03087-4801 HDS 399 (HD 19716)

03h 08m 40.22s -48° 00' 59.1" P.A. 194.00 sep 0.1 mag 8.57,9.95 Sp F8/G0V dist. 76.69 pc (250.16 l.y.)

Coord 2000 03087-4801 Discov num HDS 399 Comp Coord arcsec 2000 03 08 40.22 -48 00 59.1
Date first 1991 Date last 2021 Obs 8
Pa first 234 Pa last 193.9 P.A. Now (θ) 193.9°
Sep first 0.2 Sep last 0.096 Sep. Now (ρ) 0.096"
Mag pri 8.57 Mag sec 9.95 delta mag (ΔM) 1.38 Spectral class F8/G0V (yellow-white)
Pri motion ra +083 Sec motion ra
Pri motion dec -024 Sec motion dec
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 19716 Constellation Horologium SAO 216182 HIP 14609
Tycho2 8061-00487-1 Gaia DR2 4750399752552586112 HD 19716 GC 3775
CD CD-48 856 CP CP-48 331 Distance 76.69 Distance ly 250.16




ORBITAL ELEMENTS

Period (P)35.37y Periastron (T)2015.44y Semi-major axis (a)0.147a
Eccentricity (e)0.15 Inclination (i)63.9° Longitude of periastron (ω)223.2°
Node (Ω)237.4° Notes ReferenceTok2019d
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 275.1 0.105
2001 285.1 0.092
2002 298.1 0.081
2003 314.6 0.073
2004 333.5 0.070
2005 352.1 0.074
2006 7.9 0.083
2007 20.3 0.094
2008 30.0 0.105
2009 37.8 0.116
2010 44.3 0.124
2011 50.3 0.129
2012 55.9 0.130
2013 61.7 0.126
2014 68.1 0.118
2015 75.8 0.105
2016 85.9 0.090
2017 100.5 0.074
2018 122.2 0.061
2019 150.4 0.058
2020 176.5 0.065
2021 194.8 0.081
2022 206.9 0.098
2023 215.4 0.115
2024 221.7 0.131
2025 226.8 0.143
2026 231.1 0.153
2027 235.1 0.159
2028 238.8 0.162
2029 242.4 0.162
2030 246.1 0.159


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



 
 


wds03087-4801a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic