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 Discov num STF2438 Comp Coord arcsec 2000 18 57 28.47 +58 13 30.0
Date first 1782 Date last 2019 Obs 188
Pa first 355 Pa last 355.8 P.A. Now (θ) 356.5°
Sep first 1.0 Sep last 0.846 Sep. Now (ρ) 0.857"
Mag pri 7.01 Mag sec 7.44 delta mag (ΔM) 0.43 Spectral class A2V (white)
Pri motion ra +017 Sec motion ra +039
Pri motion dec +045 Sec motion dec +002
Notes N O (See Notes, Orbital solution)
rPM=1.004
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 176560 Constellation Draco SAO 31292 HIP 93068
Tycho2 3931-01171-1 Gaia DR2 2153756602354646656 HD 176560 HR 7184
GC 26069 ADS 11897 BD BD+58 1849 Distance 125.16
Distance ly 408.27
 
 
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° Notesn ReferenceJte2018
Equinox2000 Last observation2017 Grade3(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


 
grafico orbita
Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.



 
 


wds18575%2B5814b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic