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 |
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Discov num |
WSI 86 |
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Comp |
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Coord arcsec 2000 |
16 53 25.26 -20 24 55.8 |
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Date first |
2008 |
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Date last |
2021 |
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Obs |
7 |
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Pa first |
167 |
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Pa last |
180 |
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P.A. Now (θ) |
180° |
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Sep first |
0.4 |
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Sep last |
0.382 |
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Sep. Now (ρ) |
0.382" |
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Mag pri |
5.90 |
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Mag sec |
11.30 |
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delta mag (ΔM) |
5.4 |
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Spectral class |
G2IV-V (yellow) |
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Pri motion ra |
-058 |
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Sec motion ra |
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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 |
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Constellation |
Ophiuchus |
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SAO |
184754 |
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HIP |
82621 |
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Tycho2 |
6226-01945-1 |
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Gaia DR2 |
4127420626087054976 |
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HD |
152311 |
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HR |
6269 |
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GC |
22731 |
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BD |
BD-20 4572 |
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Distance |
26.94 |
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Distance ly |
87.88 |
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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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