01312-0702 HDS 198 (HD 9278)
01h 31m 10.70s -07° 01' 58.0" P.A. 114.00 sep 0.0 mag 8.19,9.79 Sp K0 dist. 105.26 pc (343.36 l.y.)
Coord 2000 |
01312-0702 |
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Discov num |
HDS 198 |
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Comp |
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Coord arcsec 2000 |
01 31 10.70 -07 01 58.0 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
13 |
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Pa first |
190 |
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Pa last |
113.9 |
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P.A. Now (θ) |
113.9° |
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Sep first |
0.2 |
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Sep last |
0.049 |
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Sep. Now (ρ) |
0.049" |
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Mag pri |
8.19 |
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Mag sec |
9.79 |
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delta mag (ΔM) |
1.6 |
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Spectral class |
K0 (yellow-orange) |
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Pri motion ra |
-001 |
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Sec motion ra |
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Pri motion dec |
-015 |
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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 9278 |
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Constellation |
Cetus |
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SAO |
129345 |
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HIP |
7075 |
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Tycho2 |
4687-00409-1 |
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Gaia DR2 |
2477926238342739968 |
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HD |
9278 |
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BD |
BD-07 246 |
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Distance |
105.26 |
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Distance ly |
343.36 |
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ORBITAL ELEMENTS
Period (P) | 51.6y | |
Periastron (T) | 2028.8y | |
Semi-major axis (a) | 0.176a | |
Eccentricity (e) | 0.7 | |
Inclination (i) | 107.3° | |
Longitude of periastron (ω) | 42.4° | |
Node (Ω) | 18.5° | |
Notes | | |
Reference | Tok2018i | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
185.8 |
0.242 |
2001 |
185.0 |
0.238 |
2002 |
184.2 |
0.234 |
2003 |
183.3 |
0.229 |
2004 |
182.4 |
0.223 |
2005 |
181.5 |
0.217 |
2006 |
180.5 |
0.210 |
2007 |
179.4 |
0.203 |
2008 |
178.2 |
0.195 |
2009 |
177.0 |
0.186 |
2010 |
175.6 |
0.177 |
2011 |
174.0 |
0.167 |
2012 |
172.3 |
0.157 |
2013 |
170.3 |
0.147 |
2014 |
168.0 |
0.136 |
2015 |
165.3 |
0.124 |
2016 |
162.0 |
0.113 |
2017 |
157.9 |
0.101 |
2018 |
152.8 |
0.089 |
2019 |
146.2 |
0.077 |
2020 |
137.3 |
0.067 |
2021 |
125.2 |
0.057 |
2022 |
109.2 |
0.051 |
2023 |
90.2 |
0.048 |
2024 |
70.9 |
0.050 |
2025 |
54.3 |
0.055 |
2026 |
40.9 |
0.062 |
2027 |
29.7 |
0.065 |
2028 |
18.1 |
0.059 |
2029 |
356.7 |
0.034 |
2030 |
258.5 |
0.022 |
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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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