20302+2651 WOR 9 AB (HD 340345)

 
 
20h 30m 10.63s +26 50' 33.7" P.A. 225.00 sep 0.5 mag 10.50,10.63 Sp M1V dist. 23.82 pc (77.7 l.y.)
 
 
Coord 2000 20302+2651 Discov num WOR   9 Comp AB Coord arcsec 2000 20 30 10.63 +26 50 33.7
Date first 1959 Date last 2017 Obs 56
Pa first 334 Pa last 225.3 P.A. Now (θ) 225.3°
Sep first 1.3 Sep last 0.45 Sep. Now (ρ) 0.45"
Mag pri 10.50 Mag sec 10.63 delta mag (ΔM) 0.13 Spectral class M1V (red)
Pri motion ra -163 Sec motion ra -146
Pri motion dec -130 Sec motion dec -142
Notes N O (See Notes, Orbital solution)
rPM=0.1 (< 0.3, Physical double)
This double is physical.
 
 
20302+2651 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show HD 340345 20 30 11 +26 50 34 WOR 9 AB 2017 56 225 0.5 10.50 10.63 0.13 Y <===
Show 20 30 11 +26 50 34 BUP 213 AC 2017 20 318 9.7 10.50 12.67 2.17
Show 20 30 11 +26 50 34 BUP 213 AD 2015 19 281 93.0 10.50 11.00 0.50
Show 20 30 11 +26 50 34 BUP 213 AE 2015 9 93 999.9 10.50 10.18 0.32
Show 20 30 11 +26 50 34 LMP 45 AF 2015 10 252 43.7 10.50 13.10 2.60
Sextuple system
6 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Name HD 340345 Constellation Vulpecula HIP 101150 Tycho2 2164-00070-1
Gaia DR2 1856712201709083136 HD 340345 BD BD+26 3915 Distance 23.82
Distance ly 77.7
 
 
ORBITAL ELEMENTS
 
 
Period (P)210.09y Periastron (T)1937.47y Semi-major axis (a)1.421a
Eccentricity (e)0.15 Inclination (i)108° Longitude of periastron (ω)130.8°
Node (Ω)154.3° Notesn ReferenceZir2003
Equinox2000 Last observation1996 Grade5(1=Definitive, 9=Indet.)
label theta rho
2000 288.4 0.623
2001 285.6 0.602
2002 282.6 0.582
2003 279.3 0.563
2004 275.9 0.546
2005 272.2 0.531
2006 268.4 0.517
2007 264.3 0.506
2008 260.1 0.496
2009 255.8 0.490
2010 251.3 0.485
2011 246.8 0.484
2012 242.3 0.485
2013 237.8 0.489
2014 233.5 0.495
2015 229.2 0.504
2016 225.2 0.515
2017 221.3 0.529
2018 217.6 0.544
2019 214.1 0.561
2020 210.9 0.580
2021 207.8 0.600
2022 205.0 0.621
2023 202.4 0.643
2024 199.9 0.666
2025 197.6 0.690
2026 195.5 0.715
2027 193.5 0.740
2028 191.6 0.765
2029 189.8 0.791
2030 188.2 0.817


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



 
 


wds20302%2B2651a.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic