02057-2423 I 454 AB (HD 12889)
02h 05m 41.51s -24° 22' 33.8" P.A. 166.00 sep 0.5 mag 8.62,11.32 Sp G9+G9+K5V dist. 46.64 pc (152.14 l.y.)
Coord 2000 |
02057-2423 |
|
Discov num |
I 454 |
|
Comp |
AB |
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Coord arcsec 2000 |
02 05 41.51 -24 22 33.8 |
|
Date first |
1909 |
|
Date last |
2021 |
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Obs |
45 |
|
Pa first |
140 |
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Pa last |
166.4 |
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P.A. Now (θ) |
166.4° |
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Sep first |
1.2 |
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Sep last |
0.51 |
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Sep. Now (ρ) |
0.51" |
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Mag pri |
8.62 |
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Mag sec |
11.32 |
|
delta mag (ΔM) |
2.7 |
|
Spectral class |
G9+G9+K5V (yellow/yellow) |
|
Pri motion ra |
+419 |
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Sec motion ra |
+420 |
|
Pri motion dec |
-064 |
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Sec motion dec |
-057 |
|
Notes |
N
O
(See Notes, Orbital solution) |
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rPM=0.017 (< 0.3, Physical double)
This double is physical.
02057-2423 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
|
167545 |
02 05 42 -24 22 34 |
WSI 71 Aa,Ab |
2021 |
23 |
214 |
0.0 |
9.27 |
9.50 |
0.23 |
Y |
|
Show |
HD 12889 |
167545 |
02 05 42 -24 22 34 |
I 454 AB |
2021 |
45 |
166 |
0.5 |
8.62 |
11.32 |
2.70 |
Y |
<=== |
Show |
|
167545 |
02 05 42 -24 22 34 |
I 454 AB,C |
2015 |
19 |
257 |
56.6 |
8.62 |
8.96 |
0.34 |
|
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Quintuple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 12889 |
|
Constellation |
Fornax |
|
SAO |
167545 |
|
HIP |
9774 |
|
Tycho2 |
6430-00057-1 |
|
HD |
12889 |
|
ADS |
1652 |
|
CD |
CD-24 891 |
|
CP |
CP-24 237 |
|
Distance |
46.64 |
|
Distance ly |
152.14 |
|
ORBITAL ELEMENTS
Period (P) | 213y | ± 213 |
Periastron (T) | 2057y | ± 43 |
Semi-major axis (a) | 1.03a | ± 0.66 |
Eccentricity (e) | 0.45 | ± 0.84 |
Inclination (i) | 76° | ± 11 |
Longitude of periastron (ω) | 175° | ± 85 |
Node (Ω) | 140° | ± 8 |
Notes | n | |
Reference | Tok2014b | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
149.6 |
1.043 |
2001 |
150.0 |
1.022 |
2002 |
150.3 |
1.002 |
2003 |
150.7 |
0.980 |
2004 |
151.1 |
0.959 |
2005 |
151.6 |
0.937 |
2006 |
152.0 |
0.914 |
2007 |
152.5 |
0.891 |
2008 |
153.0 |
0.868 |
2009 |
153.5 |
0.844 |
2010 |
154.1 |
0.819 |
2011 |
154.7 |
0.795 |
2012 |
155.3 |
0.769 |
2013 |
156.0 |
0.744 |
2014 |
156.7 |
0.718 |
2015 |
157.5 |
0.691 |
2016 |
158.3 |
0.664 |
2017 |
159.3 |
0.637 |
2018 |
160.3 |
0.610 |
2019 |
161.4 |
0.582 |
2020 |
162.6 |
0.554 |
2021 |
163.9 |
0.526 |
2022 |
165.4 |
0.497 |
2023 |
167.0 |
0.468 |
2024 |
168.9 |
0.440 |
2025 |
171.1 |
0.411 |
2026 |
173.5 |
0.383 |
2027 |
176.4 |
0.355 |
2028 |
179.7 |
0.327 |
2029 |
183.6 |
0.301 |
2030 |
188.3 |
0.276 |
|
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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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