16137+4638 A 1642 (HD 146327)

 
 
16h 13m 43.62s +46° 38' 23.1" P.A. 181.00 sep 0.8 mag 8.87,9.39 Sp G0 dist. 81.77 pc (266.73 l.y.)
 
 
Coord 2000 16137+4638 Discov num A  1642 Comp Coord arcsec 2000 16 13 43.62 +46 38 23.1
Date first 1907 Date last 2016 Obs 58
Pa first 359 Pa last 181 P.A. Now (θ) 181°
Sep first 0.6 Sep last 0.824 Sep. Now (ρ) 0.824"
Mag pri 8.87 Mag sec 9.39 delta mag (ΔM) 0.52 Spectral class G0 (yellow)
Pri motion ra -099 Sec motion ra -099
Pri motion dec +040 Sec motion dec +040
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 146327 Constellation Hercules SAO 45976 HIP 79526
Tycho2 3491-00279-1 Gaia DR2 1386878170041456384 HD 146327 ADS 9975
BD BD+47 2317 Distance 81.77 Distance ly 266.73
 
 
ORBITAL ELEMENTS
 
 
Period (P)188.61y Periastron (T)1892.3y Semi-major axis (a)0.719a
Eccentricity (e)0.271 Inclination (i)99.3° Longitude of periastron (ω)120.4°
Node (Ω)176.1° Notesn ReferenceHrt2001b
Equinox2000 Last observation1997 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 185.0 0.654
2001 184.7 0.665
2002 184.3 0.676
2003 184.0 0.686
2004 183.7 0.695
2005 183.4 0.705
2006 183.1 0.714
2007 182.8 0.723
2008 182.5 0.731
2009 182.2 0.738
2010 181.9 0.746
2011 181.7 0.753
2012 181.4 0.759
2013 181.1 0.765
2014 180.9 0.771
2015 180.6 0.776
2016 180.3 0.780
2017 180.1 0.785
2018 179.8 0.788
2019 179.6 0.791
2020 179.4 0.794
2021 179.1 0.796
2022 178.9 0.797
2023 178.6 0.798
2024 178.4 0.798
2025 178.1 0.798
2026 177.9 0.797
2027 177.7 0.796
2028 177.4 0.794
2029 177.2 0.791
2030 176.9 0.788


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


 
  


wds16137%2B4638a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic