19418+5032 TRN   4Aa,Ab

Coord 2000	19418+5032		Discov num	TRN   4		Comp	Aa,Ab		Coord arcsec 2000	19 41 49.09 +50 31 31.6
Date first	1998		Date last	2009		Obs	11
Pa first	204		Pa last	208		P.A. Now (θ)	208°
Sep first	3.5		Sep last	3.2		Sep. Now (ρ)	3.2"
Mag pri	5.99		Mag sec	13.00		delta mag (ΔM)	7.01		Spectral class	G1.5V+M5V (yellow/red)
Pri motion ra	-146		Sec motion ra
Pri motion dec	-155		Sec motion dec
Notes	N V (See Notes, Proper motion indicates physical)

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		31898	19418+5032	TRN 4	Aa,Ab	1998	2009	11	208	3.2	5.99	13.00	7.01	Y	<===
Show	16 Cyg	31898	19418+5032	STFA 46	AB	1800	2019	589	132	39.5	6.00	6.23	0.23
Show		31899	19418+5032	PAT 48	BC	1998	2015	5	70	18.2	4.65	11.91	7.26

Quadruple system
3 visible stars in this system

Precise pa	207.6		Precise sep	3.15		Other name	c Cyg		Constellation	Cygnus
SAO	31898		HIP	96895		Tycho2	3565-01524-1		HD	186408
HR	7503		GC	27284		ADS	12815		GL	Gl 765.1A
BD	BD+50 2847		Flamsteed	16 Cygni		Flamsteed name	16 Cyg		Distance	21.08
Distance ly	68.76		last precise pa	207.6		last precise sep	3.15

Period (P)	135.127c		Periastron (T)	153.25y		Semi-major axis (a)	35.242a
Eccentricity (e)	0.863		Inclination (i)	135.44°		Longitude of periastron (ω)	26.6°
Node (Ω)	313.44°		Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	1998

label rho theta 2000 39.552 133.3 2001 39.565 133.3 2002 39.577 133.3 2003 39.590 133.3 2004 39.602 133.3 2005 39.615 133.3 2006 39.627 133.3 2007 39.639 133.3 2008 39.652 133.3 2009 39.664 133.3 2010 39.677 133.3 2011 39.689 133.3 2012 39.701 133.3 2013 39.714 133.2 2014 39.726 133.2 2015 39.739 133.2 2016 39.751 133.2 2017 39.763 133.2 2018 39.776 133.2 2019 39.788 133.2 2020 39.801 133.2 2021 39.813 133.2 2022 39.825 133.2 2023 39.838 133.2 2024 39.850 133.2 2025 39.862 133.2 2026 39.875 133.1 2027 39.887 133.1 2028 39.899 133.1 2029 39.912 133.1 2030 39.924 133.1 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
19418+5032	TRN 4	Aa,Ab	2000	5	205	3.4	5.99	13.00	G1.5V	DV	194149.09+503131.6
19418+5032	TRN 4	Aa,Ab	2002	7	204	3.4	5.99	13.00	G1.5V	NVD	194149.09+503131.6
19418+5032	TRN 4	Aa,Ab	2009	8	208	3.2	5.99	13.00	G1.5V	NV	194149.09+503131.6

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