10301+2048 STF 1439 (HD 90915)

 
 
10h 30m 06.42s +20° 48' 04.3" P.A. 73.00 sep 1.4 mag 8.32,8.87 Sp G0V dist. 76.63 pc (249.97 l.y.)
 
 
Coord 2000 10301+2048 Discov num STF1439 Comp Coord arcsec 2000 10 30 06.42 +20 48 04.3
Date first 1829 Date last 2019 Obs 201
Pa first 131 Pa last 72.9 P.A. Now (θ) 72.9°
Sep first 2.0 Sep last 1.429 Sep. Now (ρ) 1.429"
Mag pri 8.32 Mag sec 8.87 delta mag (ΔM) 0.55 Spectral class G0V (yellow)
Pri motion ra +095 Sec motion ra +095
Pri motion dec -064 Sec motion dec -064
Notes O (Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 90915 Constellation Leo SAO 81385 HIP 51419
Tycho2 1427-00809-1 Gaia DR2 720998775614933376 HD 90915 GC 14425
ADS 7802 BD BD+21 2202 Distance 76.63 Distance ly 249.97
 
 
ORBITAL ELEMENTS
 
 
Period (P)789.3505y± 347.2763 Periastron (T)1767.328y± 59.3052 Semi-major axis (a)2.97269a± 1.21457
Eccentricity (e)0.66568± 0.22683 Inclination (i)106.373°± 8.393 Longitude of periastron (ω)283.11°± 26.004
Node (Ω)140.625°± 10.588 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 78.8 1.372
2001 78.3 1.369
2002 77.9 1.367
2003 77.4 1.364
2004 77.0 1.362
2005 76.5 1.359
2006 76.1 1.357
2007 75.6 1.354
2008 75.1 1.352
2009 74.7 1.350
2010 74.2 1.348
2011 73.7 1.346
2012 73.3 1.344
2013 72.8 1.342
2014 72.3 1.340
2015 71.8 1.338
2016 71.4 1.336
2017 70.9 1.334
2018 70.4 1.333
2019 69.9 1.331
2020 69.5 1.330
2021 69.0 1.328
2022 68.5 1.327
2023 68.0 1.326
2024 67.5 1.324
2025 67.1 1.323
2026 66.6 1.322
2027 66.1 1.321
2028 65.6 1.320
2029 65.1 1.319
2030 64.6 1.319


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



 
 


wds10301%2B2048a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic