19540+1518 STF2596

Coord 2000	19540+1518		Discov num	STF2596		Comp			Coord arcsec 2000	19 54 01.95 +15 17 31.7
Date first	1828		Date last	2016		Obs	190
Pa first	355		Pa last	297		P.A. Now (θ)	296.6°
Sep first	2.1		Sep last	2.1		Sep. Now (ρ)	1.97"
Mag pri	7.29		Mag sec	8.68		delta mag (ΔM)	1.39		Spectral class	F8V (yellow-white)
Pri motion ra	-012		Sec motion ra	-012
Pri motion dec	-009		Sec motion dec	-009
Notes	O (Orbital solution)

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

Precise pa	297.3		Precise sep	2.147		Constellation	Aquila		SAO	105396
HIP	97922		Tycho2	1616-00256-1		Gaia DR2	95307811712		HD	188328
ADS	13082		BD	BD+14 4083		Distance	82.58		Distance ly	269.38
last precise pa	297.3		last precise sep	2.147

Period (P)	2971.0861y	± 1397.0172	Periastron (T)	2354.1964y	± 226.1355	Semi-major axis (a)	8.50966a	± 4.29319
Eccentricity (e)	0.8412	± 0.12277	Inclination (i)	102.104°	± 6.864	Longitude of periastron (ω)	242.962°	± 19.747
Node (Ω)	54.788°	± 25.109	Note			Grade	4	(1=Definitive, 9=Indet.)
Equinox			Last observation	2015

label rho theta 2000 1.963 301.7 2001 1.963 301.5 2002 1.963 301.2 2003 1.964 300.9 2004 1.964 300.7 2005 1.964 300.4 2006 1.965 300.2 2007 1.965 299.9 2008 1.966 299.7 2009 1.966 299.4 2010 1.967 299.1 2011 1.967 298.9 2012 1.968 298.6 2013 1.968 298.4 2014 1.969 298.1 2015 1.969 297.9 2016 1.970 297.6 2017 1.971 297.3 2018 1.972 297.1 2019 1.972 296.8 2020 1.973 296.6 2021 1.974 296.3 2022 1.975 296.1 2023 1.976 295.8 2024 1.977 295.6 2025 1.977 295.3 2026 1.978 295.1 2027 1.979 294.8 2028 1.980 294.5 2029 1.982 294.3 2030 1.983 294.0 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
19540+1518	STF2596		2005	191	301	2.0	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2007	193	300	2.1	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2010	195	299	1.8	7.29	8.68	F8V	D	195401.95+151731.7
19540+1518	STF2596		2011	198	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2012	186	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2013	187	298	2.0	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2014	188	297	2.1	7.29	8.68	F8V		195401.95+151731.7
19540+1518	STF2596		2016	189	297	2.1	7.29	8.68	F8V		195401.95+151731.7

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