22220-3431 B 557 Aa,Ab
22h 21m 57.60s -34° 31' 13.0" P.A. 9.00 sep 0.1 mag 8.31,8.26 Sp F3/5V dist. 86.21 pc (281.22 l.y.)
| Coord 2000 |
22220-3431 |
|
Discov num |
B 557 |
|
Comp |
Aa,Ab |
|
Coord arcsec 2000 |
22 21 57.60 -34 31 13.0 |
|
| Date first |
1926 |
|
Date last |
2021 |
|
Obs |
24 |
|
| Pa first |
344 |
|
Pa last |
9 |
|
P.A. Now (θ) |
3.5° |
|
| Sep first |
0.3 |
|
Sep last |
0.092 |
|
Sep. Now (ρ) |
0.138" |
|
| Mag pri |
8.31 |
|
Mag sec |
8.26 |
|
delta mag (ΔM) |
0.05 |
|
Spectral class |
F3/5V (yellow-white) |
|
| Pri motion ra |
+013 |
|
Sec motion ra |
|
|
| Pri motion dec |
+028 |
|
Sec motion dec |
|
|
| Notes |
N
(See Notes) |
|
Nature of this double is uncertain.
22220-3431 SYSTEM COMPONENTS
| Show |
name |
SAO |
coord |
wds_name |
last |
obs |
pa |
sep |
mag1 |
mag2 |
d_mag |
orb |
current |
| Show |
|
213765 |
22 21 58 -34 31 13 |
B 557 Aa,Ab |
2021 |
24 |
9 |
0.1 |
8.31 |
8.26 |
0.05 |
Y |
<=== |
| Show |
HD 212025 |
213765 |
22 21 58 -34 31 13 |
SHY 805 AB |
2016 |
7 |
37 |
141.9 |
7.47 |
7.47 |
0.00 |
|
|
| Show |
|
213767 |
22 22 05 -34 29 20 |
SHY 802 BC |
2016 |
4 |
297 |
999.9 |
7.47 |
6.41 |
1.06 |
|
|
Quadruple system
3 estimated visually detectable stars in this system
OTHER CATALOGS AND DESIGNATIONS
| Constellation |
Piscis Austrinus |
|
SAO |
213765 |
|
HIP |
110419 |
|
Tycho2 |
7499-01159-1 |
|
| Gaia DR2 |
6599618335825582464 |
|
HD |
212025 |
|
CD |
CD-3515279 |
|
CP |
CP-35 9218 |
|
| Distance |
86.21 |
|
Distance ly |
281.22 |
|
ORBITAL ELEMENTS
| Period (P) | 107.97y | ± 4.79 |
Periastron (T) | 2020.02y | ± 0.13 |
Semi-major axis (a) | 0.3559a | ± 0.029 |
| Eccentricity (e) | 0.893 | ± 0.019 |
Inclination (i) | 112.6° | ± 2.4 |
Longitude of periastron (ω) | 72.8° | ± 1.7 |
| Node (Ω) | 190° | ± 1.9 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | 2019 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
278.8 |
0.186 |
| 2001 |
276.6 |
0.181 |
| 2002 |
274.3 |
0.176 |
| 2003 |
271.9 |
0.172 |
| 2004 |
269.3 |
0.167 |
| 2005 |
266.7 |
0.163 |
| 2006 |
263.8 |
0.158 |
| 2007 |
260.8 |
0.153 |
| 2008 |
257.6 |
0.149 |
| 2009 |
254.2 |
0.144 |
| 2010 |
250.6 |
0.140 |
| 2011 |
246.7 |
0.135 |
| 2012 |
242.6 |
0.131 |
| 2013 |
238.2 |
0.126 |
| 2014 |
233.4 |
0.121 |
| 2015 |
228.1 |
0.115 |
| 2016 |
222.3 |
0.109 |
| 2017 |
215.6 |
0.100 |
| 2018 |
207.4 |
0.088 |
| 2019 |
195.3 |
0.067 |
| 2020 |
143.2 |
0.019 |
| 2021 |
19.1 |
0.062 |
| 2022 |
8.4 |
0.106 |
| 2023 |
3.5 |
0.138 |
| 2024 |
0.3 |
0.162 |
| 2025 |
357.8 |
0.183 |
| 2026 |
355.8 |
0.200 |
| 2027 |
354.1 |
0.215 |
| 2028 |
352.6 |
0.228 |
| 2029 |
351.3 |
0.240 |
| 2030 |
350.1 |
0.251 |
|
|
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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