02512+0141 A 2338 (HD 17780)
02h 51m 11.57s +01° 40' 49.5" P.A. 21.00 sep 0.2 mag 9.90,10.60 Sp F5 dist. 131.41 pc (428.66 l.y.)
Coord 2000 |
02512+0141 |
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Discov num |
A 2338 |
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Comp |
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Coord arcsec 2000 |
02 51 11.57 +01 40 49.5 |
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Date first |
1911 |
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Date last |
2017 |
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Obs |
18 |
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Pa first |
107 |
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Pa last |
21.2 |
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P.A. Now (θ) |
36.8° |
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Sep first |
0.5 |
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Sep last |
0.176 |
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Sep. Now (ρ) |
0.205" |
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Mag pri |
9.90 |
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Mag sec |
10.60 |
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delta mag (ΔM) |
0.7 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
+006 |
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Sec motion ra |
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Pri motion dec |
-010 |
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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 17780 |
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Constellation |
Cetus |
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SAO |
110789 |
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HIP |
13302 |
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Tycho2 |
0048-00276-1 |
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Gaia DR2 |
2499213882968076544 |
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HD |
17780 |
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ADS |
2177 |
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DM |
BD+01 502 |
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BD |
BD+01 501 |
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Distance |
131.41 |
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Distance ly |
428.66 |
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ORBITAL ELEMENTS
Period (P) | 180y | |
Periastron (T) | 2005.98y | |
Semi-major axis (a) | 0.308a | |
Eccentricity (e) | 0.736 | |
Inclination (i) | 38.3° | |
Longitude of periastron (ω) | 119.3° | |
Node (Ω) | 157.3° | |
Notes | | |
Reference | Doc2016a | |
Equinox | 2000 | |
Last observation | 2015 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
187.6 |
0.120 |
2001 |
195.6 |
0.106 |
2002 |
206.1 |
0.092 |
2003 |
220.0 |
0.079 |
2004 |
238.4 |
0.070 |
2005 |
260.7 |
0.066 |
2006 |
283.3 |
0.069 |
2007 |
302.8 |
0.076 |
2008 |
318.2 |
0.086 |
2009 |
330.4 |
0.097 |
2010 |
340.1 |
0.107 |
2011 |
348.2 |
0.117 |
2012 |
355.1 |
0.126 |
2013 |
1.0 |
0.134 |
2014 |
6.3 |
0.143 |
2015 |
11.0 |
0.150 |
2016 |
15.2 |
0.158 |
2017 |
19.1 |
0.165 |
2018 |
22.6 |
0.172 |
2019 |
25.9 |
0.179 |
2020 |
28.9 |
0.186 |
2021 |
31.7 |
0.193 |
2022 |
34.3 |
0.199 |
2023 |
36.8 |
0.205 |
2024 |
39.1 |
0.211 |
2025 |
41.3 |
0.217 |
2026 |
43.4 |
0.223 |
2027 |
45.3 |
0.229 |
2028 |
47.2 |
0.235 |
2029 |
49.0 |
0.241 |
2030 |
50.7 |
0.246 |
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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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