19521+3148 ES 2428AB

Coord 2000	19521+3148		Discov num	ES 2428		Comp	AB		Coord arcsec 2000	19 52 08.30 +31 47 46.0
Date first	1902		Date last	2015		Obs	10
Pa first	90		Pa last	90		P.A. Now (θ)	90°
Sep first	87.7		Sep last	89.1		Sep. Now (ρ)	89.1"
Mag pri	8.82		Mag sec	11.10		delta mag (ΔM)	2.28		Spectral class	B8 (blue-white)
Pri motion ra	+002		Sec motion ra	+020
Pri motion dec	+002		Sec motion dec	-006
Notes

rPM=0.943 This double is not physical.

Show	name	SAO	coord	wds_name	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		68995	19 52 08 +31 47 46	ES 2428 AB	2015	10	90	89.1	8.82	11.10	2.28		<===
Show		68995	19 52 15 +31 47 46	ES 2428 BC	2015	8	256	5.1	11.10	11.10	0.00

Triple system
3 visible stars in this system

Precise pa	90.1		Precise sep	89.145		Constellation	Cygnus		SAO	68995
HIP	97778		Tycho2	2669-00944-1		Gaia DR2	2033819301358898304		HD	331413
BD	BD+31 3815		Distance	558.66		Distance ly	1822.35

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19521+3148	ES 2428	AB	1930	2	92	87.0	8.60	11.10	B8		195208.30+314746.0
19521+3148	ES 2428	AB	1998	3	90	89.0	8.60	11.10	B8		195208.30+314746.0
19521+3148	ES 2428	AB	2011	4	90	89.2	8.60	11.10	B8		195208.30+314746.0
19521+3148	ES 2428	AB	2014	6	90	89.1	8.60	11.10	B8		195208.30+314746.0
19521+3148	ES 2428	AB	2015	10	90	89.1	8.82	11.10	B8		195208.30+314746.0

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