20190+4938 ES 2693AB

Coord 2000	20190+4938		Discov num	ES 2693		Comp	AB		Coord arcsec 2000	20 18 58.13 +49 37 35.9
Date first	1899		Date last	2018		Obs	16
Pa first	111		Pa last	111		P.A. Now (θ)	111°
Sep first	31.4		Sep last	30.6		Sep. Now (ρ)	30.6"
Mag pri	8.76		Mag sec	9.59		delta mag (ΔM)	0.83		Spectral class	A2 (white)
Pri motion ra	+009		Sec motion ra	+005
Pri motion dec	-002		Sec motion dec	+001
Notes

rPM=0.542 Nature of this double is uncertain.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		49464	20190+4938	ES 2693	AB	1899	2018	16	111	30.6	8.76	9.59	0.83		<===
Show		49464	20190+4938	ES 2693	BC	1911	2015	8	189	18.5	9.59	12.20	2.61

Triple system
3 visible stars in this system

Precise pa	110.7		Precise sep	30.61		Constellation	Cygnus		SAO	49464
Tycho2	3580-01850-1		Gaia DR2	13509371392		HD	193609

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
20190+4938	ES 2693	AB	2004	10	110	30.6	8.76	9.59	A2	D	201858.13+493735.9
20190+4938	ES 2693	AB	2015	12	110	30.6	8.76	9.59	A2		201858.13+493735.9
20190+4938	ES 2693	AB	2018	13	111	30.6	8.76	9.59	A2		201858.13+493735.9

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