16534-2025 WSI 86 (HD 152311)
16h 53m 25.26s -20° 24' 55.8" P.A. 180.00 sep 0.4 mag 5.90,11.30 Sp G2IV-V dist. 26.94 pc (87.88 l.y.)
| Coord 2000 |
16534-2025 |
|
Discov num |
WSI 86 |
|
Comp |
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Coord arcsec 2000 |
16 53 25.26 -20 24 55.8 |
|
| Date first |
2008 |
|
Date last |
2021 |
|
Obs |
7 |
|
| Pa first |
167 |
|
Pa last |
180 |
|
P.A. Now (θ) |
180° |
|
| Sep first |
0.4 |
|
Sep last |
0.382 |
|
Sep. Now (ρ) |
0.382" |
|
| Mag pri |
5.90 |
|
Mag sec |
11.30 |
|
delta mag (ΔM) |
5.4 |
|
Spectral class |
G2IV-V (yellow) |
|
| Pri motion ra |
-058 |
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Sec motion ra |
|
|
| Pri motion dec |
-027 |
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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.
OTHER CATALOGS AND DESIGNATIONS
| Name |
HD 152311 |
|
Constellation |
Ophiuchus |
|
SAO |
184754 |
|
HIP |
82621 |
|
| Tycho2 |
6226-01945-1 |
|
Gaia DR2 |
4127420626087054976 |
|
HD |
152311 |
|
HR |
6269 |
|
| GC |
22731 |
|
BD |
BD-20 4572 |
|
Distance |
26.94 |
|
Distance ly |
87.88 |
|
ORBITAL ELEMENTS
| Period (P) | 14.91y | ± 0.25 |
Periastron (T) | 2014.96y | ± 0.17 |
Semi-major axis (a) | 0.2697a | ± 0.0059 |
| Eccentricity (e) | 0.502 | ± 0.013 |
Inclination (i) | 132° | ± 2.3 |
Longitude of periastron (ω) | 26.7° | ± 5.9 |
| Node (Ω) | 13.1° | ± 3 |
Notes | n | |
Reference | Tok2020e | |
| Equinox | | |
Last observation | | |
Grade | 4 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
357.6 |
0.129 |
| 2001 |
276.4 |
0.114 |
| 2002 |
229.0 |
0.196 |
| 2003 |
210.6 |
0.277 |
| 2004 |
199.8 |
0.335 |
| 2005 |
191.7 |
0.371 |
| 2006 |
184.7 |
0.388 |
| 2007 |
178.0 |
0.388 |
| 2008 |
171.0 |
0.372 |
| 2009 |
163.1 |
0.344 |
| 2010 |
153.4 |
0.303 |
| 2011 |
140.2 |
0.253 |
| 2012 |
120.1 |
0.201 |
| 2013 |
87.8 |
0.160 |
| 2014 |
43.8 |
0.148 |
| 2015 |
351.9 |
0.125 |
| 2016 |
269.7 |
0.119 |
| 2017 |
226.7 |
0.204 |
| 2018 |
209.4 |
0.283 |
| 2019 |
199.0 |
0.339 |
| 2020 |
191.0 |
0.373 |
| 2021 |
184.1 |
0.389 |
| 2022 |
177.4 |
0.387 |
| 2023 |
170.3 |
0.370 |
| 2024 |
162.3 |
0.340 |
| 2025 |
152.4 |
0.299 |
| 2026 |
138.7 |
0.248 |
| 2027 |
117.8 |
0.196 |
| 2028 |
84.2 |
0.158 |
| 2029 |
39.6 |
0.148 |
| 2030 |
345.8 |
0.120 |
|
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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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