21477-3054 FIN 330 AB
21h 47m 44.17s -30° 53' 53.9" P.A. 347.00 sep 0.1 mag 5.80,5.80 Sp A2V dist. 98.43 pc (321.08 l.y.)
| Coord 2000 |
21477-3054 |
|
Discov num |
FIN 330 |
|
Comp |
AB |
|
Coord arcsec 2000 |
21 47 44.17 -30 53 53.9 |
|
| Date first |
1951 |
|
Date last |
2021 |
|
Obs |
29 |
|
| Pa first |
37 |
|
Pa last |
346.8 |
|
P.A. Now (θ) |
307.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.066 |
|
Sep. Now (ρ) |
0.043" |
|
| Mag pri |
5.80 |
|
Mag sec |
5.80 |
|
delta mag (ΔM) |
0 |
|
Spectral class |
A2V (white) |
|
| Pri motion ra |
-032 |
|
Sec motion ra |
|
|
| Pri motion dec |
+002 |
|
Sec motion dec |
|
|
| Notes |
N
O
(See Notes, Orbital solution) |
|
This double is physical.
21477-3054 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
213292 |
21 47 44 -30 53 54 |
FIN 330 AB |
2021 |
29 |
347 |
0.1 |
5.80 |
5.80 |
0.00 |
Y |
<=== |
| Show |
The PsA |
213292 |
21 47 44 -30 53 54 |
HJ 5296 AB,C |
2020 |
12 |
343 |
32.1 |
5.01 |
11.30 |
6.29 |
|
|
Triple system
4 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Piscis Austrinus |
|
SAO |
213292 |
|
HIP |
107608 |
|
Tycho2 |
7487-01984-1 |
|
| Gaia DR2 |
6592981614920839168 |
|
HD |
207155 |
|
HR |
8326 |
|
GC |
30509 |
|
| CD |
CD-3118466 |
|
CP |
CP-31 6596 |
|
Bayer |
Theta Piscis Austrini |
|
Bayer name |
The PsA |
|
| Flamsteed |
10 Piscis Austrini |
|
Flamsteed name |
10 PsA |
|
FK5 |
3741 |
|
Distance |
98.43 |
|
| Distance ly |
321.08 |
|
Bayer greek |
θ PsA |
|
ORBITAL ELEMENTS
| Period (P) | 20.218y | ± 0.13 |
Periastron (T) | 2007.26y | ± 0.16 |
Semi-major axis (a) | 0.124a | ± 0.0016 |
| Eccentricity (e) | 0.427 | ± 0.026 |
Inclination (i) | 108.4° | ± 0.9 |
Longitude of periastron (ω) | 215.2° | ± 3.1 |
| Node (Ω) | 31.9° | ± 1.2 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
4.5 |
0.098 |
| 2001 |
353.9 |
0.075 |
| 2002 |
334.4 |
0.054 |
| 2003 |
298.0 |
0.042 |
| 2004 |
257.6 |
0.049 |
| 2005 |
233.6 |
0.066 |
| 2006 |
218.7 |
0.077 |
| 2007 |
204.4 |
0.067 |
| 2008 |
170.7 |
0.034 |
| 2009 |
77.1 |
0.038 |
| 2010 |
50.6 |
0.078 |
| 2011 |
41.7 |
0.111 |
| 2012 |
36.6 |
0.136 |
| 2013 |
32.8 |
0.152 |
| 2014 |
29.7 |
0.161 |
| 2015 |
26.7 |
0.164 |
| 2016 |
23.8 |
0.161 |
| 2017 |
20.6 |
0.152 |
| 2018 |
17.0 |
0.139 |
| 2019 |
12.4 |
0.123 |
| 2020 |
6.2 |
0.102 |
| 2021 |
356.7 |
0.080 |
| 2022 |
339.8 |
0.058 |
| 2023 |
307.4 |
0.043 |
| 2024 |
265.1 |
0.046 |
| 2025 |
237.7 |
0.063 |
| 2026 |
221.6 |
0.076 |
| 2027 |
208.0 |
0.071 |
| 2028 |
182.9 |
0.041 |
| 2029 |
91.7 |
0.031 |
| 2030 |
53.7 |
0.069 |
|
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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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