17221+2310 COU 415 (HD 157392)
17h 22m 04.55s +23° 09' 40.4" P.A. 236.00 sep 0.2 mag 8.75,9.83 Sp F5 dist. 84.75 pc (276.45 l.y.)
Coord 2000 |
17221+2310 |
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Discov num |
COU 415 |
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Comp |
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Coord arcsec 2000 |
17 22 04.55 +23 09 40.4 |
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Date first |
1969 |
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Date last |
2013 |
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Obs |
58 |
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Pa first |
124 |
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Pa last |
236.1 |
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P.A. Now (θ) |
207.1° |
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Sep first |
0.3 |
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Sep last |
0.232 |
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Sep. Now (ρ) |
0.287" |
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Mag pri |
8.75 |
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Mag sec |
9.83 |
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delta mag (ΔM) |
1.08 |
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Spectral class |
F5 (yellow-white) |
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Pri motion ra |
-013 |
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Sec motion ra |
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Pri motion dec |
+066 |
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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 157392 |
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Constellation |
Hercules |
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SAO |
85038 |
|
HIP |
84976 |
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Tycho2 |
2074-01335-1 |
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Gaia DR2 |
4569257307824602112 |
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HD |
157392 |
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BD |
BD+23 3092 |
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Distance |
84.75 |
|
Distance ly |
276.45 |
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ORBITAL ELEMENTS
Period (P) | 94.449y | |
Periastron (T) | 1989.72y | |
Semi-major axis (a) | 0.308a | |
Eccentricity (e) | 0.383 | |
Inclination (i) | 135.2° | |
Longitude of periastron (ω) | 125.5° | |
Node (Ω) | 129.3° | |
Notes | n | |
Reference | Msn2011c | |
Equinox | 2000 | |
Last observation | 2009 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
291.3 |
0.234 |
2001 |
287.1 |
0.237 |
2002 |
282.9 |
0.240 |
2003 |
278.8 |
0.241 |
2004 |
274.8 |
0.243 |
2005 |
270.8 |
0.244 |
2006 |
266.8 |
0.245 |
2007 |
262.9 |
0.246 |
2008 |
259.0 |
0.247 |
2009 |
255.1 |
0.248 |
2010 |
251.3 |
0.250 |
2011 |
247.5 |
0.251 |
2012 |
243.8 |
0.253 |
2013 |
240.1 |
0.254 |
2014 |
236.5 |
0.257 |
2015 |
232.9 |
0.259 |
2016 |
229.4 |
0.262 |
2017 |
226.0 |
0.264 |
2018 |
222.6 |
0.268 |
2019 |
219.4 |
0.271 |
2020 |
216.2 |
0.275 |
2021 |
213.1 |
0.278 |
2022 |
210.1 |
0.282 |
2023 |
207.1 |
0.287 |
2024 |
204.3 |
0.291 |
2025 |
201.5 |
0.295 |
2026 |
198.9 |
0.300 |
2027 |
196.3 |
0.304 |
2028 |
193.7 |
0.309 |
2029 |
191.3 |
0.314 |
2030 |
188.9 |
0.318 |
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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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