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 |
|
Discov num |
HDS 198 |
|
Comp |
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Coord arcsec 2000 |
01 31 10.70 -07 01 58.0 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
13 |
|
| Pa first |
190 |
|
Pa last |
113.9 |
|
P.A. Now (θ) |
113.9° |
|
| Sep first |
0.2 |
|
Sep last |
0.049 |
|
Sep. Now (ρ) |
0.049" |
|
| Mag pri |
8.19 |
|
Mag sec |
9.79 |
|
delta mag (ΔM) |
1.6 |
|
Spectral class |
K0 (yellow-orange) |
|
| Pri motion ra |
-001 |
|
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 |
|
Constellation |
Cetus |
|
SAO |
129345 |
|
HIP |
7075 |
|
| Tycho2 |
4687-00409-1 |
|
Gaia DR2 |
2477926238342739968 |
|
HD |
9278 |
|
BD |
BD-07 246 |
|
| Distance |
105.26 |
|
Distance ly |
343.36 |
|
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 |
| 2031 |
219.5 |
0.056 |
| 2032 |
210.3 |
0.089 |
| 2033 |
205.9 |
0.116 |
| 2034 |
203.0 |
0.140 |
| 2035 |
201.0 |
0.160 |
| 2036 |
199.4 |
0.177 |
| 2037 |
198.0 |
0.191 |
| 2038 |
196.8 |
0.203 |
| 2039 |
195.8 |
0.214 |
| 2040 |
194.8 |
0.223 |
| 2041 |
193.9 |
0.230 |
| 2042 |
193.1 |
0.236 |
| 2043 |
192.3 |
0.241 |
| 2044 |
191.5 |
0.244 |
| 2045 |
190.7 |
0.247 |
| 2046 |
190.0 |
0.249 |
| 2047 |
189.2 |
0.249 |
| 2048 |
188.5 |
0.249 |
| 2049 |
187.8 |
0.248 |
| 2050 |
187.0 |
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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