03003-1118 A 2611 (HD 18740)
03h 00m 20.37s -11° 17' 39.3" P.A. 263.00 sep 0.1 mag 9.70,9.70 Sp G5
Coord 2000 |
03003-1118 |
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Discov num |
A 2611 |
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Comp |
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Coord arcsec 2000 |
03 00 20.37 -11 17 39.3 |
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Date first |
1913 |
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Date last |
2021 |
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Obs |
24 |
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Pa first |
0 |
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Pa last |
262.9 |
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P.A. Now (θ) |
272.5° |
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Sep first |
0.2 |
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Sep last |
0.107 |
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Sep. Now (ρ) |
0.095" |
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Mag pri |
9.70 |
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Mag sec |
9.70 |
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delta mag (ΔM) |
0 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
+026 |
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Sec motion ra |
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Pri motion dec |
-043 |
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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 18740 |
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Constellation |
Eridanus |
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SAO |
148713 |
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Tycho2 |
5290-00699-1 |
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Gaia DR2 |
5160670391765154688 |
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HD |
18740 |
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ADS |
2283 |
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ORBITAL ELEMENTS
Period (P) | 75.28y | |
Periastron (T) | 1954.11y | |
Semi-major axis (a) | 0.14a | |
Eccentricity (e) | 0.577 | |
Inclination (i) | 23.4° | |
Longitude of periastron (ω) | 316.5° | |
Node (Ω) | 53.3° | |
Notes | | |
Reference | Tok2017c | |
Equinox | 2000 | |
Last observation | 2017 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
205.2 |
0.209 |
2001 |
206.8 |
0.207 |
2002 |
208.4 |
0.205 |
2003 |
210.1 |
0.203 |
2004 |
211.8 |
0.201 |
2005 |
213.6 |
0.198 |
2006 |
215.4 |
0.196 |
2007 |
217.3 |
0.192 |
2008 |
219.2 |
0.189 |
2009 |
221.2 |
0.185 |
2010 |
223.3 |
0.181 |
2011 |
225.5 |
0.177 |
2012 |
227.8 |
0.172 |
2013 |
230.3 |
0.167 |
2014 |
232.9 |
0.162 |
2015 |
235.7 |
0.156 |
2016 |
238.7 |
0.150 |
2017 |
242.0 |
0.143 |
2018 |
245.6 |
0.136 |
2019 |
249.6 |
0.128 |
2020 |
254.1 |
0.121 |
2021 |
259.3 |
0.112 |
2022 |
265.3 |
0.104 |
2023 |
272.5 |
0.095 |
2024 |
281.1 |
0.086 |
2025 |
291.8 |
0.077 |
2026 |
305.2 |
0.069 |
2027 |
321.9 |
0.062 |
2028 |
341.9 |
0.057 |
2029 |
3.7 |
0.056 |
2030 |
25.1 |
0.059 |
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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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