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 |
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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 |
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|
| Pri motion dec |
-167 |
|
Sec motion dec |
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| 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 | | |
Reference | Tok2021f | |
| Equinox | 2000 | |
Last observation | 2021 | |
Grade | 4 | (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 |
| 2031 |
172.8 |
0.511 |
| 2032 |
170.1 |
0.537 |
| 2033 |
167.6 |
0.551 |
| 2034 |
165.1 |
0.554 |
| 2035 |
162.7 |
0.546 |
| 2036 |
160.1 |
0.529 |
| 2037 |
157.3 |
0.504 |
| 2038 |
154.2 |
0.473 |
| 2039 |
150.6 |
0.437 |
| 2040 |
146.4 |
0.397 |
| 2041 |
141.1 |
0.355 |
| 2042 |
134.4 |
0.314 |
| 2043 |
125.8 |
0.275 |
| 2044 |
114.5 |
0.241 |
| 2045 |
100.2 |
0.218 |
| 2046 |
83.6 |
0.209 |
| 2047 |
66.9 |
0.216 |
| 2048 |
52.4 |
0.239 |
| 2049 |
40.8 |
0.272 |
| 2050 |
32.0 |
0.312 |
|
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Note: Theta is PA, Rho is Sep. For yearly orbits, data refer to Jan 1st.
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Measures: green=micrometric, blue=interferometric, purple=photographic |
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