13381+3910 STF 1769 AB (HD 118742)

 
 
13h 38m 01.95s +39° 10' 41.0" P.A. 45.00 sep 1.6 mag 7.91,10.42 Sp G5 dist. 46 pc (150.05 l.y.)
 
 
Coord 2000 13381+3910 Discov num STF1769 Comp AB Coord arcsec 2000 13 38 01.95 +39 10 41.0
Date first 1832 Date last 2015 Obs 56
Pa first 24 Pa last 45.2 P.A. Now (θ) 45.2°
Sep first 2.8 Sep last 1.581 Sep. Now (ρ) 1.581"
Mag pri 7.91 Mag sec 10.42 delta mag (ΔM) 2.51 Spectral class G5 (yellow)
Pri motion ra -226 Sec motion ra -226
Pri motion dec -147 Sec motion dec -147
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
13381+3910 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 118742 63656 13 38 02 +39 10 41 STF 1769 AB 2015 56 45 1.6 7.91 10.42 2.51 Y <===
Show 63656 13 38 02 +39 10 41 STF 1769 AC 2015 38 259 56.2 7.91 9.28 1.37
Show 63656 13 38 02 +39 10 41 STF 1769 AD 2015 8 187 149.4 7.91 12.98 5.07
Show 63656 13 38 02 +39 10 41 TOK 29 AE 2015 4 254 65.6 7.91 16.10 8.19
Show 63656 13 38 02 +39 10 41 KZA 74 AF 2015 6 322 100.3 7.91 13.95 6.04
Show 13 37 57 +39 10 30 STF 1769 CD 2015 7 165 141.8 9.28 12.98 3.70
Show 13 37 57 +39 10 30 TOK 29 CE 2015 5 231 10.5 9.29 16.10 6.81
Sextuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 118742 Constellation Canes Venatici SAO 63656 HIP 66514
Tycho2 3026-00015-1 Gaia DR2 1475768973567635456 HD 118742 GC 18440
ADS 8981 BD BD+39 2663 Distance 46 Distance ly 150.05
 
 
ORBITAL ELEMENTS
 
 
Period (P)2616.3566y± 1148.0789 Periastron (T)2327.7903y± 619.8395 Semi-major axis (a)4.97148a± 3.86654
Eccentricity (e)0.79906± 0.16163 Inclination (i)75.356°± 13.034 Longitude of periastron (ω)40.904°± 120.537
Node (Ω)173.088°± 22.057 Notesn ReferenceIzm2019
Equinox Last observation2015 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 41.5 1.661
2001 41.6 1.653
2002 41.8 1.646
2003 42.0 1.638
2004 42.2 1.631
2005 42.4 1.624
2006 42.6 1.616
2007 42.8 1.609
2008 43.0 1.602
2009 43.2 1.594
2010 43.4 1.587
2011 43.6 1.580
2012 43.8 1.572
2013 44.0 1.565
2014 44.3 1.558
2015 44.5 1.551
2016 44.7 1.543
2017 44.9 1.536
2018 45.1 1.529
2019 45.3 1.522
2020 45.6 1.514
2021 45.8 1.507
2022 46.0 1.500
2023 46.3 1.493
2024 46.5 1.486
2025 46.7 1.479
2026 47.0 1.472
2027 47.2 1.465
2028 47.4 1.457
2029 47.7 1.450
2030 47.9 1.443


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



 
 


wds13381%2B3910a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic