04070-1000 HDS 521 AB
04h 07m 00.63s -10° 00' 00.4" P.A. 14.00 sep 0.2 mag 7.29,8.60 Sp G0+G8 dist. 40.83 pc (133.19 l.y.)
| Coord 2000 |
04070-1000 |
|
Discov num |
HDS 521 |
|
Comp |
AB |
|
Coord arcsec 2000 |
04 07 00.63 -10 00 00.4 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
47 |
|
| Pa first |
287 |
|
Pa last |
13.6 |
|
P.A. Now (θ) |
7.1° |
|
| Sep first |
0.2 |
|
Sep last |
0.227 |
|
Sep. Now (ρ) |
0.235" |
|
| Mag pri |
7.29 |
|
Mag sec |
8.60 |
|
delta mag (ΔM) |
1.31 |
|
Spectral class |
G0+G8 (yellow/yellow) |
|
| Pri motion ra |
-128 |
|
Sec motion ra |
|
|
| Pri motion dec |
-142 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
04070-1000 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
149379 |
04 07 01 -10 00 00 |
HDS 521 AB |
2021 |
47 |
14 |
0.2 |
7.29 |
8.60 |
1.31 |
Y |
<=== |
| Show |
HD 26040 |
149379 |
04 07 01 -10 00 00 |
SHY 165 AC |
1998 |
3 |
124 |
999.9 |
6.95 |
10.10 |
3.15 |
|
|
Triple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Eridanus |
|
SAO |
149379 |
|
HIP |
19206 |
|
Tycho2 |
5312-01785-1 |
|
| Gaia DR2 |
3190783297858653952 |
|
HD |
26040 |
|
GC |
4956 |
|
BD |
BD-10 839 |
|
| Distance |
40.83 |
|
Distance ly |
133.19 |
|
ORBITAL ELEMENTS
| Period (P) | 21.04y | ± 0.04 |
Periastron (T) | 2017.93y | ± 0.02 |
Semi-major axis (a) | 0.2302a | ± 0.002 |
| Eccentricity (e) | 0.712 | ± 0.004 |
Inclination (i) | 121.5° | ± 0.5 |
Longitude of periastron (ω) | 77.4° | ± 0.3 |
| Node (Ω) | 220.4° | ± 0.4 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
20.0 |
0.210 |
| 2001 |
13.0 |
0.227 |
| 2002 |
6.8 |
0.235 |
| 2003 |
0.9 |
0.239 |
| 2004 |
355.1 |
0.238 |
| 2005 |
349.1 |
0.234 |
| 2006 |
342.9 |
0.229 |
| 2007 |
336.4 |
0.222 |
| 2008 |
329.4 |
0.214 |
| 2009 |
321.8 |
0.206 |
| 2010 |
313.6 |
0.197 |
| 2011 |
304.7 |
0.189 |
| 2012 |
295.0 |
0.182 |
| 2013 |
284.6 |
0.175 |
| 2014 |
273.4 |
0.168 |
| 2015 |
261.0 |
0.160 |
| 2016 |
246.8 |
0.145 |
| 2017 |
227.0 |
0.111 |
| 2018 |
135.2 |
0.035 |
| 2019 |
43.7 |
0.123 |
| 2020 |
29.1 |
0.178 |
| 2021 |
20.3 |
0.209 |
| 2022 |
13.3 |
0.226 |
| 2023 |
7.1 |
0.235 |
| 2024 |
1.2 |
0.239 |
| 2025 |
355.3 |
0.238 |
| 2026 |
349.4 |
0.235 |
| 2027 |
343.2 |
0.229 |
| 2028 |
336.6 |
0.222 |
| 2029 |
329.7 |
0.214 |
| 2030 |
322.1 |
0.206 |
|
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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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