19538+4123 ES 1672AB

Coord 2000	19538+4123		Discov num	ES 1672		Comp	AB		Coord arcsec 2000	19 53 38.49 +41 21 20.8
Date first	1892		Date last	2002		Obs	7
Pa first	49		Pa last	48		P.A. Now (θ)	48°
Sep first	127.0		Sep last	127.6		Sep. Now (ρ)	127.6"
Mag pri	6.95		Mag sec	10.86		delta mag (ΔM)	3.91		Spectral class	B2IV (blue-white)
Pri motion ra	-003		Sec motion ra	-004
Pri motion dec	-013		Sec motion dec	-008
Notes

rPM=0.382 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		48943	19538+4123	ES 1672	AB	1892	2002	7	48	127.6	6.95	10.86	3.91		<===
Show		48943	19538+4123	ES 1672	BC	1917	2005	3	111	2.4	10.86	12.50	1.64

Triple system
3 visible stars in this system

Precise pa	48		Precise sep	127.582		Constellation	Cygnus		SAO	48943
HIP	97895		Tycho2	3145-02518-1		Gaia DR2	2073883580901313664		HD	188461
BD	BD+40 3931		Distance	537.63		Distance ly	1753.75

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19538+4123	ES 1672	AB	1998	6	48	127.5	6.95	10.86		D	195338.49+412120.8
19538+4123	ES 1672	AB	2002	7	48	127.5	6.95	10.86	B2IV	D	195338.49+412120.8

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