19474-0148 A  2993

Coord 2000	19474-0148		Discov num	A  2993		Comp			Coord arcsec 2000	19 47 23.94 -01 48 28.8
Date first	1915		Date last	2014		Obs	25
Pa first	160		Pa last	277		P.A. Now (θ)	265.2°
Sep first	0.2		Sep last	0.1		Sep. Now (ρ)	0.11"
Mag pri	9.06		Mag sec	9.09		delta mag (ΔM)	0.03		Spectral class	A2 (white)
Pri motion ra	+005		Sec motion ra
Pri motion dec	-012		Sec motion dec
Notes	O (Orbital solution)

This double is physical.

Precise pa	276.8		Precise sep	0.109		Constellation	Aquila		HIP	97367
Tycho2	5146-02146-1		HD	186949		ADS	12924		BD	BD-02 5115
Distance	116.55		Distance ly	380.19		last precise pa	276.8		last precise sep	0.109

Period (P)	138.36y		Periastron (T)	1984.83y		Semi-major axis (a)	0.22a
Eccentricity (e)	0.075		Inclination (i)	116.1°		Longitude of periastron (ω)	344.4°
Node (Ω)	327°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.186 312.9 2001 0.182 311.3 2002 0.178 309.6 2003 0.174 307.8 2004 0.169 305.9 2005 0.165 303.9 2006 0.160 301.8 2007 0.155 299.6 2008 0.149 297.2 2009 0.144 294.6 2010 0.139 291.9 2011 0.134 288.9 2012 0.128 285.7 2013 0.124 282.2 2014 0.119 278.4 2015 0.114 274.3 2016 0.110 269.9 2017 0.107 265.2 2018 0.104 260.2 2019 0.101 255.0 2020 0.099 249.5 2021 0.098 243.8 2022 0.098 238.1 2023 0.099 232.4 2024 0.100 226.8 2025 0.102 221.4 2026 0.105 216.2 2027 0.108 211.3 2028 0.112 206.8 2029 0.116 202.5 2030 0.121 198.6 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
19474-0148	A 2993		1996	21	319	0.2	9.06	9.09	A2	NO	194723.94-014828.8
19474-0148	A 2993		2009	23	296	0.1	9.06	9.09	A2	NO	194723.94-014828.8
19474-0148	A 2993		2014	25	277	0.1	9.06	9.09	A2	O	194723.94-014828.8

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