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 |
|
Discov num |
I 402 |
|
Comp |
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Coord arcsec 2000 |
14 26 10.80 -45 22 45.3 |
|
| Date first |
1902 |
|
Date last |
2021 |
|
Obs |
64 |
|
| Pa first |
177 |
|
Pa last |
234.1 |
|
P.A. Now (θ) |
332.8° |
|
| Sep first |
0.3 |
|
Sep last |
0.026 |
|
Sep. Now (ρ) |
0.04" |
|
| 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 |
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| Pri motion dec |
-002 |
|
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 |
|
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 |
|
Bayer greek |
τ2 Lup |
|
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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