Coord 2000 | 20123-0806 |
Discov num | BU 1205 |
Comp | Coord arcsec 2000 | 20 12 15.32 -08 05 32.1 |
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Date first | 1890 |
Date last | 2008 |
Obs | 22 |
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Pa first | 49 |
Pa last | 212 |
P.A. Now (θ) | 42.7° |
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Sep first | 0.6 |
Sep last | 0.2 |
Sep. Now (ρ) | 0.46" |
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Mag pri | 7.50 |
Mag sec | 8.80 |
delta mag (ΔM) | 1.3 |
Spectral class | F5V (yellow-white) |
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Pri motion ra | +015 |
Sec motion ra | |||||||||
Pri motion dec | -035 |
Sec motion dec | |||||||||
Notes | O
(Orbital solution) |
Precise pa | 211.8 |
Precise sep | 0.247 |
Constellation | Aquila |
HIP | 99558 |
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Tycho2 | 5740-00887-1 |
Gaia DR2 | 52139704960 |
HD | 191841 |
ADS | 13493 |
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BD | BD-08 5272 |
Distance | 73.91 |
Distance ly | 241.09 |
last precise pa | 211.8 |
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last precise sep | 0.247 |
Period (P) | 139.9y | Periastron (T) | 1983.5y | Semi-major axis (a) | 0.486a | |||
Eccentricity (e) | 0.384 | Inclination (i) | 78.3° | Longitude of periastron (ω) | 10.4° | |||
Node (Ω) | 231.24° | Note | Grade | 4 | (1=Definitive, 9=Indet.) | |||
Equinox | 2000 | Last observation | 2008 |
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 |
20123-0806 | BU 1205 | 1991 | 21 | 249 | 0.2 | 7.50 | 8.80 | F5V | O | 201215.32-080532.1 | |
20123-0806 | BU 1205 | 2008 | 22 | 212 | 0.2 | 7.50 | 8.80 | F5V | O | 201215.32-080532.1 |