17430+0547 HDS 2506
17h 43m 00.81s +05° 47' 21.4" P.A. 81.00 sep 0.2 mag 10.92,12.76 Sp M2 dist. 19.96 pc (65.11 l.y.)
| Coord 2000 |
17430+0547 |
|
Discov num |
HDS2506 |
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Comp |
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Coord arcsec 2000 |
17 43 00.81 +05 47 21.4 |
|
| Date first |
1991 |
|
Date last |
2021 |
|
Obs |
17 |
|
| Pa first |
122 |
|
Pa last |
80.5 |
|
P.A. Now (θ) |
25.2° |
|
| Sep first |
0.4 |
|
Sep last |
0.163 |
|
Sep. Now (ρ) |
0.115" |
|
| Mag pri |
10.92 |
|
Mag sec |
12.76 |
|
delta mag (ΔM) |
1.84 |
|
Spectral class |
M2 (red) |
|
| Pri motion ra |
+226 |
|
Sec motion ra |
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| Pri motion dec |
-061 |
|
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 |
86707 |
|
Tycho2 |
0427-01536-3 |
|
Gaia DR2 |
4473756480908157184 |
|
| GL |
NN 4024 |
|
Distance |
19.96 |
|
Distance ly |
65.11 |
|
ORBITAL ELEMENTS
| Period (P) | 20.42y | ± 0.3 |
Periastron (T) | 61701d (2027.807y) | ± 101 |
Semi-major axis (a) | 364.8m | ± 3.9 |
| Eccentricity (e) | 0.539 | ± 0.012 |
Inclination (i) | 104.61° | ± 0.21 |
Longitude of periastron (ω) | 233.9° | ± 1.1 |
| Node (Ω) | 129.31° | ± 0.25 |
Notes | | |
Reference | MnA2019 | |
| Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
| label |
theta |
rho |
| 2000 |
91.0 |
0.205 |
| 2001 |
75.1 |
0.154 |
| 2002 |
46.9 |
0.119 |
| 2003 |
10.0 |
0.121 |
| 2004 |
342.9 |
0.156 |
| 2005 |
326.9 |
0.197 |
| 2006 |
315.5 |
0.214 |
| 2007 |
301.8 |
0.156 |
| 2008 |
202.8 |
0.048 |
| 2009 |
141.8 |
0.190 |
| 2010 |
133.5 |
0.306 |
| 2011 |
129.3 |
0.380 |
| 2012 |
126.2 |
0.424 |
| 2013 |
123.6 |
0.444 |
| 2014 |
121.1 |
0.447 |
| 2015 |
118.5 |
0.434 |
| 2016 |
115.7 |
0.410 |
| 2017 |
112.5 |
0.375 |
| 2018 |
108.5 |
0.332 |
| 2019 |
103.2 |
0.282 |
| 2020 |
95.5 |
0.228 |
| 2021 |
82.9 |
0.174 |
| 2022 |
60.5 |
0.130 |
| 2023 |
25.2 |
0.115 |
| 2024 |
352.6 |
0.139 |
| 2025 |
332.7 |
0.181 |
| 2026 |
320.0 |
0.212 |
| 2027 |
308.6 |
0.193 |
| 2028 |
278.2 |
0.077 |
| 2029 |
150.3 |
0.128 |
| 2030 |
136.1 |
0.263 |
|
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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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