20078+3520 SEI 901AB

Coord 2000	20078+3520		Discov num	SEI 901		Comp	AB		Coord arcsec 2000	20 07 47.34 +35 20 29.5
Date first	1896		Date last	2015		Obs	11
Pa first	86		Pa last	86		P.A. Now (θ)	86°
Sep first	15.9		Sep last	15.6		Sep. Now (ρ)	15.6"
Mag pri	12.10		Mag sec	12.30		delta mag (ΔM)	0.2		Spectral class
Pri motion ra	-003		Sec motion ra	-004
Pri motion dec	-003		Sec motion dec	-006
Notes

rPM=0.439 Nature of this double is uncertain.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			20 07 47 +35 20 30	SEI 901 AB	2015	11	86	15.6	12.10	12.30	0.20		<===
Show			20 07 49 +35 20 30	BKO 94 BC	2015	8	46	13.5	12.30	15.50	3.20

Triple system
3 visible stars in this system

Precise pa	86.4		Precise sep	15.596		Constellation	Cygnus		Tycho2	2679-01149-1
Gaia DR2	2059001480553512576

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20078+3520	SEI 901	AB	2002	5	86	15.6	12.10	12.30		D	200747.34+352029.5
20078+3520	SEI 901	AB	2015	7	87	15.6	12.10	12.30			200747.34+352029.5

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