20104+3644 SEI 945AB

Coord 2000	20104+3644		Discov num	SEI 945		Comp	AB		Coord arcsec 2000	20 10 26.44 +36 44 01.2
Date first	1896		Date last	2015		Obs	12
Pa first	276		Pa last	276		P.A. Now (θ)	276°
Sep first	6.6		Sep last	5.9		Sep. Now (ρ)	5.9"
Mag pri	9.50		Mag sec	11.00		delta mag (ΔM)	1.5		Spectral class	B8 (blue-white)
Pri motion ra	-001		Sec motion ra	+009
Pri motion dec	-007		Sec motion dec	-007
Notes	N (See Notes)

rPM=0.877 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 10 26 +36 44 01	SEI 945 AB	2015	12	276	5.9	9.50	11.00	1.50		<===
Show			20 10 26 +36 44 01	SEI 946 AC	2014	5	64	13.7	9.50	11.00	1.50

Triple system
3 visible stars in this system

Precise pa	275.6		Precise sep	5.902		Constellation	Cygnus		Tycho2	2683-02793-1
Gaia DR2	2059246847770108160

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20104+3644	SEI 945	AB	2006	5	274	6.2	9.50	11.00		D	201026.44+364401.2
20104+3644	SEI 945	AB	2014	7	277	6.0	9.50	11.00		N	201026.44+364401.2
20104+3644	SEI 945	AB	2015	8	275	5.9	9.50	11.00	B8	N	201026.44+364401.2

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