04464+4221 COU 2031 (HD 30090)
04h 46m 26.92s +42° 20' 54.2" P.A. 28.00 sep 0.0 mag 6.90,7.80 Sp G0 dist. 67.07 pc (218.78 l.y.)
| Coord 2000 |
04464+4221 |
|
Discov num |
COU2031 |
|
Comp |
|
|
Coord arcsec 2000 |
04 46 26.92 +42 20 54.2 |
|
| Date first |
1981 |
|
Date last |
2011 |
|
Obs |
30 |
|
| Pa first |
148 |
|
Pa last |
28.3 |
|
P.A. Now (θ) |
157.2° |
|
| Sep first |
0.1 |
|
Sep last |
0.021 |
|
Sep. Now (ρ) |
0.114" |
|
| Mag pri |
6.90 |
|
Mag sec |
7.80 |
|
delta mag (ΔM) |
0.9 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
+001 |
|
Sec motion ra |
|
|
| Pri motion dec |
+064 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 30090 |
|
Constellation |
Perseus |
|
SAO |
39741 |
|
HIP |
22196 |
|
| Tycho2 |
2901-02232-1 |
|
Gaia DR2 |
203719133602370944 |
|
HD |
30090 |
|
GC |
5795 |
|
| GL |
NN 3312 |
|
BD |
BD+42 1045 |
|
Distance |
67.07 |
|
Distance ly |
218.78 |
|
ORBITAL ELEMENTS
| Period (P) | 20.58y | ± 0.06 |
Periastron (T) | 2008.98y | ± 0.09 |
Semi-major axis (a) | 0.1499a | ± 0.0005 |
| Eccentricity (e) | 0.274 | ± 0.008 |
Inclination (i) | 81.8° | ± 0.3 |
Longitude of periastron (ω) | 188.9° | ± 2.5 |
| Node (Ω) | 147.6° | ± 0.5 |
Notes | n | |
Reference | Doc2014i | |
| Equinox | 2000 | |
Last observation | 2012 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
151.0 |
0.175 |
| 2001 |
153.0 |
0.155 |
| 2002 |
155.7 |
0.128 |
| 2003 |
160.1 |
0.094 |
| 2004 |
170.5 |
0.055 |
| 2005 |
221.2 |
0.022 |
| 2006 |
302.5 |
0.043 |
| 2007 |
318.1 |
0.080 |
| 2008 |
324.3 |
0.104 |
| 2009 |
329.0 |
0.107 |
| 2010 |
334.6 |
0.086 |
| 2011 |
347.5 |
0.047 |
| 2012 |
69.5 |
0.020 |
| 2013 |
127.1 |
0.056 |
| 2014 |
136.9 |
0.098 |
| 2015 |
141.0 |
0.133 |
| 2016 |
143.5 |
0.160 |
| 2017 |
145.4 |
0.179 |
| 2018 |
147.0 |
0.189 |
| 2019 |
148.5 |
0.190 |
| 2020 |
150.0 |
0.183 |
| 2021 |
151.8 |
0.167 |
| 2022 |
154.0 |
0.144 |
| 2023 |
157.2 |
0.114 |
| 2024 |
163.2 |
0.078 |
| 2025 |
181.2 |
0.039 |
| 2026 |
270.6 |
0.024 |
| 2027 |
311.4 |
0.059 |
| 2028 |
321.1 |
0.092 |
| 2029 |
326.3 |
0.109 |
| 2030 |
331.0 |
0.101 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
