03261+1229 A 829 (HD 21261)
03h 26m 08.81s +12° 28' 54.7" P.A. 56.00 sep 0.4 mag 8.82,10.38 Sp G0 dist. 68.73 pc (224.2 l.y.)
| Coord 2000 |
03261+1229 |
|
Discov num |
A 829 |
|
Comp |
|
|
Coord arcsec 2000 |
03 26 08.81 +12 28 54.7 |
|
| Date first |
1904 |
|
Date last |
2003 |
|
Obs |
24 |
|
| Pa first |
41 |
|
Pa last |
56 |
|
P.A. Now (θ) |
34° |
|
| Sep first |
0.3 |
|
Sep last |
0.387 |
|
Sep. Now (ρ) |
0.428" |
|
| Mag pri |
8.82 |
|
Mag sec |
10.38 |
|
delta mag (ΔM) |
1.56 |
|
Spectral class |
G0 (yellow) |
|
| Pri motion ra |
-072 |
|
Sec motion ra |
|
|
| Pri motion dec |
-023 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 21261 |
|
Constellation |
Taurus |
|
SAO |
93433 |
|
HIP |
16008 |
|
| Tycho2 |
0653-00556-1 |
|
Gaia DR2 |
16823940949244160 |
|
HD |
21261 |
|
ADS |
2531 |
|
| BD |
BD+11 474 |
|
Distance |
68.73 |
|
Distance ly |
224.2 |
|
ORBITAL ELEMENTS
| Period (P) | 111.38y | ± 3.93 |
Periastron (T) | 1985.1y | ± 0.79 |
Semi-major axis (a) | 0.417a | ± 0.012 |
| Eccentricity (e) | 0.743 | ± 0.018 |
Inclination (i) | 120.6° | ± 2 |
Longitude of periastron (ω) | 77.2° | ± 1.9 |
| Node (Ω) | 260.1° | ± 2.4 |
Notes | n | |
Reference | Hrt2008 | |
| Equinox | 2000 | |
Last observation | 2003 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
60.0 |
0.364 |
| 2001 |
58.6 |
0.372 |
| 2002 |
57.3 |
0.380 |
| 2003 |
56.0 |
0.386 |
| 2004 |
54.7 |
0.392 |
| 2005 |
53.5 |
0.398 |
| 2006 |
52.3 |
0.403 |
| 2007 |
51.1 |
0.407 |
| 2008 |
50.0 |
0.411 |
| 2009 |
48.8 |
0.414 |
| 2010 |
47.7 |
0.417 |
| 2011 |
46.6 |
0.420 |
| 2012 |
45.5 |
0.422 |
| 2013 |
44.5 |
0.424 |
| 2014 |
43.4 |
0.425 |
| 2015 |
42.4 |
0.427 |
| 2016 |
41.3 |
0.428 |
| 2017 |
40.3 |
0.428 |
| 2018 |
39.2 |
0.429 |
| 2019 |
38.2 |
0.429 |
| 2020 |
37.1 |
0.429 |
| 2021 |
36.1 |
0.429 |
| 2022 |
35.1 |
0.429 |
| 2023 |
34.0 |
0.428 |
| 2024 |
33.0 |
0.427 |
| 2025 |
31.9 |
0.426 |
| 2026 |
30.9 |
0.425 |
| 2027 |
29.8 |
0.424 |
| 2028 |
28.7 |
0.423 |
| 2029 |
27.7 |
0.421 |
| 2030 |
26.6 |
0.419 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
