16302-1440 WSI 132
16h 30m 13.10s -14° 39' 49.6" P.A. 307.00 sep 0.1 mag 13.60,15.60 dist. 22.43 pc (73.17 l.y.)
| Coord 2000 |
16302-1440 |
|
Discov num |
WSI 132 |
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Comp |
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Coord arcsec 2000 |
16 30 13.10 -14 39 49.6 |
|
| Date first |
2008 |
|
Date last |
2021 |
|
Obs |
9 |
|
| Pa first |
218 |
|
Pa last |
307.4 |
|
P.A. Now (θ) |
307.4° |
|
| Sep first |
0.4 |
|
Sep last |
0.084 |
|
Sep. Now (ρ) |
0.084" |
|
| Mag pri |
13.60 |
|
Mag sec |
15.60 |
|
delta mag (ΔM) |
2 |
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Spectral class |
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| Pri motion ra |
-495 |
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Sec motion ra |
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| Pri motion dec |
-205 |
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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
| Constellation |
Ophiuchus |
|
HIP |
80817 |
|
GL |
GJ 2121 |
|
Distance |
22.43 |
|
| Distance ly |
73.17 |
|
ORBITAL ELEMENTS
| Period (P) | 17.8y | ± 0.3 |
Periastron (T) | 2020.969y | ± 0.014 |
Semi-major axis (a) | 0.265a | ± 0.002 |
| Eccentricity (e) | 0.687 | ± 0.004 |
Inclination (i) | 138.9° | ± 1.4 |
Longitude of periastron (ω) | 372.9° | ± 2.4 |
| Node (Ω) | 36.9° | ± 1.5 |
Notes | | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2021 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
173.9 |
0.262 |
| 2001 |
158.8 |
0.195 |
| 2002 |
126.4 |
0.124 |
| 2003 |
45.9 |
0.085 |
| 2004 |
294.2 |
0.103 |
| 2005 |
254.5 |
0.192 |
| 2006 |
239.8 |
0.270 |
| 2007 |
231.1 |
0.330 |
| 2008 |
224.9 |
0.376 |
| 2009 |
219.9 |
0.408 |
| 2010 |
215.4 |
0.430 |
| 2011 |
211.4 |
0.441 |
| 2012 |
207.4 |
0.442 |
| 2013 |
203.4 |
0.435 |
| 2014 |
199.1 |
0.417 |
| 2015 |
194.3 |
0.391 |
| 2016 |
188.7 |
0.354 |
| 2017 |
181.6 |
0.307 |
| 2018 |
171.5 |
0.249 |
| 2019 |
154.4 |
0.181 |
| 2020 |
115.1 |
0.112 |
| 2021 |
23.5 |
0.081 |
| 2022 |
281.5 |
0.120 |
| 2023 |
250.7 |
0.209 |
| 2024 |
237.7 |
0.283 |
| 2025 |
229.8 |
0.340 |
| 2026 |
223.8 |
0.383 |
| 2027 |
218.9 |
0.413 |
| 2028 |
214.6 |
0.433 |
| 2029 |
210.6 |
0.442 |
| 2030 |
206.6 |
0.442 |
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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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