19449-2338 MTG   4

 
 
19h 44m 53.80s -23 37' 59.3" P.A. 335.3 sep 0.49 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
2017
Obs
6
Pa first
355
Pa last
336
P.A. Now (θ)
335.3°
Sep first
0.8
Sep last
0.5
Sep. Now (ρ)
0.49"
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
 
 
Precise pa
335.7
Precise sep
0.517
Cdsa2 id
MTG 4
Constellation
Sagittarius
Ra deg
19.74827777777778
De deg
-23.63313888888889
last precise pa
335.7
last precise sep
0.517
 
 
ORBITAL ELEMENTS
 
 
Period (P)33y± 2.6 Periastron (T)2023.21y± 0.55 Semi-major axis (a)0.459a± 0.015
Eccentricity (e)0.804± 0.056 Inclination (i)123.2°± 9 Longitude of periastron (ω)359°± 19
Node (Ω)171.7°± 8.7 Note Grade4(1=Definitive, 9=Indet.)
Equinox2000 Last observation2015
label rho theta
2000 0.714 0.3
2001 0.746 358.9
2002 0.772 357.6
2003 0.793 356.4
2004 0.809 355.3
2005 0.820 354.1
2006 0.826 353.0
2007 0.828 351.9
2008 0.824 350.8
2009 0.816 349.7
2010 0.803 348.6
2011 0.785 347.4
2012 0.761 346.1
2013 0.732 344.8
2014 0.697 343.3
2015 0.656 341.7
2016 0.608 339.8
2017 0.553 337.6
2018 0.489 334.9
2019 0.416 331.2
2020 0.331 325.8
2021 0.232 316.1
2022 0.123 289.9
2023 0.086 192.4
2024 0.086 87.8
2025 0.182 36.9
2026 0.285 22.6
2027 0.376 15.7
2028 0.454 11.3
2029 0.521 8.1
2030 0.580 5.7

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

grafico orbita





wds19449-2338b.png orbit plot
Measures: green=micrometric, blue=interferometric, purple=photographic
 
 
WDS HISTORIC DATA
 
 
coord_2000 discov_num comp epoch obs pa sep mag_pri mag_sec spectr notes coord_arcsec_2000
19449-2338 MTG 4 2005 2 353 0.8 9.00 9.10 K 194453.80-233759.3
19449-2338 MTG 4 2010 3 348 0.8 9.00 9.10 K 194453.80-233759.3
19449-2338 MTG 4 2014 4 342 0.7 9.00 9.10 K 194453.80-233759.3
19449-2338 MTG 4 2015 5 341 0.6 9.00 9.10 K 194453.80-233759.3
19449-2338 MTG 4 2017 6 336 0.5 14.60 15.30 M4.5V NO 194453.80-233759.3

If you need more information about this double, apply for a data request form to the WDS.