00090-5400 HDO 181 (HD 469)
00h 09m 02.35s -54° 00' 07.1" P.A. 15.00 sep 0.4 mag 6.74,8.07 Sp G4IV dist. 128.37 pc (418.74 l.y.)
Coord 2000 |
00090-5400 |
|
Discov num |
HDO 181 |
|
Comp |
|
|
Coord arcsec 2000 |
00 09 02.35 -54 00 07.1 |
|
Date first |
1897 |
|
Date last |
2018 |
|
Obs |
47 |
|
Pa first |
300 |
|
Pa last |
15.4 |
|
P.A. Now (θ) |
8.5° |
|
Sep first |
1.2 |
|
Sep last |
0.382 |
|
Sep. Now (ρ) |
0.4" |
|
Mag pri |
6.74 |
|
Mag sec |
8.07 |
|
delta mag (ΔM) |
1.33 |
|
Spectral class |
G4IV (yellow) |
|
Pri motion ra |
+047 |
|
Sec motion ra |
|
|
Pri motion dec |
+017 |
|
Sec motion dec |
|
|
Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 469 |
|
Constellation |
Phoenix |
|
SAO |
231943 |
|
HIP |
730 |
|
Tycho2 |
8464-00766-1 |
|
Gaia DR2 |
4923991064959730816 |
|
HD |
469 |
|
HR |
23 |
|
GC |
148 |
|
CP |
CP-54 19 |
|
Distance |
128.37 |
|
Distance ly |
418.74 |
|
ORBITAL ELEMENTS
Period (P) | 201.9y | |
Periastron (T) | 1981.29y | |
Semi-major axis (a) | 0.4a | |
Eccentricity (e) | 0.38 | |
Inclination (i) | 158.6° | |
Longitude of periastron (ω) | 13.2° | |
Node (Ω) | 141.5° | |
Notes | n | |
Reference | Alz2020b | |
Equinox | 2000 | |
Last observation | 2018 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
59.1 |
0.282 |
2001 |
56.1 |
0.286 |
2002 |
53.1 |
0.291 |
2003 |
50.2 |
0.295 |
2004 |
47.5 |
0.300 |
2005 |
44.8 |
0.305 |
2006 |
42.2 |
0.310 |
2007 |
39.7 |
0.315 |
2008 |
37.2 |
0.320 |
2009 |
34.9 |
0.325 |
2010 |
32.6 |
0.331 |
2011 |
30.4 |
0.336 |
2012 |
28.2 |
0.341 |
2013 |
26.2 |
0.347 |
2014 |
24.2 |
0.352 |
2015 |
22.2 |
0.358 |
2016 |
20.3 |
0.363 |
2017 |
18.5 |
0.368 |
2018 |
16.7 |
0.374 |
2019 |
15.0 |
0.379 |
2020 |
13.3 |
0.384 |
2021 |
11.6 |
0.390 |
2022 |
10.0 |
0.395 |
2023 |
8.5 |
0.400 |
2024 |
7.0 |
0.405 |
2025 |
5.5 |
0.410 |
2026 |
4.0 |
0.415 |
2027 |
2.6 |
0.420 |
2028 |
1.2 |
0.425 |
2029 |
359.9 |
0.429 |
2030 |
358.6 |
0.434 |
|
|
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
|
|
|
|
|
|
|
|
Measures: green=micrometric, blue=interferometric, purple=photographic |
|