14262-4523 I 402 (Tau2 Lup)
14h 26m 10.80s -45° 22' 45.3" P.A. 234.00 sep 0.0 mag 4.93,5.55 Sp A7:+F4IV dist. 97.85 pc (319.19 l.y.)
Coord 2000 |
14262-4523 |
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Discov num |
I 402 |
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Comp |
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Coord arcsec 2000 |
14 26 10.80 -45 22 45.3 |
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Date first |
1902 |
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Date last |
2021 |
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Obs |
64 |
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Pa first |
177 |
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Pa last |
234.1 |
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P.A. Now (θ) |
332.8° |
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Sep first |
0.3 |
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Sep last |
0.026 |
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Sep. Now (ρ) |
0.04" |
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Mag pri |
4.93 |
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Mag sec |
5.55 |
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delta mag (ΔM) |
0.62 |
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Spectral class |
A7:+F4IV (white/yellow-white) |
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Pri motion ra |
+018 |
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Sec motion ra |
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Pri motion dec |
-002 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
Tau2 Lup |
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Constellation |
Lupus |
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SAO |
224920 |
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HIP |
70576 |
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Tycho2 |
8277-03281-1 |
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HD |
126354 |
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HR |
5396 |
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GC |
19454 |
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CD |
CD-44 9323 |
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CP |
CP-44 6771 |
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Bayer |
Tau 2 Lupi |
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Bayer name |
Tau2 Lup |
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Distance |
97.85 |
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Distance ly |
319.19 |
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Bayer greek |
τ2 Lup |
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ORBITAL ELEMENTS
Period (P) | 26.21y | ± 0.1 |
Periastron (T) | 2026.46y | ± 0.65 |
Semi-major axis (a) | 0.171a | ± 0.008 |
Eccentricity (e) | 0.591 | ± 0.015 |
Inclination (i) | 83.6° | ± 0.7 |
Longitude of periastron (ω) | 222.2° | ± 5.3 |
Node (Ω) | 177.5° | ± 0.4 |
Notes | n | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2021 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
0.6 |
0.064 |
2001 |
69.9 |
0.009 |
2002 |
169.2 |
0.065 |
2003 |
173.8 |
0.118 |
2004 |
175.7 |
0.157 |
2005 |
177.0 |
0.186 |
2006 |
177.9 |
0.206 |
2007 |
178.7 |
0.220 |
2008 |
179.4 |
0.228 |
2009 |
180.1 |
0.232 |
2010 |
180.8 |
0.231 |
2011 |
181.4 |
0.227 |
2012 |
182.2 |
0.218 |
2013 |
183.0 |
0.207 |
2014 |
183.9 |
0.193 |
2015 |
184.9 |
0.176 |
2016 |
186.2 |
0.157 |
2017 |
187.9 |
0.135 |
2018 |
190.3 |
0.111 |
2019 |
194.1 |
0.086 |
2020 |
201.2 |
0.059 |
2021 |
220.2 |
0.033 |
2022 |
285.3 |
0.021 |
2023 |
332.8 |
0.040 |
2024 |
346.6 |
0.065 |
2025 |
353.2 |
0.081 |
2026 |
358.9 |
0.072 |
2027 |
22.2 |
0.019 |
2028 |
167.0 |
0.052 |
2029 |
173.2 |
0.108 |
2030 |
175.4 |
0.149 |
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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