17394-1546 HU 181 (HD 160239)
17h 39m 24.26s -15° 45' 41.4" P.A. 42.00 sep 1.0 mag 9.70,10.06 Sp G6/8V dist. 186.92 pc (609.73 l.y.)
Coord 2000 |
17394-1546 |
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Discov num |
HU 181 |
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Comp |
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Coord arcsec 2000 |
17 39 24.26 -15 45 41.4 |
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Date first |
1900 |
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Date last |
2016 |
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Obs |
30 |
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Pa first |
95 |
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Pa last |
41.6 |
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P.A. Now (θ) |
41.6° |
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Sep first |
0.2 |
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Sep last |
1.007 |
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Sep. Now (ρ) |
1.007" |
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Mag pri |
9.70 |
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Mag sec |
10.06 |
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delta mag (ΔM) |
0.36 |
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Spectral class |
G6/8V (yellow) |
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Pri motion ra |
-042 |
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Sec motion ra |
-042 |
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Pri motion dec |
-063 |
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Sec motion dec |
-063 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 160239 |
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Constellation |
Serpens |
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SAO |
160722 |
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HIP |
86412 |
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Tycho2 |
6248-00943-1 |
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Gaia DR2 |
4124955830278638208 |
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HD |
160239 |
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ADS |
10683 |
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BD |
BD-15 4635 |
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Distance |
186.92 |
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Distance ly |
609.73 |
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ORBITAL ELEMENTS
Period (P) | 209.66y | |
Periastron (T) | 1912.36y | |
Semi-major axis (a) | 0.644a | |
Eccentricity (e) | 0.676 | |
Inclination (i) | 73.5° | |
Longitude of periastron (ω) | 340.5° | |
Node (Ω) | 229.3° | |
Notes | | |
Reference | Hrt2001a | |
Equinox | 2000 | |
Last observation | 1998 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
40.9 |
0.950 |
2001 |
41.1 |
0.956 |
2002 |
41.3 |
0.962 |
2003 |
41.4 |
0.967 |
2004 |
41.6 |
0.972 |
2005 |
41.7 |
0.977 |
2006 |
41.9 |
0.982 |
2007 |
42.1 |
0.986 |
2008 |
42.2 |
0.991 |
2009 |
42.4 |
0.995 |
2010 |
42.5 |
0.999 |
2011 |
42.7 |
1.003 |
2012 |
42.8 |
1.007 |
2013 |
43.0 |
1.010 |
2014 |
43.1 |
1.013 |
2015 |
43.2 |
1.016 |
2016 |
43.4 |
1.019 |
2017 |
43.5 |
1.022 |
2018 |
43.7 |
1.025 |
2019 |
43.8 |
1.027 |
2020 |
44.0 |
1.029 |
2021 |
44.1 |
1.031 |
2022 |
44.2 |
1.033 |
2023 |
44.4 |
1.034 |
2024 |
44.5 |
1.036 |
2025 |
44.7 |
1.037 |
2026 |
44.8 |
1.038 |
2027 |
44.9 |
1.039 |
2028 |
45.1 |
1.039 |
2029 |
45.2 |
1.040 |
2030 |
45.3 |
1.040 |
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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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