22	298	8.8	9.34	10.39	A0V	N	201011.91+364404.6

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