| Coord 2000 | 20329+4154 |
Discov num | BLA 8 |
Comp | Coord arcsec 2000 | 20 32 51.64 +41 53 54.5 |
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| Date first | 1986 |
Date last | 2014 |
Obs | 5 |
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| Pa first | 167 |
Pa last | 336 |
P.A. Now (θ) | 336° |
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| Sep first | 0.0 |
Sep last | 0.0 |
Sep. Now (ρ) | 0" |
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| Mag pri | 7.40 |
Mag sec | 9.10 |
delta mag (ΔM) | 1.7 |
Spectral class | G9V (yellow) |
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| Pri motion ra | -153 |
Sec motion ra | |||||||||
| Pri motion dec | +457 |
Sec motion dec | |||||||||
| Notes | |||||||||||
| Precise pa | 336.3 |
Precise sep | 0.013 |
Constellation | Cygnus |
SAO | 49769 |
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| HIP | 101382 |
Tycho2 | 3161-00779-1 |
HD | 195987 |
GL | Gl 793.1 |
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| BD | BD+41 3799 |
Distance | 22.05 |
Distance ly | 71.93 |
last precise pa | 336.3 |
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| last precise sep | 0.013 |
| Period (P) | 57.322d | ± 0.0002 | Periastron (T) | 51353.81d (1999.478y) | ± 0.04 | Semi-major axis (a) | 15.2m | ± 0.3 |
| Eccentricity (e) | 0.306 | ± 0.001 | Inclination (i) | 100° | ± 6.3 | Longitude of periastron (ω) | 357.4° | ± 0.3 |
| Node (Ω) | 330.9° | ± 3.6 | Note | Grade | 5 | (1=Definitive, 9=Indet.) | ||
| Equinox | 2000 | Last observation | 1991 |
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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 |
| 20329+4154 | BLA 8 | 1986 | 1 | 170 | 0.0 | 7.09 | G9V | NO | 203251.64+415354.5 | ||
| 20329+4154 | BLA 8 | 2007 | 2 | 296 | 0.0 | 7.09 | G9V | NOD | 203251.64+415354.5 | ||
| 20329+4154 | BLA 8 | 2014 | 5 | 336 | 0.0 | 7.40 | 9.10 | G9V | NO | 203251.64+415354.5 |