19544+3918 SEI 722 AC

19^h 54^m 24.36^s +39° 17' 18.0" P.A. 65.00 sep 21.2 mag 11.10,12.50 Sp A0

Coord 2000	19544+3918		Discov num	SEI 722		Comp	AC		Coord arcsec 2000	19 54 24.36 +39 17 18.0
Date first	1896		Date last	2015		Obs	11
Pa first	66		Pa last	65		P.A. Now (θ)	65°
Sep first	20.9		Sep last	21.235		Sep. Now (ρ)	21.235"
Mag pri	11.10		Mag sec	12.50		delta mag (ΔM)	1.4		Spectral class	A0 (white)
Pri motion ra	+000		Sec motion ra	+005
Pri motion dec	-003		Sec motion dec	+002
Notes	N (See Notes)

rPM=1.313

This double is not physical.

19544+3918 SYSTEM COMPONENTS

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show	HD 226471		19 54 24 +39 17 18	SEI 721 AB	2015	12	199	6.2	11.10	12.20	1.10
Show			19 54 24 +39 17 18	SEI 722 AC	2015	11	65	21.2	11.10	12.50	1.40		<===
Show			19 54 24 +39 17 18	HJ 2909 AD	2015	12	246	30.6	11.10	12.40	1.30

Quadruple system
4 estimated visually detectable stars in this system

OTHER CATALOGS AND DESIGNATIONS

Constellation

Cygnus

Tycho2

3137-00703-1

Gaia DR2

2073383096956069248

HD

226471