19449-2338 MTG   4

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	2015		Obs	5
Pa first	355		Pa last	341		P.A. Now (θ)	341°
Sep first	0.8		Sep last	0.6		Sep. Now (ρ)	0.6"
Mag pri	14.10		Mag sec	15.00		delta mag (ΔM)	0.9		Spectral class
Pri motion ra	+320		Sec motion ra
Pri motion dec	-167		Sec motion dec
Notes	O K (Orbital solution, K-band or other infrared magnitudes)

This double is physical.

Precise pa	340.9		Precise sep	0.631		Constellation	Sagittarius		last precise pa	340.9
last precise sep	0.631

Period (P)	31.2y		Periastron (T)	2021.7y		Semi-major axis (a)	0.45a
Eccentricity (e)	0.92		Inclination (i)	140°		Longitude of periastron (ω)	332°
Node (Ω)	150°		Note			Grade	5	(1=Definitive, 9=Indet.)
Equinox	2000		Last observation	2015

label rho theta 2000 0.719 359.1 2001 0.748 357.8 2002 0.772 356.6 2003 0.792 355.5 2004 0.807 354.4 2005 0.817 353.3 2006 0.823 352.3 2007 0.825 351.2 2008 0.822 350.2 2009 0.814 349.2 2010 0.802 348.1 2011 0.785 347.0 2012 0.763 345.8 2013 0.735 344.5 2014 0.701 343.2 2015 0.660 341.7 2016 0.612 339.9 2017 0.554 337.9 2018 0.486 335.3 2019 0.403 331.7 2020 0.299 326.0 2021 0.157 311.7 2022 0.069 78.5 2023 0.203 29.9 2024 0.308 18.9 2025 0.395 13.2 2026 0.469 9.4 2027 0.532 6.6 2028 0.587 4.4 2029 0.635 2.5 2030 0.677 0.9 Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
		Measures: green=micrometric, blue=interferometric, purple=photographic

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

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