20054+3539 SEI 847AB

Coord 2000	20054+3539		Discov num	SEI 847		Comp	AB		Coord arcsec 2000	20 05 24.00 +35 38 55.4
Date first	1896		Date last	2015		Obs	7
Pa first	347		Pa last	8		P.A. Now (θ)	8°
Sep first	4.7		Sep last	4.9		Sep. Now (ρ)	4.9"
Mag pri	10.50		Mag sec	11.00		delta mag (ΔM)	0.5		Spectral class
Pri motion ra	-008		Sec motion ra	+004
Pri motion dec	-010		Sec motion dec	-002
Notes

rPM=1.126 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		69376	20054+3539	SEI 847	AB	1896	2015	7	8	4.9	10.50	11.00	0.50		<===
Show		69376	20054+3539	SEI 848	AC	1896	2015	6	80	19.8	12.18	13.06	0.88

Triple system
3 visible stars in this system

Precise pa	8		Precise sep	4.91		Constellation	Cygnus		SAO	69376
Gaia DR2	95481775488

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20054+3539	SEI 847	AB	2006	4	7	4.7	10.50	11.00		I	200524.07+353856.1
20054+3539	SEI 847	AB	2015	7	8	4.9	10.50	11.00			200524.00+353855.4

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