14262-4523 I   402 (Tau2 Lup)

 
 
14h 26m 10.80s -45 22' 45.3" P.A. 188.1 sep 0.14 mag 4.93,5.55 Sp A7:+F4IV dist. 97.85 pc (319.19 l.y.)
 
 
Coord 2000
14262-4523
Discov num
I   402
Comp
Coord arcsec 2000
14 26 10.80 -45 22 45.3
Date first
1902
Date last
2014
Obs
56
Pa first
177
Pa last
184
P.A. Now (θ)
188.1°
Sep first
0.3
Sep last
0.2
Sep. Now (ρ)
0.14"
Mag pri
4.93
Mag sec
5.55
delta mag (ΔM)
0.62
Spectral class
A7:+F4IV (white/yellow-white)
Pri motion ra
+018
Sec motion ra
Pri motion dec
-002
Sec motion dec
Notes
N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Precise pa
184.4
Precise sep
0.188
Name
Tau2 Lup
Constellation
Lupus
SAO
224920
HIP
70576
Tycho2
8277-03281-1
HD
126354
HR
5396
GC
19454
CD
CD-44 9323
CP
CP-44 6771
Bayer
Tau 2 Lupi
Bayer name
Tau2 Lup
Distance
97.85
Distance ly
319.19
last precise pa
184.4
last precise sep
0.188
 
 
ORBITAL ELEMENTS
 
 
Period (P)26.016y Periastron (T)2021.305y Semi-major axis (a)0.151a
Eccentricity (e)0.962 Inclination (i)65.3° Longitude of periastron (ω)223.3°
Node (Ω)158° Note Grade2(1=Definitive, 9=Indet.)
Equinox2000 Last observation2016
label rho theta
2000 0.184 173.3
2001 0.199 174.3
2002 0.211 175.1
2003 0.220 175.9
2004 0.226 176.6
2005 0.231 177.3
2006 0.233 178.0
2007 0.234 178.6
2008 0.232 179.3
2009 0.229 180.0
2010 0.225 180.7
2011 0.218 181.4
2012 0.210 182.2
2013 0.200 183.0
2014 0.187 184.0
2015 0.173 185.1
2016 0.157 186.4
2017 0.137 188.1
2018 0.115 190.4
2019 0.088 193.9
2020 0.056 201.0
2021 0.016 239.9
2022 0.065 163.5
2023 0.111 168.3
2024 0.142 170.6
2025 0.166 172.1
2026 0.184 173.3
2027 0.199 174.2
2028 0.211 175.1
2029 0.220 175.9
2030 0.226 176.6

Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.

grafico orbita





wds14262-4523a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
14262-4523 I 402 2006 53 178 0.2 4.93 5.55 A7:+F4IV NO 142610.80-452245.3
14262-4523 I 402 2008 55 180 0.2 4.93 5.55 A7:+F4IV NO 142610.80-452245.3
14262-4523 I 402 2014 56 184 0.2 4.93 5.55 A7:+F4IV NO 142610.80-452245.3

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