21041+0300 DSG 6 Aa,Ab

 
 
21h 04m 07.38s +02° 59' 40.1" P.A. 155.00 sep 0.0 mag 7.60,9.10 Sp F9V+G9V dist. 51.89 pc (169.27 l.y.)
 
 
Coord 2000 21041+0300 Discov num DSG   6 Comp Aa,Ab Coord arcsec 2000 21 04 07.38 +02 59 40.1
Date first 2012 Date last 2015 Obs 8
Pa first 225 Pa last 155.3 P.A. Now (θ) 155.3°
Sep first 0.0 Sep last 0.009 Sep. Now (ρ) 0.009"
Mag pri 7.60 Mag sec 9.10 delta mag (ΔM) 1.5 Spectral class F9V+G9V (yellow-white/yellow)
Pri motion ra -274 Sec motion ra
Pri motion dec -372 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
21041+0300 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 126509 21 04 07 +02 59 40 DSG 6 Aa,Ab 2015 8 155 0.0 7.60 9.10 1.50 Y <===
Show HD 200580 126509 21 04 07 +02 59 40 WSI 6 AB 2021 35 53 0.1 7.50 9.50 2.00 Y
Triple system
2 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Equuleus SAO 126509 HIP 103987 Tycho2 0530-00708-1
HD 200580 BD BD+02 4295 Distance 51.89 Distance ly 169.27
 
 
ORBITAL ELEMENTS
 
 
Period (P)1.03483y± 0.00008 Periastron (T)2014.6223y± 0.0089 Semi-major axis (a)0.0284a
Eccentricity (e)0.0934± 0.004 Inclination (i)68.6°± 13.7 Longitude of periastron (ω)124.9°± 3.1
Node (Ω)97.3°± 12.5 Notesn ReferenceTok2017a
Equinox2000 Last observation2015 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 141.7 0.013
2001 125.9 0.017
2002 116.3 0.021
2003 109.7 0.025
2004 104.5 0.028
2005 100.1 0.029
2006 96.1 0.030
2007 92.0 0.029
2008 87.8 0.028
2009 83.0 0.026
2010 77.2 0.023
2011 69.6 0.020
2012 58.9 0.017
2013 42.7 0.013
2014 18.7 0.011
2015 350.5 0.011
2016 327.3 0.014
2017 311.6 0.017
2018 301.1 0.020
2019 293.5 0.023
2020 287.5 0.025
2021 282.2 0.027
2022 277.3 0.027
2023 272.1 0.026
2024 266.2 0.023
2025 258.7 0.020
2026 247.6 0.016
2027 228.9 0.012
2028 196.9 0.010
2029 160.1 0.011
2030 136.2 0.014


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



 
 


wds21041%2B0300b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic