19449-2338 MTG 4

 
 
19h 44m 53.80s -23 37' 59.3" P.A. 313.00 sep 0.2 mag 14.60,15.30 Sp M4.5V
 
 
Coord 2000 19449-2338 Discov num MTG   4 Comp Coord arcsec 2000 19 44 53.80 -23 37 59.3
Date first 2004 Date last 2021 Obs 11
Pa first 355 Pa last 312.9 P.A. Now (θ) 312.9°
Sep first 0.8 Sep last 0.246 Sep. Now (ρ) 0.246"
Mag pri 14.60 Mag sec 15.30 delta mag (ΔM) 0.7 Spectral class M4.5V (red)
Pri motion ra +320 Sec motion ra
Pri motion dec -167 Sec motion dec
Notes N O (See Notes, Orbital solution)
This double is physical.
 
 
OTHER CATALOGS AND DESIGNATIONS
 
 
Constellation Sagittarius
 
 
ORBITAL ELEMENTS
 
 
Period (P)60y Periastron (T)2028.24y Semi-major axis (a)0.703a
Eccentricity (e)0.271 Inclination (i)105.1° Longitude of periastron (ω)316°
Node (Ω)168.9° Notes ReferenceTok2021f
Equinox2000 Last observation2021 Grade4(1=Definitive, 9=Indet.)
label theta rho
2000 0.3 0.720
2001 358.9 0.747
2002 357.6 0.771
2003 356.4 0.791
2004 355.2 0.807
2005 354.1 0.819
2006 353.0 0.826
2007 351.9 0.829
2008 350.8 0.826
2009 349.7 0.818
2010 348.6 0.805
2011 347.4 0.787
2012 346.2 0.762
2013 344.9 0.732
2014 343.4 0.696
2015 341.8 0.654
2016 339.9 0.605
2017 337.7 0.551
2018 334.9 0.491
2019 331.4 0.426
2020 326.5 0.357
2021 319.2 0.286
2022 307.2 0.217
2023 285.7 0.162
2024 251.9 0.143
2025 220.5 0.173
2026 201.8 0.232
2027 191.1 0.300
2028 184.3 0.365
2029 179.5 0.424
2030 175.8 0.473


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



 
 


wds19449-2338c.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic