08531+5457 A 1584 (HD 75553)

 
 
08h 53m 08.05s +54° 57' 11.0" P.A. 97.00 sep 0.6 mag 8.99,7.72 Sp G0 dist. 52.11 pc (169.98 l.y.)
 
 
Coord 2000 08531+5457 Discov num A  1584 Comp Coord arcsec 2000 08 53 08.05 +54 57 11.0
Date first 1907 Date last 2022 Obs 120
Pa first 168 Pa last 97.4 P.A. Now (θ) 100.7°
Sep first 0.3 Sep last 0.63 Sep. Now (ρ) 0.664"
Mag pri 8.99 Mag sec 7.72 delta mag (ΔM) 1.27 Spectral class G0 (yellow)
Pri motion ra +038 Sec motion ra +038
Pri motion dec +042 Sec motion dec +042
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 75553 Constellation Ursa Major SAO 27027 HIP 43630
Tycho2 3798-01356-1 HD 75553 GC 12238 ADS 7054
BD BD+55 1297 Distance 52.11 Distance ly 169.98
 
 
ORBITAL ELEMENTS
 
 
Period (P)70.89y Periastron (T)1985.01y Semi-major axis (a)0.419a
Eccentricity (e)0.712 Inclination (i)33.2° Longitude of periastron (ω)39.5°
Node (Ω)243.1° Notesn ReferenceMsn2014a
Equinox2000 Last observation2013 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 71.0 0.536
2001 72.8 0.553
2002 74.4 0.569
2003 76.0 0.583
2004 77.5 0.596
2005 79.0 0.609
2006 80.3 0.619
2007 81.7 0.629
2008 83.0 0.638
2009 84.3 0.646
2010 85.5 0.653
2011 86.7 0.659
2012 87.9 0.664
2013 89.1 0.668
2014 90.3 0.671
2015 91.4 0.674
2016 92.6 0.675
2017 93.7 0.676
2018 94.9 0.676
2019 96.0 0.675
2020 97.2 0.673
2021 98.3 0.671
2022 99.5 0.668
2023 100.7 0.664
2024 101.9 0.659
2025 103.1 0.654
2026 104.3 0.647
2027 105.6 0.640
2028 106.9 0.633
2029 108.2 0.624
2030 109.6 0.615


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



 
 


wds08531%2B5457a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic