16430-0857 YSC 155 (HD 150686)
16h 43m 01.31s -08° 57' 04.4" sep 0.0 mag 8.90,10.80 Sp F8 dist. 107.87 pc (351.87 l.y.)
| Coord 2000 |
16430-0857 |
|
Discov num |
YSC 155 |
|
Comp |
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Coord arcsec 2000 |
16 43 01.31 -08 57 04.4 |
|
| Date first |
2008 |
|
Date last |
2021 |
|
Obs |
13 |
|
| Pa first |
306 |
|
Pa last |
359.9 |
|
P.A. Now (θ) |
341.4° |
|
| Sep first |
0.1 |
|
Sep last |
0.012 |
|
Sep. Now (ρ) |
0.077" |
|
| Mag pri |
8.90 |
|
Mag sec |
10.80 |
|
delta mag (ΔM) |
1.9 |
|
Spectral class |
F8 (yellow-white) |
|
| Pri motion ra |
-012 |
|
Sec motion ra |
|
|
| Pri motion dec |
-019 |
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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 150686 |
|
Constellation |
Ophiuchus |
|
SAO |
141326 |
|
HIP |
81843 |
|
| Tycho2 |
5628-00651-1 |
|
Gaia DR2 |
4338705529252972288 |
|
HD |
150686 |
|
GC |
22477 |
|
| BD |
BD-08 4294 |
|
Distance |
107.87 |
|
Distance ly |
351.87 |
|
ORBITAL ELEMENTS
| Period (P) | 10.82y | ± 0.19 |
Periastron (T) | 2020.77y | ± 0.16 |
Semi-major axis (a) | 0.065a | ± 0.006 |
| Eccentricity (e) | 0.9 | |
Inclination (i) | 137° | ± 10.3 |
Longitude of periastron (ω) | 318.4° | ± 10.3 |
| Node (Ω) | 113.1° | ± 6.7 |
Notes | | |
Reference | Tok2021f | |
| Equinox | | |
Last observation | 2021 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
359.6 |
0.041 |
| 2001 |
344.5 |
0.069 |
| 2002 |
337.2 |
0.088 |
| 2003 |
332.2 |
0.101 |
| 2004 |
328.1 |
0.108 |
| 2005 |
324.4 |
0.111 |
| 2006 |
320.7 |
0.108 |
| 2007 |
316.6 |
0.100 |
| 2008 |
311.3 |
0.084 |
| 2009 |
302.2 |
0.057 |
| 2010 |
99.5 |
0.008 |
| 2011 |
355.5 |
0.047 |
| 2012 |
342.9 |
0.073 |
| 2013 |
336.2 |
0.091 |
| 2014 |
331.4 |
0.102 |
| 2015 |
327.4 |
0.109 |
| 2016 |
323.7 |
0.111 |
| 2017 |
320.0 |
0.107 |
| 2018 |
315.7 |
0.097 |
| 2019 |
310.1 |
0.080 |
| 2020 |
299.4 |
0.050 |
| 2021 |
40.2 |
0.016 |
| 2022 |
352.2 |
0.053 |
| 2023 |
341.4 |
0.077 |
| 2024 |
335.2 |
0.093 |
| 2025 |
330.7 |
0.104 |
| 2026 |
326.8 |
0.110 |
| 2027 |
323.1 |
0.110 |
| 2028 |
319.3 |
0.106 |
| 2029 |
314.9 |
0.095 |
| 2030 |
308.8 |
0.076 |
|
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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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