17326+3445 HU 1181 (HD 159304)
17h 32m 34.08s +34° 44' 47.6" P.A. 323.00 sep 0.1 mag 8.62,9.11 Sp G0 dist. 61.96 pc (202.11 l.y.)
Coord 2000 |
17326+3445 |
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Discov num |
HU 1181 |
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Comp |
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Coord arcsec 2000 |
17 32 34.08 +34 44 47.6 |
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Date first |
1904 |
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Date last |
2012 |
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Obs |
45 |
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Pa first |
331 |
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Pa last |
323 |
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P.A. Now (θ) |
152.1° |
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Sep first |
0.2 |
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Sep last |
0.113 |
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Sep. Now (ρ) |
0.182" |
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Mag pri |
8.62 |
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Mag sec |
9.11 |
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delta mag (ΔM) |
0.49 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+037 |
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Sec motion ra |
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Pri motion dec |
+005 |
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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 159304 |
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Constellation |
Hercules |
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SAO |
66127 |
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HIP |
85846 |
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Tycho2 |
2613-00891-1 |
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Gaia DR2 |
1335897698512788224 |
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HD |
159304 |
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GC |
23786 |
|
ADS |
10624 |
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BD |
BD+34 2990 |
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Distance |
61.96 |
|
Distance ly |
202.11 |
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ORBITAL ELEMENTS
Period (P) | 23.3y | |
Periastron (T) | 1992y | |
Semi-major axis (a) | 0.16a | |
Eccentricity (e) | 0.26 | |
Inclination (i) | 70° | |
Longitude of periastron (ω) | 205° | |
Node (Ω) | 157° | |
Notes | n | |
Reference | Sod1999 | |
Equinox | 2000 | |
Last observation | | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
153.3 |
0.186 |
2001 |
156.8 |
0.195 |
2002 |
160.2 |
0.197 |
2003 |
163.7 |
0.192 |
2004 |
167.4 |
0.180 |
2005 |
171.8 |
0.163 |
2006 |
177.5 |
0.142 |
2007 |
185.4 |
0.116 |
2008 |
198.0 |
0.089 |
2009 |
220.6 |
0.066 |
2010 |
257.3 |
0.057 |
2011 |
291.6 |
0.070 |
2012 |
311.9 |
0.093 |
2013 |
324.3 |
0.112 |
2014 |
333.7 |
0.121 |
2015 |
342.9 |
0.114 |
2016 |
355.2 |
0.091 |
2017 |
19.3 |
0.060 |
2018 |
72.6 |
0.047 |
2019 |
115.6 |
0.071 |
2020 |
133.1 |
0.106 |
2021 |
142.0 |
0.138 |
2022 |
147.7 |
0.164 |
2023 |
152.1 |
0.182 |
2024 |
155.8 |
0.193 |
2025 |
159.2 |
0.197 |
2026 |
162.6 |
0.194 |
2027 |
166.3 |
0.184 |
2028 |
170.4 |
0.169 |
2029 |
175.6 |
0.149 |
2030 |
182.6 |
0.124 |
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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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