19544+3918 HJ 2909AD

Coord 2000	19544+3918		Discov num	HJ 2909		Comp	AD		Coord arcsec 2000	19 54 24.36 +39 17 18.0
Date first	1895		Date last	2015		Obs	12
Pa first	247		Pa last	246		P.A. Now (θ)	246°
Sep first	29.6		Sep last	30.6		Sep. Now (ρ)	30.6"
Mag pri	11.10		Mag sec	12.40		delta mag (ΔM)	1.3		Spectral class	A0 (white)
Pri motion ra	+000		Sec motion ra	-007
Pri motion dec	-003		Sec motion dec	-003
Notes	N (See Notes)

rPM=0.919 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show			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 visible stars in this system

Precise pa	246.1		Precise sep	30.555		Constellation	Cygnus		Tycho2	3137-00703-1
Gaia DR2	2073383096956069248		HD	226471

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19544+3918	HJ 2909	AD	1998	6	246	30.5	11.10	12.10		D	195424.36+391718.0
19544+3918	HJ 2909	AD	2002	7	246	30.5	11.10	12.10		D	195424.36+391718.0
19544+3918	HJ 2909	AD	2015	8	246	30.5	11.10	12.40	A0	N	195424.36+391718.0

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