08342-0957 HDS 1226 (HD 72746)
08h 34m 09.35s -09° 57' 09.8" P.A. 307.00 sep 0.1 mag 8.00,9.29 Sp F2 dist. 100.3 pc (327.18 l.y.)
| Coord 2000 |
08342-0957 |
|
Discov num |
HDS1226 |
|
Comp |
|
|
Coord arcsec 2000 |
08 34 09.35 -09 57 09.8 |
|
| Date first |
1991 |
|
Date last |
2020 |
|
Obs |
9 |
|
| Pa first |
206 |
|
Pa last |
307 |
|
P.A. Now (θ) |
307° |
|
| Sep first |
0.2 |
|
Sep last |
0.134 |
|
Sep. Now (ρ) |
0.134" |
|
| Mag pri |
8.00 |
|
Mag sec |
9.29 |
|
delta mag (ΔM) |
1.29 |
|
Spectral class |
F2 (yellow-white) |
|
| Pri motion ra |
-019 |
|
Sec motion ra |
|
|
| Pri motion dec |
-001 |
|
Sec motion dec |
|
|
| Notes |
O
(Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 72746 |
|
Constellation |
Hydra |
|
SAO |
136051 |
|
HIP |
42037 |
|
| Tycho2 |
5433-01710-1 |
|
Gaia DR2 |
5751819038868932992 |
|
HD |
72746 |
|
BD |
BD-09 2574 |
|
| Distance |
100.3 |
|
Distance ly |
327.18 |
|
ORBITAL ELEMENTS
| Period (P) | 54.6y | |
Periastron (T) | 2003.13y | |
Semi-major axis (a) | 0.203a | |
| Eccentricity (e) | 0.386 | |
Inclination (i) | 119.5° | |
Longitude of periastron (ω) | 113.6° | |
| Node (Ω) | 202.6° | |
Notes | | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | 2019 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
154.4 |
0.083 |
| 2001 |
131.7 |
0.067 |
| 2002 |
101.5 |
0.063 |
| 2003 |
73.9 |
0.073 |
| 2004 |
55.2 |
0.091 |
| 2005 |
42.9 |
0.110 |
| 2006 |
34.2 |
0.127 |
| 2007 |
27.3 |
0.141 |
| 2008 |
21.6 |
0.151 |
| 2009 |
16.4 |
0.158 |
| 2010 |
11.6 |
0.161 |
| 2011 |
6.9 |
0.163 |
| 2012 |
2.2 |
0.162 |
| 2013 |
357.4 |
0.159 |
| 2014 |
352.4 |
0.156 |
| 2015 |
347.2 |
0.151 |
| 2016 |
341.7 |
0.147 |
| 2017 |
335.8 |
0.142 |
| 2018 |
329.5 |
0.138 |
| 2019 |
322.8 |
0.135 |
| 2020 |
315.9 |
0.132 |
| 2021 |
308.7 |
0.131 |
| 2022 |
301.5 |
0.130 |
| 2023 |
294.2 |
0.131 |
| 2024 |
287.2 |
0.133 |
| 2025 |
280.4 |
0.137 |
| 2026 |
274.0 |
0.141 |
| 2027 |
268.1 |
0.147 |
| 2028 |
262.6 |
0.153 |
| 2029 |
257.5 |
0.160 |
| 2030 |
252.9 |
0.167 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|
