17155+1052 HDS 2440 (HD 156146)
17h 15m 28.89s +10° 51' 36.0" P.A. 82.00 sep 0.2 mag 9.24,10.04 Sp G5 dist. 71.48 pc (233.17 l.y.)
Coord 2000 |
17155+1052 |
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Discov num |
HDS2440 |
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Comp |
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Coord arcsec 2000 |
17 15 28.89 +10 51 36.0 |
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Date first |
1991 |
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Date last |
2021 |
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Obs |
15 |
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Pa first |
293 |
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Pa last |
82.1 |
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P.A. Now (θ) |
71.4° |
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Sep first |
0.1 |
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Sep last |
0.159 |
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Sep. Now (ρ) |
0.151" |
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Mag pri |
9.24 |
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Mag sec |
10.04 |
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delta mag (ΔM) |
0.8 |
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Spectral class |
G5 (yellow) |
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Pri motion ra |
-065 |
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Sec motion ra |
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Pri motion dec |
-225 |
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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 156146 |
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Constellation |
Ophiuchus |
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SAO |
102690 |
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HIP |
84417 |
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Tycho2 |
0982-02190-1 |
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Gaia DR2 |
4539864892406879872 |
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HD |
156146 |
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GC |
23297 |
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BD |
BD+11 3146 |
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Distance |
71.48 |
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Distance ly |
233.17 |
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ORBITAL ELEMENTS
Period (P) | 25.73y | ± 0.26 |
Periastron (T) | 2002.46y | ± 0.12 |
Semi-major axis (a) | 153.7m | ± 1.3 |
Eccentricity (e) | 0.252 | ± 0.012 |
Inclination (i) | 120.5° | ± 1 |
Longitude of periastron (ω) | 109.3° | ± 1.5 |
Node (Ω) | 75.25° | ± 0.6 |
Notes | | |
Reference | Mdz2021 | |
Equinox | | |
Last observation | | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
40.8 |
0.091 |
2001 |
13.4 |
0.066 |
2002 |
329.4 |
0.060 |
2003 |
294.0 |
0.079 |
2004 |
274.4 |
0.104 |
2005 |
262.1 |
0.124 |
2006 |
252.5 |
0.135 |
2007 |
243.9 |
0.138 |
2008 |
235.2 |
0.134 |
2009 |
225.5 |
0.126 |
2010 |
214.3 |
0.115 |
2011 |
200.8 |
0.105 |
2012 |
184.9 |
0.098 |
2013 |
167.3 |
0.096 |
2014 |
150.1 |
0.100 |
2015 |
135.0 |
0.108 |
2016 |
122.5 |
0.120 |
2017 |
112.3 |
0.133 |
2018 |
103.9 |
0.145 |
2019 |
96.7 |
0.155 |
2020 |
90.3 |
0.162 |
2021 |
84.2 |
0.164 |
2022 |
78.0 |
0.160 |
2023 |
71.4 |
0.151 |
2024 |
63.4 |
0.134 |
2025 |
52.6 |
0.111 |
2026 |
35.1 |
0.084 |
2027 |
2.6 |
0.062 |
2028 |
317.9 |
0.064 |
2029 |
287.6 |
0.086 |
2030 |
270.6 |
0.111 |
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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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