17562+3926 BU 417 (HD 163789)
17h 56m 12.06s +39° 26' 20.8" P.A. 317.00 sep 1.0 mag 8.28,10.08 Sp G0 dist. 93.55 pc (305.16 l.y.)
Coord 2000 |
17562+3926 |
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Discov num |
BU 417 |
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Comp |
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Coord arcsec 2000 |
17 56 12.06 +39 26 20.8 |
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Date first |
1877 |
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Date last |
2016 |
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Obs |
36 |
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Pa first |
270 |
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Pa last |
316.5 |
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P.A. Now (θ) |
316.5° |
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Sep first |
1.6 |
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Sep last |
0.99 |
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Sep. Now (ρ) |
0.99" |
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Mag pri |
8.28 |
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Mag sec |
10.08 |
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delta mag (ΔM) |
1.8 |
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Spectral class |
G0 (yellow) |
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Pri motion ra |
+086 |
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Sec motion ra |
+086 |
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Pri motion dec |
-047 |
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Sec motion dec |
-047 |
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Notes |
O
(Orbital solution) |
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This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 163789 |
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Constellation |
Hercules |
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SAO |
66487 |
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HIP |
87802 |
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Tycho2 |
3093-01857-1 |
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Gaia DR2 |
4611031534137064832 |
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HD |
163789 |
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ADS |
10911 |
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BD |
BD+39 3274 |
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Distance |
93.55 |
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Distance ly |
305.16 |
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ORBITAL ELEMENTS
Period (P) | 938.7625y | ± 483.7501 |
Periastron (T) | 2043.974y | ± 13.6771 |
Semi-major axis (a) | 2.59639a | ± 1.2814 |
Eccentricity (e) | 0.85587 | ± 0.12011 |
Inclination (i) | 63.553° | ± 12.49 |
Longitude of periastron (ω) | 258.543° | ± 9.447 |
Node (Ω) | 155.636° | ± 16.497 |
Notes | | |
Reference | Izm2019 | |
Equinox | | |
Last observation | 2015 | |
Grade | 5 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
308.6 |
1.068 |
2001 |
309.2 |
1.060 |
2002 |
309.7 |
1.051 |
2003 |
310.2 |
1.042 |
2004 |
310.8 |
1.034 |
2005 |
311.4 |
1.024 |
2006 |
311.9 |
1.015 |
2007 |
312.5 |
1.005 |
2008 |
313.1 |
0.995 |
2009 |
313.7 |
0.985 |
2010 |
314.3 |
0.975 |
2011 |
315.0 |
0.964 |
2012 |
315.6 |
0.953 |
2013 |
316.3 |
0.941 |
2014 |
317.0 |
0.929 |
2015 |
317.7 |
0.917 |
2016 |
318.4 |
0.904 |
2017 |
319.1 |
0.891 |
2018 |
319.9 |
0.877 |
2019 |
320.7 |
0.863 |
2020 |
321.5 |
0.848 |
2021 |
322.3 |
0.833 |
2022 |
323.2 |
0.817 |
2023 |
324.1 |
0.800 |
2024 |
325.1 |
0.783 |
2025 |
326.1 |
0.764 |
2026 |
327.1 |
0.745 |
2027 |
328.2 |
0.725 |
2028 |
329.4 |
0.704 |
2029 |
330.6 |
0.681 |
2030 |
331.9 |
0.657 |
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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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