Coord 2000 | 20198+4522 |
Discov num | STT 406 |
Comp | Coord arcsec 2000 | 20 19 49.69 +45 21 49.7 |
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Date first | 1845 |
Date last | 2011 |
Obs | 159 |
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Pa first | 133 |
Pa last | 100 |
P.A. Now (θ) | 89.8° |
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Sep first | 0.6 |
Sep last | 0.3 |
Sep. Now (ρ) | 0.22" |
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Mag pri | 7.25 |
Mag sec | 8.74 |
delta mag (ΔM) | 1.49 |
Spectral class | F5IV (yellow-white) |
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Pri motion ra | +018 |
Sec motion ra | +018 |
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Pri motion dec | -029 |
Sec motion dec | -029 |
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Notes |
Precise pa | 99.6 |
Precise sep | 0.318 |
Constellation | Cygnus |
SAO | 49481 |
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HIP | 100241 |
Tycho2 | 3572-00337-1 |
Gaia DR2 | 2081494847057615104 |
HD | 193701 |
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ADS | 13723 |
BD | BD+44 3429 |
Distance | 92.51 |
Distance ly | 301.77 |
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last precise pa | 99.6 |
last precise sep | 0.318 |
Period (P) | 113.5y | Periastron (T) | 1914.5y | Semi-major axis (a) | 0.336a | |||
Eccentricity (e) | 0.85 | Inclination (i) | 128.7° | Longitude of periastron (ω) | 151.5° | |||
Node (Ω) | 101.3° | Note | Grade | 3 | (1=Definitive, 9=Indet.) | |||
Equinox | 2000 | Last observation | 1975 |
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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 |
20198+4522 | STT 406 | 2007 | 165 | 101 | 0.3 | 7.25 | 8.74 | F5IV | NOD | 201949.69+452149.7 | |
20198+4522 | STT 406 | 2009 | 168 | 102 | 0.3 | 7.25 | 8.74 | F5IV | NOD | 201949.69+452149.7 | |
20198+4522 | STT 406 | 2011 | 173 | 100 | 0.3 | 7.25 | 8.74 | F5IV | NO | 201949.69+452149.7 |