13207+0257 STF 1734 (HD 115995)

13h 20m 41.57s +02° 56' 31.9" P.A. 173.00 sep 1.1 mag 6.77,7.29 Sp A3V dist. 135.5 pc (442 l.y.)

Coord 2000 13207+0257 Discov num STF1734 Comp Coord arcsec 2000 13 20 41.57 +02 56 31.9
Date first 1830 Date last 2017 Obs 197
Pa first 198 Pa last 173.1 P.A. Now (θ) 173.1°
Sep first 0.7 Sep last 1.069 Sep. Now (ρ) 1.069"
Mag pri 6.77 Mag sec 7.29 delta mag (ΔM) 0.52 Spectral class A3V (white)
Pri motion ra -060 Sec motion ra -060
Pri motion dec -012 Sec motion dec -012
Notes O (Orbital solution)




This double is physical.



OTHER CATALOGS AND DESIGNATIONS

Name HD 115995 Constellation Virgo SAO 119889 HIP 65119
Tycho2 0303-01045-1 Gaia DR2 3715515292249335424 HD 115995 HR 5031
GC 18050 ADS 8864 BD BD+03 2758 Distance 135.5
Distance ly 442




ORBITAL ELEMENTS

Period (P)973.8333y± 439.7244 Periastron (T)2119.6129y± 53.5238 Semi-major axis (a)1.46098a± 0.60774
Eccentricity (e)0.61244± 0.31005 Inclination (i)106.766°± 6.565 Longitude of periastron (ω)87.57°± 32.025
Node (Ω)166.63°± 12.712 Notes ReferenceIzm2019
Equinox Last observation2015 Grade4(1=Definitive, 9=Indet.)

label theta rho
2000 176.3 1.121
2001 176.2 1.120
2002 176.0 1.118
2003 175.9 1.116
2004 175.7 1.114
2005 175.6 1.112
2006 175.4 1.110
2007 175.3 1.108
2008 175.2 1.106
2009 175.0 1.103
2010 174.9 1.101
2011 174.7 1.099
2012 174.6 1.096
2013 174.4 1.094
2014 174.3 1.091
2015 174.1 1.088
2016 174.0 1.085
2017 173.8 1.082
2018 173.6 1.080
2019 173.5 1.077
2020 173.3 1.073
2021 173.2 1.070
2022 173.0 1.067
2023 172.9 1.064
2024 172.7 1.060
2025 172.5 1.057
2026 172.4 1.053
2027 172.2 1.049
2028 172.1 1.045
2029 171.9 1.041
2030 171.7 1.037


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



 
 


wds13207%2B0257a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic