Coord 2000 | 19550+4152 |
Discov num | HO 581 |
Comp | Coord arcsec 2000 | 19 54 58.40 +41 52 17.6 |
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Date first | 1895 |
Date last | 2006 |
Obs | 118 |
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Pa first | 258 |
Pa last | 133 |
P.A. Now (θ) | 56.9° |
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Sep first | 0.3 |
Sep last | 0.3 |
Sep. Now (ρ) | 0.31" |
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Mag pri | 8.03 |
Mag sec | 8.72 |
delta mag (ΔM) | 0.69 |
Spectral class | G9V (yellow) |
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Pri motion ra | -044 |
Sec motion ra | |||||||||
Pri motion dec | +293 |
Sec motion dec | |||||||||
Notes |
Precise pa | 132.8 |
Precise sep | 0.286 |
Constellation | Cygnus |
SAO | 48968 |
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HIP | 98001 |
Tycho2 | 3145-00504-1 |
Gaia DR2 | 56940805248 |
HD | 188753 |
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ADS | 13125 |
BD | BD+41 3535 |
Distance | 46.23 |
Distance ly | 150.8 |
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last precise pa | 132.8 |
last precise sep | 0.286 |
Period (P) | 25.63y | ± 0.04 | Periastron (T) | 1988.1y | ± 0.1 | Semi-major axis (a) | 258.7m | ± 2.8 |
Eccentricity (e) | 0.502 | ± 0.008 | Inclination (i) | 31.1° | ± 1.5 | Longitude of periastron (ω) | 233.8° | ± 1.3 |
Node (Ω) | 45.7° | ± 1.1 | Note | Grade | 1 | (1=Definitive, 9=Indet.) | ||
Equinox | 2000 | Last observation | 2006 |
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 |
19550+4152 | HO 581 | 2003 | 121 | 111 | 0.3 | 8.03 | 8.72 | G9V | NOD | 195458.41+415215.0 | |
19550+4152 | HO 581 | 2006 | 122 | 133 | 0.3 | 8.03 | 8.72 | G9V | NOD | 195458.41+415215.0 |