18151-5751 HJ 5029 (HD 166653)
18h 15m 08.66s -57° 51' 15.8" P.A. 79.00 sep 1.8 mag 8.28,8.55 Sp G2V dist. 51.41 pc (167.7 l.y.)
Coord 2000 |
18151-5751 |
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Discov num |
HJ 5029 |
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Comp |
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Coord arcsec 2000 |
18 15 08.66 -57 51 15.8 |
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Date first |
1836 |
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Date last |
2021 |
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Obs |
50 |
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Pa first |
122 |
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Pa last |
78.9 |
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P.A. Now (θ) |
78.9° |
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Sep first |
2.0 |
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Sep last |
1.844 |
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Sep. Now (ρ) |
1.844" |
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Mag pri |
8.28 |
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Mag sec |
8.55 |
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delta mag (ΔM) |
0.27 |
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Spectral class |
G2V (yellow) |
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Pri motion ra |
+073 |
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Sec motion ra |
+073 |
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Pri motion dec |
-106 |
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Sec motion dec |
-106 |
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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 166653 |
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Constellation |
Pavo |
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SAO |
245335 |
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HIP |
89430 |
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Tycho2 |
8752-01504-1 |
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Gaia DR2 |
6647851265236712448 |
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HD |
166653 |
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GC |
24858 |
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CP |
CP-57 8940 |
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Distance |
51.41 |
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Distance ly |
167.7 |
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ORBITAL ELEMENTS
Period (P) | 792.0885y | ± 327.5025 |
Periastron (T) | 1796.8186y | ± 18.8777 |
Semi-major axis (a) | 3.99925a | ± 2.32148 |
Eccentricity (e) | 0.75497 | ± 0.20189 |
Inclination (i) | 103.022° | ± 7.264 |
Longitude of periastron (ω) | 276.603° | ± 15.593 |
Node (Ω) | 126.771° | ± 5.587 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
85.8 |
1.933 |
2001 |
85.5 |
1.928 |
2002 |
85.2 |
1.922 |
2003 |
84.9 |
1.916 |
2004 |
84.6 |
1.911 |
2005 |
84.3 |
1.905 |
2006 |
84.0 |
1.900 |
2007 |
83.7 |
1.895 |
2008 |
83.4 |
1.889 |
2009 |
83.1 |
1.884 |
2010 |
82.8 |
1.878 |
2011 |
82.5 |
1.873 |
2012 |
82.2 |
1.867 |
2013 |
81.9 |
1.862 |
2014 |
81.6 |
1.857 |
2015 |
81.3 |
1.851 |
2016 |
81.0 |
1.846 |
2017 |
80.6 |
1.841 |
2018 |
80.3 |
1.835 |
2019 |
80.0 |
1.830 |
2020 |
79.7 |
1.825 |
2021 |
79.4 |
1.820 |
2022 |
79.0 |
1.815 |
2023 |
78.7 |
1.810 |
2024 |
78.4 |
1.804 |
2025 |
78.1 |
1.799 |
2026 |
77.7 |
1.794 |
2027 |
77.4 |
1.789 |
2028 |
77.0 |
1.784 |
2029 |
76.7 |
1.779 |
2030 |
76.4 |
1.774 |
2031 |
76.0 |
1.769 |
2032 |
75.7 |
1.765 |
2033 |
75.3 |
1.760 |
2034 |
75.0 |
1.755 |
2035 |
74.6 |
1.750 |
2036 |
74.3 |
1.745 |
2037 |
73.9 |
1.741 |
2038 |
73.6 |
1.736 |
2039 |
73.2 |
1.731 |
2040 |
72.9 |
1.727 |
2041 |
72.5 |
1.722 |
2042 |
72.1 |
1.718 |
2043 |
71.8 |
1.713 |
2044 |
71.4 |
1.709 |
2045 |
71.0 |
1.705 |
2046 |
70.7 |
1.700 |
2047 |
70.3 |
1.696 |
2048 |
69.9 |
1.692 |
2049 |
69.5 |
1.688 |
2050 |
69.2 |
1.683 |
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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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