13539-1440 RST3852

Coord 2000	13539-1440		Discov num	RST3852		Comp			Coord arcsec 2000	13 53 51.68 -14 39 50.8
Date first	1937		Date last	2015		Obs	31
Pa first	140		Pa last	339		P.A. Now (θ)	333.5°
Sep first	0.3		Sep last	0.2		Sep. Now (ρ)	0.27"
Mag pri	7.85		Mag sec	8.92		delta mag (ΔM)	1.07		Spectral class	F0/2V (yellow-white)
Pri motion ra	+021		Sec motion ra
Pri motion dec	-018		Sec motion dec
Notes	N O (See Notes, Orbital solution)

This double is physical.

Constellation	Virgo		SAO	158220		HIP	67850		Tycho2	5559-00643-1
HD	121136		BD	BD-13 3786		Distance	131.58		Distance ly	429.21
last precise pa	338.7		last precise sep	0.244

Period (P)	95y		Periastron (T)	1985.8y		Semi-major axis (a)	0.225a
Eccentricity (e)	0.278		Inclination (i)	128.9°		Longitude of periastron (ω)	31.2°
Node (Ω)	150.6°		Note			Grade	3	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2009

label rho theta 2000 0.144 23.1 2001 0.153 17.9 2002 0.162 13.2 2003 0.170 9.0 2004 0.179 5.2 2005 0.188 1.8 2006 0.197 358.6 2007 0.205 355.8 2008 0.213 353.1 2009 0.220 350.7 2010 0.228 348.4 2011 0.234 346.2 2012 0.240 344.1 2013 0.246 342.2 2014 0.251 340.3 2015 0.256 338.5 2016 0.260 336.8 2017 0.264 335.1 2018 0.268 333.5 2019 0.270 331.9 2020 0.273 330.3 2021 0.275 328.7 2022 0.276 327.2 2023 0.277 325.7 2024 0.278 324.2 2025 0.278 322.7 2026 0.277 321.2 2027 0.277 319.7 2028 0.276 318.2 2029 0.274 316.7 2030 0.272 315.1 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
13539-1440	RST3852		2008	29	352	0.2	7.85	8.92	F0/2V	NO	135351.68-143950.8
13539-1440	RST3852		2009	30	350	0.2	7.85	8.92	F0/2V	NO	135351.68-143950.8
13539-1440	RST3852		2015	31	339	0.2	7.85	8.92	F0/2V	NO	135351.68-143950.8

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