04188-3407 I 724 (HD 27470)
04h 18m 47.63s -34° 07' 16.7" P.A. 224.00 sep 0.1 mag 8.30,9.30 Sp G1V dist. 257.07 pc (838.56 l.y.)
Coord 2000 |
04188-3407 |
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Discov num |
I 724 |
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Comp |
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Coord arcsec 2000 |
04 18 47.63 -34 07 16.7 |
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Date first |
1910 |
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Date last |
2021 |
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Obs |
12 |
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Pa first |
200 |
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Pa last |
223.5 |
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P.A. Now (θ) |
223.5° |
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Sep first |
0.5 |
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Sep last |
0.113 |
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Sep. Now (ρ) |
0.113" |
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Mag pri |
8.30 |
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Mag sec |
9.30 |
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delta mag (ΔM) |
1 |
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Spectral class |
G1V (yellow) |
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Pri motion ra |
+021 |
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Sec motion ra |
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Pri motion dec |
+021 |
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Sec motion dec |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 27470 |
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Constellation |
Eridanus |
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SAO |
194919 |
|
HIP |
20116 |
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Tycho2 |
7040-01357-1 |
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Gaia DR2 |
4870503947436774400 |
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HD |
27470 |
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GC |
5222 |
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CD |
CD-34 1622 |
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CP |
CP-34 469 |
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Distance |
257.07 |
|
Distance ly |
838.56 |
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ORBITAL ELEMENTS
Period (P) | 180y | |
Periastron (T) | 1978.86y | |
Semi-major axis (a) | 0.408a | |
Eccentricity (e) | 0.79 | |
Inclination (i) | 93.7° | |
Longitude of periastron (ω) | 121.6° | |
Node (Ω) | 203.9° | |
Notes | | |
Reference | Tok2021f | |
Equinox | | |
Last observation | 2021 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
358.6 |
0.059 |
2001 |
354.4 |
0.053 |
2002 |
349.0 |
0.047 |
2003 |
342.2 |
0.041 |
2004 |
333.5 |
0.037 |
2005 |
322.5 |
0.033 |
2006 |
309.3 |
0.031 |
2007 |
294.9 |
0.030 |
2008 |
281.0 |
0.032 |
2009 |
268.9 |
0.035 |
2010 |
259.1 |
0.039 |
2011 |
251.4 |
0.044 |
2012 |
245.4 |
0.050 |
2013 |
240.7 |
0.056 |
2014 |
236.9 |
0.062 |
2015 |
233.9 |
0.069 |
2016 |
231.3 |
0.076 |
2017 |
229.2 |
0.083 |
2018 |
227.5 |
0.089 |
2019 |
225.9 |
0.096 |
2020 |
224.6 |
0.103 |
2021 |
223.4 |
0.110 |
2022 |
222.4 |
0.117 |
2023 |
221.5 |
0.124 |
2024 |
220.7 |
0.131 |
2025 |
220.0 |
0.138 |
2026 |
219.3 |
0.145 |
2027 |
218.7 |
0.151 |
2028 |
218.2 |
0.158 |
2029 |
217.7 |
0.165 |
2030 |
217.2 |
0.172 |
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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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