Coord 2000 | 20057-3743 |
Discov num | HDS2865 |
Comp | Coord arcsec 2000 | 20 05 41.20 -37 42 53.2 |
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Date first | 1991 |
Date last | 2019 |
Obs | 8 |
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Pa first | 51 |
Pa last | 206 |
P.A. Now (θ) | 204.4° |
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Sep first | 0.2 |
Sep last | 0.1 |
Sep. Now (ρ) | 0.11" |
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Mag pri | 8.53 |
Mag sec | 9.11 |
delta mag (ΔM) | 0.58 |
Spectral class | F3V (yellow-white) |
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Pri motion ra | +017 |
Sec motion ra | |||||||||
Pri motion dec | -007 |
Sec motion dec | |||||||||
Notes | O
(Orbital solution) |
Precise pa | 205.6 |
Precise sep | 0.109 |
Constellation | Sagittarius |
SAO | 211799 |
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HIP | 98979 |
Tycho2 | 7947-03226-1 |
Gaia DR2 | 83945134080 |
HD | 190289 |
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CD | CD-3813850 |
CP | CP-38 7940 |
Distance | 149.03 |
Distance ly | 486.14 |
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last precise pa | 205.6 |
last precise sep | 0.109 |
Period (P) | 50y | Periastron (T) | 2018.71y | ± 0.56 | Semi-major axis (a) | 0.1778a | ± 0.0043 | |
Eccentricity (e) | 0.328 | ± 0.04 | Inclination (i) | 131.5° | ± 4.2 | Longitude of periastron (ω) | 131.7° | ± 6.6 |
Node (Ω) | 4.2° | ± 3.7 | Note | Grade | 4 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation |
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 |
20057-3743 | HDS2865 | 1991 | 1 | 51 | 0.2 | 8.53 | 9.11 | F3V | 200541.20-374253.2 | ||
20057-3743 | HDS2865 | 2008 | 2 | 170 | 0.2 | 8.53 | 9.11 | F3V | 200541.20-374253.2 | ||
20057-3743 | HDS2865 | 2014 | 3 | 293 | 0.1 | 8.53 | 9.11 | F3V | 200541.20-374253.2 | ||
20057-3743 | HDS2865 | 2015 | 5 | 276 | 0.1 | 8.53 | 9.11 | F3V | 200541.20-374253.2 | ||
20057-3743 | HDS2865 | 2017 | 6 | 239 | 0.1 | 8.53 | 9.11 | F3V | O | 200541.20-374253.2 | |
20057-3743 | HDS2865 | 2018 | 7 | 224 | 0.1 | 8.53 | 9.11 | F3V | O | 200541.20-374253.2 | |
20057-3743 | HDS2865 | 2019 | 8 | 206 | 0.1 | 8.53 | 9.11 | F3V | O | 200541.20-374253.2 |