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 |
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Discov num |
HDS2506 |
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Comp |
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Coord arcsec 2000 |
17 43 00.81 +05 47 21.4 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
17 |
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Pa first |
122 |
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Pa last |
80.5 |
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P.A. Now (θ) |
25.2° |
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Sep first |
0.4 |
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Sep last |
0.163 |
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Sep. Now (ρ) |
0.115" |
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Mag pri |
10.92 |
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Mag sec |
12.76 |
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delta mag (ΔM) |
1.84 |
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Spectral class |
M2 (red) |
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Pri motion ra |
+226 |
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Sec motion ra |
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Pri motion dec |
-061 |
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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 |
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HIP |
86707 |
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Tycho2 |
0427-01536-3 |
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Gaia DR2 |
4473756480908157184 |
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GL |
NN 4024 |
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Distance |
19.96 |
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Distance ly |
65.11 |
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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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