15264+4400 STT 296 AB (HD 137805)

 
 
15h 26m 26.56s +44° 00' 13.2" P.A. 273.00 sep 2.3 mag 7.83,9.09 Sp G5 dist. 87.95 pc (286.89 l.y.)
 
 
Coord 2000 15264+4400 Discov num STT 296 Comp AB Coord arcsec 2000 15 26 26.56 +44 00 13.2
Date first 1843 Date last 2020 Obs 193
Pa first 323 Pa last 272.7 P.A. Now (θ) 272.7°
Sep first 1.6 Sep last 2.302 Sep. Now (ρ) 2.302"
Mag pri 7.83 Mag sec 9.09 delta mag (ΔM) 1.26 Spectral class G5 (yellow)
Pri motion ra +109 Sec motion ra +109
Pri motion dec -077 Sec motion dec -077
Notes O (Orbital solution)
This double is physical.
 
 
15264+4400 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 137805 45541 15 26 27 +44 00 13 STT 296 AB 2020 193 273 2.3 7.83 9.09 1.26 Y <===
Show 45541 15 26 27 +44 00 13 STT 296 AC 2016 14 313 80.7 7.83 12.67 4.84
Show 45541 15 26 27 +44 00 13 POP 1221 AD 2015 3 346 68.4 7.83 14.00 6.17
Quadruple system
4 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 137805 Constellation Bootes SAO 45541 HIP 75580
Tycho2 3058-00429-1 Gaia DR2 1394141887452208512 HD 137805 GC 20764
ADS 9639 BD BD+44 2465 Distance 87.95 Distance ly 286.89
 
 
ORBITAL ELEMENTS
 
 
Period (P)9107y± 7046 Periastron (T)1771.7y± 23.8 Semi-major axis (a)6.742a± 3.239
Eccentricity (e)0.695± 0.1 Inclination (i)136.5°± 7.7 Longitude of periastron (ω)59°± 15.8
Node (Ω)44°± 6.9 Notes ReferencePkO2018b
Equinox Last observation Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 277.2 2.052
2001 276.9 2.058
2002 276.7 2.063
2003 276.5 2.068
2004 276.3 2.074
2005 276.1 2.079
2006 275.8 2.084
2007 275.6 2.090
2008 275.4 2.095
2009 275.2 2.100
2010 275.0 2.106
2011 274.8 2.111
2012 274.6 2.116
2013 274.4 2.122
2014 274.2 2.127
2015 273.9 2.133
2016 273.7 2.138
2017 273.5 2.144
2018 273.3 2.149
2019 273.1 2.155
2020 272.9 2.160
2021 272.7 2.166
2022 272.5 2.171
2023 272.3 2.177
2024 272.1 2.182
2025 271.9 2.188
2026 271.7 2.193
2027 271.5 2.199
2028 271.4 2.204
2029 271.2 2.210
2030 271.0 2.216


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



 
 


wds15264%2B4400b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic