19500+4509 ES   23AC

Coord 2000	19500+4509		Discov num	ES   23		Comp	AC		Coord arcsec 2000	19 49 59.38 +45 09 05.4
Date first	1915		Date last	2011		Obs	3
Pa first	103		Pa last	98		P.A. Now (θ)	98°
Sep first	10.7		Sep last	13.0		Sep. Now (ρ)	13"
Mag pri	8.27		Mag sec	15.00		delta mag (ΔM)	6.73		Spectral class	K0 (yellow-orange)
Pri motion ra	-008		Sec motion ra	+089
Pri motion dec	-008		Sec motion dec	+000
Notes

rPM=1.094 This double is not physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			19500+4509	ES 23	AB	1892	2007	11	136	8.5	8.27	12.60	4.33
Show			19500+4509	ES 23	AC	1915	2011	3	98	13.0	8.27	15.00	6.73		<===
Show			19500+4509	ES 23	AD	1892	2008	17	326	30.6	8.27	10.01	1.74

Quadruple system
4 visible stars in this system

Precise pa	97.5		Precise sep	12.99		Cdsa2 id	ES 23 AC		Constellation	Cygnus
Ra deg	19.83316111111111		De deg	45.1515		last precise pa	97.5		last precise sep	12.99

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19500+4509	ES 23	AC	1915	1	103	10.7	8.27	15.00	K0		194959.38+450905.4
19500+4509	ES 23	AC	2011	2	98	13.0	8.27	15.00	K0		194959.38+450905.4

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