04021-3429 BU 1004 AB (HD 25535)
04h 02m 03.44s -34° 28' 55.7" P.A. 45.00 sep 1.1 mag 7.26,7.94 Sp G1/2V dist. 51.68 pc (168.58 l.y.)
Coord 2000 |
04021-3429 |
|
Discov num |
BU 1004 |
|
Comp |
AB |
|
Coord arcsec 2000 |
04 02 03.44 -34 28 55.7 |
|
Date first |
1881 |
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Date last |
2021 |
|
Obs |
95 |
|
Pa first |
154 |
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Pa last |
44.9 |
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P.A. Now (θ) |
44.9° |
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Sep first |
1.8 |
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Sep last |
1.102 |
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Sep. Now (ρ) |
1.102" |
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Mag pri |
7.26 |
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Mag sec |
7.94 |
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delta mag (ΔM) |
0.68 |
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Spectral class |
G1/2V (yellow) |
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Pri motion ra |
+374 |
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Sec motion ra |
+374 |
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Pri motion dec |
-012 |
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Sec motion dec |
-012 |
|
Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
04021-3429 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 25535 |
194709 |
04 02 03 -34 28 56 |
BU 1004 AB |
2021 |
95 |
45 |
1.1 |
7.26 |
7.94 |
0.68 |
Y |
<=== |
Show |
|
194709 |
04 02 03 -34 28 56 |
BU 1004 AC |
2015 |
16 |
171 |
40.5 |
7.26 |
11.49 |
4.23 |
|
|
Show |
|
194709 |
04 02 03 -34 28 56 |
LDS 3551 AD |
2015 |
3 |
313 |
64.2 |
7.26 |
17.80 |
10.54 |
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Quadruple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 25535 |
|
Constellation |
Eridanus |
|
SAO |
194709 |
|
HIP |
18824 |
|
Tycho2 |
7033-01517-1 |
|
HD |
25535 |
|
GC |
4853 |
|
CD |
CD-34 1491 |
|
Distance |
51.68 |
|
Distance ly |
168.58 |
|
ORBITAL ELEMENTS
Period (P) | 393.4481y | ± 171.921 |
Periastron (T) | 2045.0551y | ± 10.2052 |
Semi-major axis (a) | 1.74415a | ± 0.34539 |
Eccentricity (e) | 0.50566 | ± 0.13326 |
Inclination (i) | 136.38° | ± 9.411 |
Longitude of periastron (ω) | 63.95° | ± 14.492 |
Node (Ω) | 44.176° | ± 26.634 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
71.5 |
1.297 |
2001 |
70.4 |
1.289 |
2002 |
69.4 |
1.282 |
2003 |
68.3 |
1.274 |
2004 |
67.2 |
1.265 |
2005 |
66.1 |
1.257 |
2006 |
65.0 |
1.248 |
2007 |
63.9 |
1.239 |
2008 |
62.8 |
1.230 |
2009 |
61.6 |
1.220 |
2010 |
60.4 |
1.210 |
2011 |
59.2 |
1.200 |
2012 |
58.0 |
1.190 |
2013 |
56.8 |
1.179 |
2014 |
55.5 |
1.168 |
2015 |
54.2 |
1.156 |
2016 |
52.9 |
1.144 |
2017 |
51.6 |
1.132 |
2018 |
50.2 |
1.119 |
2019 |
48.8 |
1.106 |
2020 |
47.3 |
1.092 |
2021 |
45.9 |
1.078 |
2022 |
44.4 |
1.064 |
2023 |
42.8 |
1.049 |
2024 |
41.2 |
1.034 |
2025 |
39.5 |
1.018 |
2026 |
37.8 |
1.002 |
2027 |
36.1 |
0.986 |
2028 |
34.3 |
0.969 |
2029 |
32.4 |
0.951 |
2030 |
30.4 |
0.934 |
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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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