19429+4043 STT 383AB

Coord 2000	19429+4043		Discov num	STT 383		Comp	AB		Coord arcsec 2000	19 42 56.26 +40 43 18.3
Date first	1843		Date last	2014		Obs	58
Pa first	25		Pa last	15		P.A. Now (θ)	14.6°
Sep first	0.6		Sep last	0.8		Sep. Now (ρ)	0.78"
Mag pri	7.03		Mag sec	8.28		delta mag (ΔM)	1.25		Spectral class	B9.5V (blue-white)
Pri motion ra	+004		Sec motion ra	+004
Pri motion dec	-007		Sec motion dec	-007
Notes	O (Orbital solution)

Visually invisible, K-band or other infrared star This double is physical.

Show	name	SAO	coord_2000	discov#	comp	first	last	obs	pa	sep	mag1	mag2	d_mag	orb	current
Show		48756	19429+4043	STT 383	AB	1843	2014	58	15	0.8	7.03	8.28	1.25	Y	<===
Show		48756	19429+4043	STT 383	AC	1892	2002	10	99	45.2	7.03	11.60	4.57
Show		48756	19429+4043	STT 383	AD	1892	2002	5	43	68.1	7.03	12.45	5.42

Quadruple system
4 visible stars in this system

Precise pa	14.7		Precise sep	0.783		Constellation	Cygnus		SAO	48756
HIP	97001		Tycho2	3140-01594-1		Gaia DR2	50907389568		HD	186465
ADS	12831		BD	BD+40 3856		Distance	154.56		Distance ly	504.17
last precise pa	14.7		last precise sep	0.783

Period (P)	1125y	± 186	Periastron (T)	2176.5y	± 7.6	Semi-major axis (a)	0.893a	± 0.104
Eccentricity (e)	0.417	± 0.089	Inclination (i)	101°	± 2	Longitude of periastron (ω)	100.8°	± 15.1
Node (Ω)	15.1°	± 1.2	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation

label rho theta 2000 0.826 15.9 2001 0.824 15.9 2002 0.822 15.8 2003 0.820 15.7 2004 0.818 15.7 2005 0.816 15.6 2006 0.814 15.6 2007 0.812 15.5 2008 0.810 15.4 2009 0.808 15.3 2010 0.806 15.3 2011 0.804 15.2 2012 0.802 15.1 2013 0.799 15.1 2014 0.797 15.0 2015 0.795 14.9 2016 0.792 14.9 2017 0.790 14.8 2018 0.788 14.7 2019 0.785 14.7 2020 0.783 14.6 2021 0.780 14.5 2022 0.778 14.4 2023 0.775 14.4 2024 0.772 14.3 2025 0.770 14.2 2026 0.767 14.1 2027 0.764 14.1 2028 0.762 14.0 2029 0.759 13.9 2030 0.756 13.8 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

coord_2000	discov_num	comp	epoch	obs	pa	sep	mag_pri	mag_sec	spectr	notes	coord_arcsec_2000
19429+4043	STT 383	AB	2004	50	15	0.8	7.03	8.28	B9.5V	D	194256.26+404318.3
19429+4043	STT 383	AB	2007	52	16	0.8	7.03	8.28	B9.5V	D	194256.26+404318.3
19429+4043	STT 383	AB	2009	53	15	0.8	7.03	8.28	B9.5V	D	194256.26+404318.3
19429+4043	STT 383	AB	2013	55	15	0.9	7.03	8.28	B9.5V		194256.26+404318.3
19429+4043	STT 383	AB	2014	56	15	0.8	7.03	8.28	B9.5V		194256.26+404318.3

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