Coord 2000 | 19581-4808 |
Discov num | HDS2842 |
Comp | Coord arcsec 2000 | 19 58 04.28 -48 08 01.2 |
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Date first | 1991 |
Date last | 2019 |
Obs | 12 |
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Pa first | 92 |
Pa last | 70 |
P.A. Now (θ) | 78.6° |
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Sep first | 0.3 |
Sep last | 0.2 |
Sep. Now (ρ) | 0.21" |
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Mag pri | 8.61 |
Mag sec | 10.78 |
delta mag (ΔM) | 2.17 |
Spectral class | G0V (yellow) |
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Pri motion ra | +052 |
Sec motion ra | |||||||||
Pri motion dec | +016 |
Sec motion dec | |||||||||
Notes | O
(Orbital solution) |
Precise pa | 70.4 |
Precise sep | 0.191 |
Constellation | Telescopium |
SAO | 229955 |
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HIP | 98274 |
Tycho2 | 8395-00655-1 |
Gaia DR2 | 61800880768 |
HD | 188581 |
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CD | CD-4813359 |
CP | CP-4810294 |
Distance | 53.79 |
Distance ly | 175.46 |
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last precise pa | 70.4 |
last precise sep | 0.191 |
Period (P) | 35.28y | ± 2.48 | Periastron (T) | 2016.036y | ± 0.065 | Semi-major axis (a) | 0.2364a | ± 0.014 |
Eccentricity (e) | 0.738 | ± 0.037 | Inclination (i) | 70.2° | ± 2.2 | Longitude of periastron (ω) | 60.6° | ± 4.1 |
Node (Ω) | 254.2° | ± 2.4 | 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 |
19581-4808 | HDS2842 | 1991 | 1 | 92 | 0.3 | 8.61 | 10.78 | G0V | 195804.28-480801.2 | ||
19581-4808 | HDS2842 | 2009 | 3 | 168 | 0.1 | 8.61 | 10.78 | G0V | 195804.28-480801.2 | ||
19581-4808 | HDS2842 | 2014 | 6 | 254 | 0.1 | 8.61 | 10.78 | G0V | O | 195804.28-480801.2 | |
19581-4808 | HDS2842 | 2015 | 9 | 268 | 0.1 | 8.61 | 10.78 | G0V | O | 195804.28-480801.2 | |
19581-4808 | HDS2842 | 2017 | 10 | 63 | 0.1 | 8.61 | 10.78 | G0V | O | 195804.28-480801.2 | |
19581-4808 | HDS2842 | 2018 | 11 | 65 | 0.1 | 8.61 | 10.78 | G0V | O | 195804.28-480801.2 | |
19581-4808 | HDS2842 | 2019 | 12 | 70 | 0.2 | 8.61 | 10.78 | G0V | O | 195804.28-480801.2 |