03236-4005 I 468 (HD 21175)
03h 23m 35.23s -40° 04' 35.4" P.A. 127.00 sep 2.8 mag 6.80,11.00 Sp K0V dist. 17.42 pc (56.82 l.y.)
Coord 2000 |
03236-4005 |
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Discov num |
I 468 |
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Comp |
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Coord arcsec 2000 |
03 23 35.23 -40 04 35.4 |
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Date first |
1909 |
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Date last |
2021 |
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Obs |
24 |
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Pa first |
210 |
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Pa last |
127.1 |
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P.A. Now (θ) |
127.1° |
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Sep first |
2.0 |
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Sep last |
2.849 |
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Sep. Now (ρ) |
2.849" |
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Mag pri |
6.80 |
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Mag sec |
11.00 |
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delta mag (ΔM) |
4.2 |
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Spectral class |
K0V (yellow-orange) |
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Pri motion ra |
+073 |
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Sec motion ra |
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Pri motion dec |
-026 |
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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 |
HD 21175 |
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Constellation |
Eridanus |
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SAO |
216292 |
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HIP |
15799 |
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Tycho2 |
7571-00425-1 |
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Gaia DR2 |
4852870701504645376 |
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HD |
21175 |
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GC |
4061 |
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GL |
NN 3222A |
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CD |
CD-40 898 |
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CP |
CP-40 310 |
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Distance |
17.42 |
|
Distance ly |
56.82 |
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ORBITAL ELEMENTS
Period (P) | 217.702y | ± 31.3008 |
Periastron (T) | 1970.7215y | ± 1.4622 |
Semi-major axis (a) | 2.32852a | ± 0.10837 |
Eccentricity (e) | 0.48485 | ± 0.06404 |
Inclination (i) | 41.816° | ± 3.627 |
Longitude of periastron (ω) | 230.607° | ± 13.28 |
Node (Ω) | 121.616° | ± 11.983 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
103.2 |
1.964 |
2001 |
104.6 |
2.010 |
2002 |
106.0 |
2.055 |
2003 |
107.4 |
2.098 |
2004 |
108.7 |
2.140 |
2005 |
110.0 |
2.182 |
2006 |
111.2 |
2.222 |
2007 |
112.3 |
2.261 |
2008 |
113.5 |
2.299 |
2009 |
114.5 |
2.336 |
2010 |
115.6 |
2.371 |
2011 |
116.6 |
2.406 |
2012 |
117.6 |
2.440 |
2013 |
118.6 |
2.472 |
2014 |
119.5 |
2.504 |
2015 |
120.4 |
2.534 |
2016 |
121.3 |
2.564 |
2017 |
122.2 |
2.593 |
2018 |
123.1 |
2.620 |
2019 |
123.9 |
2.647 |
2020 |
124.8 |
2.673 |
2021 |
125.6 |
2.698 |
2022 |
126.4 |
2.721 |
2023 |
127.1 |
2.744 |
2024 |
127.9 |
2.767 |
2025 |
128.7 |
2.788 |
2026 |
129.4 |
2.808 |
2027 |
130.2 |
2.828 |
2028 |
130.9 |
2.847 |
2029 |
131.6 |
2.865 |
2030 |
132.3 |
2.882 |
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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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