04163+0710 WSI 97 (HD 26990)
04h 16m 16.55s +07° 09' 34.5" P.A. 144.00 sep 0.2 mag 7.70,9.70 Sp G0 dist. 30.64 pc (99.95 l.y.)
| Coord 2000 |
04163+0710 |
|
Discov num |
WSI 97 |
|
Comp |
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Coord arcsec 2000 |
04 16 16.55 +07 09 34.5 |
|
| Date first |
2001 |
|
Date last |
2021 |
|
Obs |
18 |
|
| Pa first |
123 |
|
Pa last |
144.4 |
|
P.A. Now (θ) |
144.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.16 |
|
Sep. Now (ρ) |
0.16" |
|
| Mag pri |
7.70 |
|
Mag sec |
9.70 |
|
delta mag (ΔM) |
2 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-091 |
|
Sec motion ra |
|
|
| Pri motion dec |
-043 |
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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 26990 |
|
Constellation |
Taurus |
|
SAO |
111707 |
|
HIP |
19911 |
|
| Tycho2 |
0080-01377-1 |
|
Gaia DR2 |
3297396274614449920 |
|
HD |
26990 |
|
GC |
5156 |
|
| BD |
BD+06 652 |
|
Distance |
30.64 |
|
Distance ly |
99.95 |
|
ORBITAL ELEMENTS
| Period (P) | 5.6805y | ± 0.0058 |
Periastron (T) | 1997.088y | ± 0.011 |
Semi-major axis (a) | 0.1011a | ± 0.0009 |
| Eccentricity (e) | 0.808 | ± 0.005 |
Inclination (i) | 148° | |
Longitude of periastron (ω) | 47.6° | ± 1.7 |
| Node (Ω) | 358.1° | ± 1.7 |
Notes | n | |
Reference | Tok2015c | |
| Equinox | 2000 | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
134.4 |
0.168 |
| 2001 |
121.6 |
0.146 |
| 2002 |
98.7 |
0.092 |
| 2003 |
197.0 |
0.048 |
| 2004 |
155.9 |
0.137 |
| 2005 |
142.2 |
0.166 |
| 2006 |
130.6 |
0.164 |
| 2007 |
116.3 |
0.133 |
| 2008 |
81.7 |
0.065 |
| 2009 |
173.4 |
0.088 |
| 2010 |
150.9 |
0.150 |
| 2011 |
138.5 |
0.169 |
| 2012 |
126.6 |
0.157 |
| 2013 |
109.6 |
0.116 |
| 2014 |
32.8 |
0.032 |
| 2015 |
163.3 |
0.115 |
| 2016 |
146.6 |
0.160 |
| 2017 |
134.9 |
0.168 |
| 2018 |
122.2 |
0.148 |
| 2019 |
100.3 |
0.095 |
| 2020 |
203.7 |
0.041 |
| 2021 |
156.6 |
0.134 |
| 2022 |
142.7 |
0.166 |
| 2023 |
131.1 |
0.165 |
| 2024 |
117.0 |
0.135 |
| 2025 |
84.7 |
0.069 |
| 2026 |
175.2 |
0.083 |
| 2027 |
151.5 |
0.149 |
| 2028 |
139.0 |
0.168 |
| 2029 |
127.2 |
0.158 |
| 2030 |
110.6 |
0.118 |
|
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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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