Coord 2000 | 19449-2338 |
Discov num | MTG 4 |
Comp | Coord arcsec 2000 | 19 44 53.80 -23 37 59.3 |
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Date first | 2004 |
Date last | 2019 |
Obs | 8 |
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Pa first | 355 |
Pa last | 329 |
P.A. Now (θ) | 325.8° |
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Sep first | 0.8 |
Sep last | 0.4 |
Sep. Now (ρ) | 0.33" |
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Mag pri | 14.60 |
Mag sec | 15.30 |
delta mag (ΔM) | 0.7 |
Spectral class | M4.5V (red) |
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Pri motion ra | +320 |
Sec motion ra | |||||||||
Pri motion dec | -167 |
Sec motion dec | |||||||||
Notes |
Precise pa | 328.9 |
Precise sep | 0.387 |
Constellation | Sagittarius |
last precise pa | 328.9 |
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last precise sep | 0.387 |
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 | Grade | 4 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 2015 |
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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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 | |
19449-2338 | MTG 4 | 2018 | 7 | 334 | 0.5 | 14.60 | 15.30 | M4.5V | NO | 194453.80-233759.3 | |
19449-2338 | MTG 4 | 2019 | 8 | 329 | 0.4 | 14.60 | 15.30 | M4.5V | NO | 194453.80-233759.3 |