22228-2937 HDS 3172 (HD 212146)
22h 22m 47.28s -29° 37' 10.0" P.A. 344.00 sep 0.1 mag 8.46,10.69 Sp G6V dist. 39.2 pc (127.87 l.y.)
| Coord 2000 |
22228-2937 |
|
Discov num |
HDS3172 |
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Comp |
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Coord arcsec 2000 |
22 22 47.28 -29 37 10.0 |
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| Date first |
1991 |
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Date last |
2021 |
|
Obs |
23 |
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| Pa first |
345 |
|
Pa last |
344.4 |
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P.A. Now (θ) |
339.1° |
|
| Sep first |
0.2 |
|
Sep last |
0.109 |
|
Sep. Now (ρ) |
0.166" |
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| Mag pri |
8.46 |
|
Mag sec |
10.69 |
|
delta mag (ΔM) |
2.23 |
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Spectral class |
G6V (yellow) |
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| Pri motion ra |
+441 |
|
Sec motion ra |
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| Pri motion dec |
-116 |
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Sec motion dec |
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| Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 212146 |
|
Constellation |
Piscis Austrinus |
|
SAO |
191095 |
|
HIP |
110483 |
|
| Tycho2 |
6968-00370-1 |
|
HD |
212146 |
|
CD |
CD-3019122 |
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CP |
CP-30 6628 |
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| Distance |
39.2 |
|
Distance ly |
127.87 |
|
ORBITAL ELEMENTS
| Period (P) | 10.51y | ± 0.25 |
Periastron (T) | 2017.374y | ± 0.069 |
Semi-major axis (a) | 0.1444a | ± 0.0031 |
| Eccentricity (e) | 0.288 | ± 0.023 |
Inclination (i) | 97.4° | ± 0.5 |
Longitude of periastron (ω) | 325.7° | ± 3.1 |
| Node (Ω) | 155.4° | ± 0.4 |
Notes | | |
Reference | Tok2017b | |
| Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
352.7 |
0.070 |
| 2001 |
343.1 |
0.128 |
| 2002 |
339.1 |
0.166 |
| 2003 |
336.2 |
0.176 |
| 2004 |
333.0 |
0.153 |
| 2005 |
327.1 |
0.092 |
| 2006 |
221.8 |
0.016 |
| 2007 |
158.9 |
0.093 |
| 2008 |
150.8 |
0.101 |
| 2009 |
133.6 |
0.048 |
| 2010 |
10.3 |
0.037 |
| 2011 |
346.6 |
0.100 |
| 2012 |
340.9 |
0.150 |
| 2013 |
337.6 |
0.175 |
| 2014 |
334.7 |
0.170 |
| 2015 |
330.8 |
0.128 |
| 2016 |
317.5 |
0.048 |
| 2017 |
167.1 |
0.056 |
| 2018 |
154.8 |
0.108 |
| 2019 |
145.5 |
0.079 |
| 2020 |
87.4 |
0.022 |
| 2021 |
353.0 |
0.069 |
| 2022 |
343.2 |
0.127 |
| 2023 |
339.1 |
0.166 |
| 2024 |
336.2 |
0.177 |
| 2025 |
333.1 |
0.154 |
| 2026 |
327.3 |
0.093 |
| 2027 |
229.2 |
0.015 |
| 2028 |
159.1 |
0.092 |
| 2029 |
151.0 |
0.102 |
| 2030 |
134.4 |
0.049 |
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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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