17386+5546 STF 2199 (HD 160780)
17h 38m 38.32s +55° 45' 34.9" P.A. 53.00 sep 2.0 mag 8.03,8.60 Sp F8V dist. 121.21 pc (395.39 l.y.)
Coord 2000 |
17386+5546 |
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Discov num |
STF2199 |
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Comp |
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Coord arcsec 2000 |
17 38 38.32 +55 45 34.9 |
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Date first |
1830 |
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Date last |
2020 |
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Obs |
248 |
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Pa first |
116 |
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Pa last |
53.4 |
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P.A. Now (θ) |
53.4° |
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Sep first |
1.7 |
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Sep last |
2.04 |
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Sep. Now (ρ) |
2.04" |
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Mag pri |
8.03 |
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Mag sec |
8.60 |
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delta mag (ΔM) |
0.57 |
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Spectral class |
F8V (yellow-white) |
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Pri motion ra |
+004 |
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Sec motion ra |
+004 |
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Pri motion dec |
-012 |
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Sec motion dec |
-012 |
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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 160780 |
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Constellation |
Draco |
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SAO |
30494 |
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HIP |
86344 |
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Tycho2 |
3893-00469-1 |
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Gaia DR2 |
1421106752993180672 |
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HD |
160780 |
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GC |
23956 |
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ADS |
10699 |
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BD |
BD+55 1961 |
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Distance |
121.21 |
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Distance ly |
395.39 |
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ORBITAL ELEMENTS
Period (P) | 1126.0007y | ± 529.269 |
Periastron (T) | 1742.0237y | ± 56.4431 |
Semi-major axis (a) | 2.89677a | ± 0.99016 |
Eccentricity (e) | 0.71716 | ± 0.22261 |
Inclination (i) | 120.38° | ± 15.261 |
Longitude of periastron (ω) | 297.078° | ± 22.188 |
Node (Ω) | 148.322° | ± 29.574 |
Notes | n | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 4 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
58.4 |
1.967 |
2001 |
58.2 |
1.971 |
2002 |
57.9 |
1.975 |
2003 |
57.7 |
1.979 |
2004 |
57.4 |
1.983 |
2005 |
57.2 |
1.987 |
2006 |
56.9 |
1.991 |
2007 |
56.7 |
1.994 |
2008 |
56.5 |
1.998 |
2009 |
56.2 |
2.002 |
2010 |
56.0 |
2.006 |
2011 |
55.8 |
2.010 |
2012 |
55.5 |
2.014 |
2013 |
55.3 |
2.018 |
2014 |
55.1 |
2.022 |
2015 |
54.8 |
2.026 |
2016 |
54.6 |
2.030 |
2017 |
54.4 |
2.034 |
2018 |
54.1 |
2.038 |
2019 |
53.9 |
2.042 |
2020 |
53.7 |
2.046 |
2021 |
53.5 |
2.050 |
2022 |
53.2 |
2.054 |
2023 |
53.0 |
2.058 |
2024 |
52.8 |
2.062 |
2025 |
52.6 |
2.066 |
2026 |
52.4 |
2.070 |
2027 |
52.1 |
2.074 |
2028 |
51.9 |
2.078 |
2029 |
51.7 |
2.082 |
2030 |
51.5 |
2.086 |
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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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