11537+7345 BU 794 AB (HD 103246)

11h 53m 43.07s +73° 45' 21.6" P.A. 63.00 sep 0.5 mag 7.23,8.32 Sp F8V dist. 58.17 pc (189.75 l.y.)

Coord 2000 11537+7345 Discov num BU  794 Comp AB Coord arcsec 2000 11 53 43.07 +73 45 21.6
Date first 1881 Date last 2018 Obs 130
Pa first 107 Pa last 63.1 P.A. Now (θ) 77.8°
Sep first 0.4 Sep last 0.48 Sep. Now (ρ) 0.509"
Mag pri 7.23 Mag sec 8.32 delta mag (ΔM) 1.09 Spectral class F8V (yellow-white)
Pri motion ra -048 Sec motion ra
Pri motion dec -117 Sec motion dec
Notes N O (See Notes, Orbital solution)




This double is physical.



11537+7345 SYSTEM COMPONENTS

Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 103246 7445 11 53 43 +73 45 22 BU 794 AB 2018 130 63 0.5 7.23 8.32 1.09 Y <===
Show 7445 11 53 43 +73 45 22 BU 794 AB,C 2015 8 81 5.7 6.84 16.50 9.66
Show 7445 11 53 43 +73 45 22 BU 794 AB,D 2015 8 59 37.0 6.84 14.70 7.86


Quadruple system
5 estimated visually detectable stars in this system



OTHER CATALOGS AND DESIGNATIONS

Name HD 103246 Constellation Draco SAO 7445 HIP 57994
Tycho2 4399-01256-1 Gaia DR2 1075979849854380032 HD 103246 GC 16266
ADS 8337 BD BD+74 476 Distance 58.17 Distance ly 189.75




ORBITAL ELEMENTS

Period (P)76.7y Periastron (T)1987.3y Semi-major axis (a)0.41a
Eccentricity (e)0.5 Inclination (i)39° Longitude of periastron (ω)247°
Node (Ω)22° Notesn ReferenceSod1999
Equinox2000 Last observation Grade2(1=Definitive, 9=Indet.)

label theta rho
2000 26.3 0.403
2001 29.4 0.418
2002 32.3 0.432
2003 35.1 0.444
2004 37.7 0.455
2005 40.2 0.465
2006 42.6 0.474
2007 45.0 0.482
2008 47.2 0.489
2009 49.4 0.495
2010 51.6 0.500
2011 53.7 0.505
2012 55.7 0.508
2013 57.8 0.511
2014 59.8 0.513
2015 61.8 0.515
2016 63.8 0.516
2017 65.8 0.516
2018 67.8 0.516
2019 69.8 0.516
2020 71.8 0.515
2021 73.8 0.513
2022 75.8 0.511
2023 77.8 0.509
2024 79.9 0.506
2025 82.0 0.503
2026 84.1 0.500
2027 86.2 0.496
2028 88.4 0.493
2029 90.6 0.488
2030 92.9 0.484


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



 
 


wds11537%2B7345a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic