21074-0814 BU 368 AB (HD 201038)
21h 07m 26.28s -08° 14' 05.6" P.A. 312.00 sep 0.0 mag 7.56,8.24 Sp A0 dist. 117.65 pc (383.77 l.y.)
Coord 2000 |
21074-0814 |
|
Discov num |
BU 368 |
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Comp |
AB |
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Coord arcsec 2000 |
21 07 26.28 -08 14 05.6 |
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Date first |
1875 |
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Date last |
2021 |
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Obs |
78 |
|
Pa first |
100 |
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Pa last |
311.8 |
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P.A. Now (θ) |
318.2° |
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Sep first |
0.5 |
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Sep last |
0.05 |
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Sep. Now (ρ) |
0.039" |
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Mag pri |
7.56 |
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Mag sec |
8.24 |
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delta mag (ΔM) |
0.68 |
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Spectral class |
A0 (white) |
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Pri motion ra |
-019 |
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Sec motion ra |
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Pri motion dec |
-007 |
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Sec motion dec |
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Notes |
N
O
(See Notes, Orbital solution) |
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This double is physical.
21074-0814 SYSTEM COMPONENTS
Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
Show |
HD 201038 |
145118 |
21 07 26 -08 14 06 |
BU 368 AB |
2021 |
78 |
312 |
0.0 |
7.56 |
8.24 |
0.68 |
Y |
<=== |
Show |
|
145118 |
21 07 26 -08 14 06 |
BU 368 AC |
2004 |
5 |
39 |
15.6 |
7.56 |
14.10 |
6.54 |
|
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Show |
|
145118 |
21 07 26 -08 14 06 |
POP 227 AB,E |
2004 |
3 |
117 |
51.3 |
7.56 |
14.92 |
7.36 |
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Show |
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21 07 27 -08 13 53 |
BU 368 CD |
2015 |
9 |
298 |
6.0 |
14.10 |
14.80 |
0.70 |
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Quintuple system
6 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 201038 |
|
Constellation |
Aquarius |
|
SAO |
145118 |
|
HIP |
104272 |
|
Tycho2 |
5771-01610-1 |
|
Gaia DR2 |
6897081208037262592 |
|
HD |
201038 |
|
GC |
29515 |
|
ADS |
14648 |
|
BD |
BD-08 5581 |
|
Distance |
117.65 |
|
Distance ly |
383.77 |
|
ORBITAL ELEMENTS
Period (P) | 345.28y | ± 15.75 |
Periastron (T) | 1954.64y | ± 1.11 |
Semi-major axis (a) | 0.576a | ± 0.013 |
Eccentricity (e) | 0.665 | ± 0.02 |
Inclination (i) | 87.6° | ± 0.6 |
Longitude of periastron (ω) | 304.2° | ± 1.9 |
Node (Ω) | 270.1° | ± 0.5 |
Notes | n | |
Reference | Tok2015c | |
Equinox | 2000 | |
Last observation | 2014 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
277.6 |
0.167 |
2001 |
278.0 |
0.162 |
2002 |
278.4 |
0.156 |
2003 |
278.8 |
0.151 |
2004 |
279.3 |
0.145 |
2005 |
279.9 |
0.139 |
2006 |
280.5 |
0.133 |
2007 |
281.1 |
0.127 |
2008 |
281.8 |
0.122 |
2009 |
282.6 |
0.116 |
2010 |
283.4 |
0.110 |
2011 |
284.4 |
0.104 |
2012 |
285.4 |
0.098 |
2013 |
286.6 |
0.092 |
2014 |
288.0 |
0.087 |
2015 |
289.5 |
0.081 |
2016 |
291.3 |
0.075 |
2017 |
293.4 |
0.069 |
2018 |
295.8 |
0.064 |
2019 |
298.7 |
0.058 |
2020 |
302.2 |
0.053 |
2021 |
306.5 |
0.048 |
2022 |
311.7 |
0.043 |
2023 |
318.2 |
0.039 |
2024 |
326.1 |
0.035 |
2025 |
335.7 |
0.032 |
2026 |
346.7 |
0.030 |
2027 |
358.7 |
0.030 |
2028 |
10.6 |
0.031 |
2029 |
21.5 |
0.033 |
2030 |
30.9 |
0.036 |
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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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