09513+6037 STF 1381 (HD 84998)

 
 
09h 51m 15.22s +60 37' 00.1" P.A. 187.00 sep 0.8 mag 8.93,9.20 Sp G0 dist. 190.11 pc (620.14 l.y.)
 
 
Coord 2000 09513+6037 Discov num STF1381 Comp Coord arcsec 2000 09 51 15.22 +60 37 00.1
Date first 1832 Date last 2017 Obs 36
Pa first 214 Pa last 187.3 P.A. Now (θ) 187.3°
Sep first 1.5 Sep last 0.798 Sep. Now (ρ) 0.798"
Mag pri 8.93 Mag sec 9.20 delta mag (ΔM) 0.27 Spectral class G0 (yellow)
Pri motion ra -018 Sec motion ra -018
Pri motion dec +008 Sec motion dec +008
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 84998 Constellation Ursa Major SAO 15002 HIP 48343
Tycho2 4136-01412-1 Gaia DR2 1050672528157395328 HD 84998 GC 13542
ADS 7536 BD BD+61 1146 Distance 190.11 Distance ly 620.14
 
 
ORBITAL ELEMENTS
 
 
Period (P)1787.6479y± 725.5107 Periastron (T)2098.6393y± 234.0108 Semi-major axis (a)2.93227a± 1.51891
Eccentricity (e)0.94926± 0.24018 Inclination (i)114.995°± 17.693 Longitude of periastron (ω)71.237°± 43.483
Node (Ω)115.994°± 68.258 Notes ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 190.8 0.890
2001 190.5 0.885
2002 190.2 0.880
2003 189.9 0.875
2004 189.6 0.870
2005 189.3 0.866
2006 189.0 0.861
2007 188.7 0.856
2008 188.4 0.851
2009 188.1 0.846
2010 187.7 0.841
2011 187.4 0.836
2012 187.1 0.831
2013 186.8 0.826
2014 186.4 0.822
2015 186.1 0.817
2016 185.7 0.812
2017 185.4 0.807
2018 185.0 0.802
2019 184.7 0.797
2020 184.3 0.792
2021 183.9 0.787
2022 183.5 0.782
2023 183.2 0.777
2024 182.8 0.772
2025 182.4 0.767
2026 182.0 0.762
2027 181.6 0.756
2028 181.2 0.751
2029 180.8 0.746
2030 180.4 0.741


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



 
 


wds09513%2B6037a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic