17240+3835 HU 1179 (HD 157853)
17h 24m 02.26s +38° 34' 57.7" P.A. 272.00 sep 0.3 mag 7.13,7.79 Sp F9III dist. 175.44 pc (572.29 l.y.)
Coord 2000 |
17240+3835 |
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Discov num |
HU 1179 |
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Comp |
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Coord arcsec 2000 |
17 24 02.26 +38 34 57.7 |
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Date first |
1905 |
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Date last |
2016 |
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Obs |
93 |
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Pa first |
273 |
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Pa last |
271.7 |
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P.A. Now (θ) |
267.1° |
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Sep first |
0.2 |
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Sep last |
0.293 |
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Sep. Now (ρ) |
0.255" |
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Mag pri |
7.13 |
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Mag sec |
7.79 |
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delta mag (ΔM) |
0.66 |
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Spectral class |
F9III (yellow-white) |
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Pri motion ra |
-007 |
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Sec motion ra |
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Pri motion dec |
+034 |
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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 157853 |
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Constellation |
Hercules |
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SAO |
66006 |
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HIP |
85149 |
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Tycho2 |
3086-02092-1 |
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HD |
157853 |
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HR |
6488 |
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GC |
23560 |
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ADS |
10531 |
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BD |
BD+38 2928 |
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Distance |
175.44 |
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Distance ly |
572.29 |
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ORBITAL ELEMENTS
Period (P) | 91.7y | |
Periastron (T) | 1980.41y | |
Semi-major axis (a) | 0.181a | |
Eccentricity (e) | 0.692 | |
Inclination (i) | 104.4° | |
Longitude of periastron (ω) | 37.9° | |
Node (Ω) | 96.9° | |
Notes | n | |
Reference | Hrt2000b | |
Equinox | | |
Last observation | 1997 | |
Grade | 2 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
275.3 |
0.229 |
2001 |
274.8 |
0.234 |
2002 |
274.4 |
0.239 |
2003 |
274.0 |
0.243 |
2004 |
273.6 |
0.247 |
2005 |
273.3 |
0.250 |
2006 |
272.9 |
0.253 |
2007 |
272.5 |
0.256 |
2008 |
272.2 |
0.258 |
2009 |
271.9 |
0.260 |
2010 |
271.5 |
0.262 |
2011 |
271.2 |
0.263 |
2012 |
270.8 |
0.264 |
2013 |
270.5 |
0.264 |
2014 |
270.2 |
0.264 |
2015 |
269.9 |
0.264 |
2016 |
269.5 |
0.264 |
2017 |
269.2 |
0.264 |
2018 |
268.9 |
0.263 |
2019 |
268.5 |
0.262 |
2020 |
268.2 |
0.260 |
2021 |
267.8 |
0.259 |
2022 |
267.5 |
0.257 |
2023 |
267.1 |
0.255 |
2024 |
266.8 |
0.252 |
2025 |
266.4 |
0.250 |
2026 |
266.0 |
0.247 |
2027 |
265.7 |
0.244 |
2028 |
265.3 |
0.241 |
2029 |
264.9 |
0.237 |
2030 |
264.4 |
0.233 |
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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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