Coord 2000 | 20217-3637 |
Discov num | HDS2908 |
Comp | Coord arcsec 2000 | 20 21 43.04 -36 36 35.9 |
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Date first | 1991 |
Date last | 2018 |
Obs | 11 |
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Pa first | 108 |
Pa last | 295 |
P.A. Now (θ) | 100.3° |
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Sep first | 0.1 |
Sep last | 0.1 |
Sep. Now (ρ) | 0.04" |
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Mag pri | 8.25 |
Mag sec | 8.45 |
delta mag (ΔM) | 0.2 |
Spectral class | G0/G1V (yellow) |
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Pri motion ra | +068 |
Sec motion ra | |||||||||
Pri motion dec | -044 |
Sec motion dec | |||||||||
Notes | O
(Orbital solution) |
Precise pa | 295 |
Precise sep | 0.071 |
Constellation | Sagittarius |
SAO | 212038 |
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HIP | 100417 |
Tycho2 | 7454-00791-1 |
Gaia DR2 | 21764909824 |
HD | 193464 |
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CD | CD-3713693 |
CP | CP-37 8776 |
Distance | 59.38 |
Distance ly | 193.7 |
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last precise pa | 295 |
last precise sep | 0.071 |
Period (P) | 12.74y | ± 0.24 | Periastron (T) | 2007.44y | ± 0.52 | Semi-major axis (a) | 0.112a | ± 0.0065 |
Eccentricity (e) | 0.518 | ± 0.046 | Inclination (i) | 80.8° | ± 2.7 | Longitude of periastron (ω) | 338.9° | ± 10.7 |
Node (Ω) | 107.8° | ± 0.6 | Note | Grade | 2 | (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 |
20217-3637 | HDS2908 | 1991 | 1 | 108 | 0.1 | 8.25 | 8.45 | G0/G1V | 202143.04-363635.9 | ||
20217-3637 | HDS2908 | 2008 | 4 | 151 | 0.0 | 8.25 | 8.45 | G0/G1V | 202143.04-363635.9 | ||
20217-3637 | HDS2908 | 2013 | 7 | 104 | 0.2 | 8.25 | 8.45 | G0/G1V | 202143.04-363635.9 | ||
20217-3637 | HDS2908 | 2014 | 8 | 106 | 0.2 | 8.25 | 8.45 | G0/G1V | 202143.04-363635.9 | ||
20217-3637 | HDS2908 | 2015 | 9 | 107 | 0.2 | 8.25 | 8.45 | G0/G1V | 202143.04-363635.9 | ||
20217-3637 | HDS2908 | 2017 | 10 | 290 | 0.1 | 8.25 | 8.45 | G0/G1V | O | 202143.04-363635.9 | |
20217-3637 | HDS2908 | 2018 | 11 | 295 | 0.1 | 8.25 | 8.45 | G0/G1V | O | 202143.04-363635.9 |