09149+0427 HEI 350 (HD 79555)

 
 
09h 14m 53.72s +04° 26' 34.4" P.A. 349.00 sep 0.5 mag 8.00,11.00 Sp K4V dist. 17.96 pc (58.59 l.y.)
 
 
Coord 2000 09149+0427 Discov num HEI 350 Comp Coord arcsec 2000 09 14 53.72 +04 26 34.4
Date first 1987 Date last 2021 Obs 36
Pa first 7 Pa last 348.7 P.A. Now (θ) 348.7°
Sep first 0.7 Sep last 0.547 Sep. Now (ρ) 0.547"
Mag pri 8.00 Mag sec 11.00 delta mag (ΔM) 3 Spectral class K4V (yellow-orange)
Pri motion ra -102 Sec motion ra
Pri motion dec +020 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 79555 Constellation Hydra SAO 117534 HIP 45383
Tycho2 0230-00407-1 Gaia DR2 579567598502090240 HD 79555 GL Gl 339A
BD BD+05 2143 Distance 17.96 Distance ly 58.59
 
 
ORBITAL ELEMENTS SOLUTION #1
 
 
Period (P)62.68y± 2.88 Periastron (T)1984.83y± 1.6 Semi-major axis (a)0.81a± 0.037
Eccentricity (e)0.2 Inclination (i)136°± 3 Longitude of periastron (ω)263.6°± 10.6
Node (Ω)102.3°± 2.1 Notesn ReferenceTok2016e
Equinox2000 Last observation Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 92.6 0.823
2001 88.7 0.828
2002 84.9 0.830
2003 81.0 0.828
2004 77.1 0.824
2005 73.2 0.818
2006 69.2 0.809
2007 65.1 0.799
2008 60.9 0.788
2009 56.5 0.776
2010 52.0 0.763
2011 47.4 0.751
2012 42.6 0.739
2013 37.7 0.728
2014 32.6 0.718
2015 27.4 0.710
2016 22.1 0.704
2017 16.7 0.700
2018 11.2 0.698
2019 5.8 0.698
2020 0.4 0.701
2021 355.0 0.705
2022 349.7 0.711
2023 344.5 0.719
2024 339.4 0.728
2025 334.5 0.738
2026 329.7 0.749
2027 325.0 0.759
2028 320.4 0.769
2029 316.0 0.778
2030 311.7 0.785


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


 
  


wds09149%2B0427b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic		  
 
 
ORBITAL ELEMENTS SOLUTION #2
 
 
Period (P)55.37y Periastron (T)1969.13y Semi-major axis (a)0.937a
Eccentricity (e)0.6 Inclination (i)125.5° Longitude of periastron (ω)72.8°
Node (Ω)344° Notesn ReferenceTok2020g
Equinox2000 Last observation2019 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 92.0 0.891
2001 88.6 0.875
2002 85.1 0.859
2003 81.4 0.844
2004 77.6 0.829
2005 73.7 0.815
2006 69.6 0.802
2007 65.4 0.789
2008 61.1 0.778
2009 56.7 0.768
2010 52.1 0.758
2011 47.4 0.749
2012 42.7 0.741
2013 37.8 0.733
2014 32.8 0.724
2015 27.7 0.715
2016 22.4 0.704
2017 17.0 0.690
2018 11.2 0.671
2019 5.1 0.645
2020 358.4 0.608
2021 350.6 0.557
2022 340.9 0.486
2023 327.0 0.390
2024 302.5 0.279
2025 255.9 0.221
2026 211.7 0.292
2027 189.8 0.416
2028 178.0 0.535
2029 170.2 0.637
2030 164.5 0.722


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


 
  


wds09149%2B0427d.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic