13571-2731 I 234 (HD 121632)
13h 57m 06.59s -27° 31' 25.8" P.A. 215.00 sep 0.6 mag 8.61,9.67 Sp G8/K0V dist. 140.06 pc (456.88 l.y.)
Coord 2000 |
13571-2731 |
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Discov num |
I 234 |
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Comp |
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Coord arcsec 2000 |
13 57 06.59 -27 31 25.8 |
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Date first |
1897 |
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Date last |
2014 |
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Obs |
27 |
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Pa first |
315 |
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Pa last |
214.9 |
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P.A. Now (θ) |
214.9° |
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Sep first |
0.8 |
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Sep last |
0.575 |
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Sep. Now (ρ) |
0.575" |
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Mag pri |
8.61 |
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Mag sec |
9.67 |
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delta mag (ΔM) |
1.06 |
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Spectral class |
G8/K0V (yellow) |
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Pri motion ra |
-154 |
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Sec motion ra |
-154 |
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Pri motion dec |
-062 |
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Sec motion dec |
-062 |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 121632 |
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Constellation |
Hydra |
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SAO |
182111 |
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HIP |
68148 |
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Tycho2 |
6724-00569-1 |
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Gaia DR2 |
6177381028669665920 |
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HD |
121632 |
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ADS |
9064 |
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CD |
CD-2610004 |
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CP |
CP-26 5113 |
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Distance |
140.06 |
|
Distance ly |
456.88 |
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ORBITAL ELEMENTS
Period (P) | 200.72y | ± 17.44 |
Periastron (T) | 2057.91y | ± 10.04 |
Semi-major axis (a) | 0.773a | ± 0.043 |
Eccentricity (e) | 0.725 | ± 0.023 |
Inclination (i) | 117.3° | ± 1.3 |
Longitude of periastron (ω) | 83.9° | ± 1.1 |
Node (Ω) | 165.9° | ± 8.6 |
Notes | n | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
228.8 |
0.582 |
2001 |
227.8 |
0.582 |
2002 |
226.8 |
0.582 |
2003 |
225.8 |
0.581 |
2004 |
224.8 |
0.581 |
2005 |
223.8 |
0.581 |
2006 |
222.8 |
0.580 |
2007 |
221.8 |
0.580 |
2008 |
220.8 |
0.580 |
2009 |
219.8 |
0.579 |
2010 |
218.7 |
0.579 |
2011 |
217.7 |
0.578 |
2012 |
216.7 |
0.578 |
2013 |
215.7 |
0.577 |
2014 |
214.7 |
0.577 |
2015 |
213.7 |
0.576 |
2016 |
212.7 |
0.575 |
2017 |
211.6 |
0.574 |
2018 |
210.6 |
0.573 |
2019 |
209.6 |
0.572 |
2020 |
208.5 |
0.571 |
2021 |
207.5 |
0.570 |
2022 |
206.4 |
0.569 |
2023 |
205.4 |
0.567 |
2024 |
204.3 |
0.565 |
2025 |
203.3 |
0.563 |
2026 |
202.2 |
0.561 |
2027 |
201.1 |
0.559 |
2028 |
200.0 |
0.557 |
2029 |
198.9 |
0.554 |
2030 |
197.8 |
0.551 |
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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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