| Coord 2000 | 20205-2749 |
Discov num | RST3255 |
Comp | Coord arcsec 2000 | 20 20 28.13 -27 49 28.4 |
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| Date first | 1935 |
Date last | 2019 |
Obs | 10 |
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| Pa first | 71 |
Pa last | 284 |
P.A. Now (θ) | 16.9° |
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| Sep first | 0.2 |
Sep last | 0.1 |
Sep. Now (ρ) | 0.14" |
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| Mag pri | 10.60 |
Mag sec | 10.60 |
delta mag (ΔM) | 0 |
Spectral class | G1/2V (yellow) |
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| Pri motion ra | +033 |
Sec motion ra | |||||||||
| Pri motion dec | -006 |
Sec motion dec | |||||||||
| Notes | O
(Orbital solution) |
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| Precise pa | 284.2 |
Precise sep | 0.121 |
Constellation | Sagittarius |
SAO | 189158 |
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| Tycho2 | 6914-01503-1 |
Gaia DR2 | 6846141929538210560 |
HD | 193280 |
last precise pa | 284.2 |
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| last precise sep | 0.121 |
| Period (P) | 45.7y | Periastron (T) | 1951.9y | Semi-major axis (a) | 0.217a | |||
| Eccentricity (e) | 0.16 | Inclination (i) | 55.4° | Longitude of periastron (ω) | 91.9° | |||
| Node (Ω) | 98° | Note | Grade | 4 | (1=Definitive, 9=Indet.) | |||
| Equinox | 2000 | Last observation | 1984 |
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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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| coord_2000 | discov_num | comp | epoch | obs | pa | sep | mag_pri | mag_sec | spectr | notes | coord_arcsec_2000 |
| 20205-2749 | RST3255 | 1984 | 7 | 76 | 0.1 | 10.60 | 10.60 | G1/2V | NO | 202028.13-274928.4 | |
| 20205-2749 | RST3255 | 2017 | 8 | 281 | 0.1 | 10.60 | 10.60 | G1/2V | O | 202028.13-274928.4 | |
| 20205-2749 | RST3255 | 2018 | 9 | 282 | 0.1 | 10.60 | 10.60 | G1/2V | O | 202028.13-274928.4 | |
| 20205-2749 | RST3255 | 2019 | 10 | 284 | 0.1 | 10.60 | 10.60 | G1/2V | O | 202028.13-274928.4 |