19482+7016 STF2603 (Tyl)

Coord 2000	19482+7016		Discov num	STF2603		Comp			Coord arcsec 2000	19 48 10.35 +70 16 04.5
Date first	1823		Date last	2017		Obs	155
Pa first	355		Pa last	21		P.A. Now (θ)	21.6°
Sep first	2.6		Sep last	3.2		Sep. Now (ρ)	3.2"
Mag pri	4.01		Mag sec	6.87		delta mag (ΔM)	2.86		Spectral class	G7IIIb (yellow)
Pri motion ra	+079		Sec motion ra
Pri motion dec	+039		Sec motion dec
Notes	N O (See Notes, Orbital solution)

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

Precise pa	20.6		Precise sep	3.16		Common name	Tyl		Meaning	red fish
Other names	KIN YU		Constellation	Draco		SAO	9540		HIP	97433
Tycho2	4449-02652-1		Gaia DR2	16253487360		HD	188119		HR	7582
GC	27471		ADS	13007		BD	BD+69 1070		Bayer	Epsilon Draconis
Bayer name	Eps Dra		Flamsteed	63 Draconis		Flamsteed name	63 Dra		Distance	45.37
Distance ly	148		last precise pa	20.6		last precise sep	3.16

Period (P)	2753.3257y	± 1292.0608	Periastron (T)	1598.5654y	± 561.9011	Semi-major axis (a)	8.01058a	± 4.07389
Eccentricity (e)	0.83937	± 0.13066	Inclination (i)	70.932°	± 9.569	Longitude of periastron (ω)	111.258°	± 28.09
Node (Ω)	128.309°	± 68.794	Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox			Last observation	2012

label rho theta 2000 3.157 18.6 2001 3.159 18.8 2002 3.161 18.9 2003 3.163 19.1 2004 3.165 19.2 2005 3.167 19.4 2006 3.169 19.5 2007 3.171 19.7 2008 3.173 19.8 2009 3.175 20.0 2010 3.177 20.1 2011 3.180 20.3 2012 3.182 20.4 2013 3.184 20.6 2014 3.186 20.7 2015 3.188 20.9 2016 3.190 21.0 2017 3.192 21.2 2018 3.194 21.3 2019 3.196 21.5 2020 3.199 21.6 2021 3.201 21.7 2022 3.203 21.9 2023 3.205 22.0 2024 3.207 22.2 2025 3.210 22.3 2026 3.212 22.5 2027 3.214 22.6 2028 3.216 22.8 2029 3.219 22.9 2030 3.221 23.0 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
19482+7016	STF2603		2005	148	19	3.2	4.01	6.87	G7IIIb	N D	194810.35+701604.5
19482+7016	STF2603		2007	150	20	3.1	4.01	6.87	G7IIIb	N D	194810.35+701604.5
19482+7016	STF2603		2008	149	341	4.8	4.01	6.87	G7IIIb	N D	194810.35+701604.5
19482+7016	STF2603		2010	151	19	3.0	4.01	6.87	G7IIIb	N D	194810.35+701604.5
19482+7016	STF2603		2012	152	21	3.1	4.01	6.87	G7IIIb	N D	194810.35+701604.5
19482+7016	STF2603		2017	153	21	3.2	4.01	6.87	G7IIIb	N	194810.35+701604.5

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