18575+5814 STF 2438 (HD 176560)
18h 57m 28.47s +58° 13' 30.0" P.A. 356.00 sep 0.8 mag 7.01,7.44 Sp A2V dist. 125.16 pc (408.27 l.y.)
Coord 2000 |
18575+5814 |
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Discov num |
STF2438 |
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Comp |
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Coord arcsec 2000 |
18 57 28.47 +58 13 30.0 |
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Date first |
1782 |
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Date last |
2019 |
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Obs |
188 |
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Pa first |
355 |
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Pa last |
355.8 |
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P.A. Now (θ) |
356.5° |
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Sep first |
1.0 |
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Sep last |
0.846 |
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Sep. Now (ρ) |
0.857" |
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Mag pri |
7.01 |
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Mag sec |
7.44 |
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delta mag (ΔM) |
0.43 |
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Spectral class |
A2V (white) |
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Pri motion ra |
+017 |
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Sec motion ra |
+039 |
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Pri motion dec |
+045 |
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Sec motion dec |
+002 |
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Notes |
N
O
(See Notes, Orbital solution) |
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rPM=1.004
This double is physical.
OTHER CATALOGS AND DESIGNATIONS
Name |
HD 176560 |
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Constellation |
Draco |
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SAO |
31292 |
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HIP |
93068 |
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Tycho2 |
3931-01171-1 |
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Gaia DR2 |
2153756602354646656 |
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HD |
176560 |
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HR |
7184 |
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GC |
26069 |
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ADS |
11897 |
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BD |
BD+58 1849 |
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Distance |
125.16 |
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Distance ly |
408.27 |
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ORBITAL ELEMENTS
Period (P) | 261.6y | |
Periastron (T) | 1885.89y | |
Semi-major axis (a) | 1.051a | |
Eccentricity (e) | 0.98 | |
Inclination (i) | 114.1° | |
Longitude of periastron (ω) | 86° | |
Node (Ω) | 257.8° | |
Notes | n | |
Reference | Jte2018 | |
Equinox | 2000 | |
Last observation | 2017 | |
Grade | 3 | (1=Definitive, 9=Indet.) |
label |
theta |
rho |
2000 |
0.3 |
0.858 |
2001 |
0.1 |
0.859 |
2002 |
360.0 |
0.859 |
2003 |
359.8 |
0.860 |
2004 |
359.6 |
0.860 |
2005 |
359.5 |
0.860 |
2006 |
359.3 |
0.861 |
2007 |
359.1 |
0.861 |
2008 |
359.0 |
0.861 |
2009 |
358.8 |
0.861 |
2010 |
358.6 |
0.861 |
2011 |
358.5 |
0.861 |
2012 |
358.3 |
0.861 |
2013 |
358.1 |
0.861 |
2014 |
358.0 |
0.861 |
2015 |
357.8 |
0.861 |
2016 |
357.6 |
0.860 |
2017 |
357.5 |
0.860 |
2018 |
357.3 |
0.859 |
2019 |
357.1 |
0.859 |
2020 |
357.0 |
0.859 |
2021 |
356.8 |
0.858 |
2022 |
356.6 |
0.857 |
2023 |
356.5 |
0.857 |
2024 |
356.3 |
0.856 |
2025 |
356.1 |
0.855 |
2026 |
356.0 |
0.854 |
2027 |
355.8 |
0.853 |
2028 |
355.6 |
0.852 |
2029 |
355.4 |
0.851 |
2030 |
355.3 |
0.850 |
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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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