08507+1800 A 2473 (HD 75470)

 
 
08h 50m 40.42s +18° 00' 12.2" P.A. 92.00 sep 0.2 mag 7.66,7.57 Sp G5 dist. 361.01 pc (1177.61 l.y.)
 
 
Coord 2000 08507+1800 Discov num A  2473 Comp Coord arcsec 2000 08 50 40.42 +18 00 12.2
Date first 1912 Date last 2016 Obs 116
Pa first 325 Pa last 92.4 P.A. Now (θ) 318.5°
Sep first 0.3 Sep last 0.247 Sep. Now (ρ) 0.242"
Mag pri 7.66 Mag sec 7.57 delta mag (ΔM) 0.09 Spectral class G5 (yellow)
Pri motion ra -013 Sec motion ra
Pri motion dec +012 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 75470 Constellation Cancer SAO 98161 HIP 43421
Tycho2 1396-02053-1 Gaia DR2 659943887061932160 HD 75470 GC 12196
ADS 7039 BD BD+18 2057 Distance 361.01 Distance ly 1177.61
 
 
ORBITAL ELEMENTS
 
 
Period (P)113.4y± 1 Periastron (T)2018.01y± 0.5 Semi-major axis (a)0.979a± 0.04
Eccentricity (e)0.972± 0.01 Inclination (i)80.2°± 1 Longitude of periastron (ω)89°± 1
Node (Ω)115°± 1 Notesn ReferenceDoc2016d
Equinox2000 Last observation2009 Grade3(1=Definitive, 9=Indet.)
label theta rho
2000 66.6 0.292
2001 68.1 0.290
2002 69.5 0.287
2003 71.0 0.284
2004 72.5 0.281
2005 74.1 0.278
2006 75.7 0.274
2007 77.3 0.269
2008 79.1 0.264
2009 80.8 0.259
2010 82.7 0.252
2011 84.7 0.244
2012 86.8 0.235
2013 89.1 0.225
2014 91.6 0.212
2015 94.6 0.195
2016 98.2 0.171
2017 103.4 0.134
2018 157.6 0.007
2019 305.7 0.138
2020 310.5 0.180
2021 313.7 0.207
2022 316.3 0.227
2023 318.5 0.242
2024 320.5 0.255
2025 322.3 0.266
2026 324.0 0.275
2027 325.5 0.283
2028 327.0 0.290
2029 328.4 0.296
2030 329.8 0.301


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



 
 


wds08507%2B1800b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic