20298+0941 AST 2 AB

 
 
20h 29m 48.41s +09° 41' 19.3" P.A. 94.00 sep 0.2 mag 13.11,16.38 Sp M4.5V
 
 
Coord 2000 20298+0941 Discov num AST   2 Comp AB Coord arcsec 2000 20 29 48.41 +09 41 19.3
Date first 1996 Date last 2021 Obs 30
Pa first 269 Pa last 94.3 P.A. Now (θ) 94.3°
Sep first 0.2 Sep last 0.154 Sep. Now (ρ) 0.154"
Mag pri 13.11 Mag sec 16.38 delta mag (ΔM) 3.27 Spectral class M4.5V (red)
Pri motion ra +669 Sec motion ra
Pri motion dec +101 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
20298+0941 SYSTEM COMPONENTS
 
 
Show name SAO coord wds_name last obs pa sep mag1 mag2 d_mag orb current
Show 20 29 48 +09 41 19 AST 2 AB 2021 30 94 0.2 13.11 16.38 3.27 Y <===
Show 20 29 48 +09 41 19 CRC 37 AD 2012 1 201 9.2 8.20
Triple system
3 estimated visually detectable stars in this system
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Delphinus
 
 
ORBITAL ELEMENTS
 
 
Period (P)1.4694y Periastron (T)2019.248y Semi-major axis (a)0.11a
Eccentricity (e)0.645 Inclination (i)138° Longitude of periastron (ω)232.7°
Node (Ω)129.6° Notesn ReferenceTok2019h
Equinox2000 Last observation2019 Grade2(1=Definitive, 9=Indet.)
label theta rho
2000 2.6 0.070
2001 76.2 0.144
2002 110.2 0.144
2003 337.4 0.058
2004 71.0 0.137
2005 105.5 0.151
2006 294.9 0.041
2007 65.2 0.129
2008 101.1 0.155
2009 202.1 0.035
2010 58.6 0.120
2011 96.8 0.157
2012 154.3 0.064
2013 50.9 0.111
2014 92.6 0.157
2015 136.9 0.091
2016 41.6 0.100
2017 88.4 0.155
2018 126.8 0.111
2019 30.1 0.089
2020 84.1 0.152
2021 119.5 0.127
2022 15.2 0.078
2023 79.5 0.148
2024 113.7 0.138
2025 355.3 0.066
2026 74.6 0.142
2027 108.6 0.146
2028 326.3 0.053
2029 69.2 0.135
2030 104.0 0.152


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



 
 


wds20298%2B0941c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic