19447+4456 DA   13AB

Coord 2000	19447+4456		Discov num	DA   13		Comp	AB		Coord arcsec 2000	19 44 44.02 +44 55 44.0
Date first	1859		Date last	2018		Obs	15
Pa first	266		Pa last	274		P.A. Now (θ)	274°
Sep first	2.3		Sep last	2.0		Sep. Now (ρ)	2"
Mag pri	7.42		Mag sec	11.60		delta mag (ΔM)	4.18		Spectral class	K0 (yellow-orange)
Pri motion ra	+033		Sec motion ra
Pri motion dec	+017		Sec motion dec
Notes

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		48791	19447+4456	DA 13	AB	1859	2018	15	274	2.0	7.42	11.60	4.18		<===
Show		48791	19447+4456	DA 13	AC	1878	2015	8	288	155.3	7.42	11.98	4.56

Triple system
3 visible stars in this system

Precise pa	273.8		Precise sep	2.03		Constellation	Cygnus		SAO	48791
Tycho2	3148-00881-1		Gaia DR2	36670805376		HD	186816

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19447+4456	DA 13	AB	1946	13	272	1.8	7.42	11.60	K0		194444.02+445544.0
19447+4456	DA 13	AB	2015	14	273	2.0	7.42	11.60	K0		194444.02+445544.0
19447+4456	DA 13	AB	2018	15	274	2.0	7.42	11.60	K0		194444.02+445544.0

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