19575+2018 BU  425AB

Coord 2000	19575+2018		Discov num	BU  425		Comp	AB		Coord arcsec 2000	19 57 32.28 +20 17 40.1
Date first	1876		Date last	2016		Obs	57
Pa first	241		Pa last	240		P.A. Now (θ)	240°
Sep first	1.3		Sep last	1.4		Sep. Now (ρ)	1.4"
Mag pri	9.17		Mag sec	9.24		delta mag (ΔM)	0.07		Spectral class	B9 (blue-white)
Pri motion ra	-003		Sec motion ra	-003
Pri motion dec	-006		Sec motion dec	-006
Notes

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			19575+2018	BU 425	AB	1876	2016	57	240	1.4	9.17	9.24	0.07		<===
Show			19575+2018	BU 425	AC	1878	2015	14	40	22.0	9.17	12.61	3.44
Show			19575+2018	BU 425	AD	2000	2015	4	84	29.1	9.17	13.12	3.95

Quadruple system
4 visible stars in this system

Precise pa	239.6		Precise sep	1.438		Constellation	Sagitta		HIP	98216
Tycho2	1624-00669-1		Gaia DR2	44393685248		HD	189068		BD	BD+19 4221
Distance	540.54		Distance ly	1763.24

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19575+2018	BU 425	AB	2005	47	239	1.4	9.17	9.24	B9	D	195732.28+201740.1
19575+2018	BU 425	AB	2006	49	240	1.3	9.17	9.24	B9	D	195732.28+201740.1
19575+2018	BU 425	AB	2008	50	240	1.4	9.17	9.24	B9	D	195732.28+201740.1
19575+2018	BU 425	AB	2009	51	240	1.4	9.17	9.24	B9	D	195732.28+201740.1
19575+2018	BU 425	AB	2010	53	239	1.3	9.17	9.24	B9	D	195732.28+201740.1
19575+2018	BU 425	AB	2011	54	240	1.4	9.17	9.24	B9		195732.28+201740.1
19575+2018	BU 425	AB	2016	54	240	1.4	9.17	9.24	B9		195732.28+201740.1

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