Coord 2000 | 19394+3009 |
Discov num | MCA 57 |
Comp | Coord arcsec 2000 | 19 39 22.60 +30 09 11.6 |
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Date first | 1978 |
Date last | 1994 |
Obs | 52 |
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Pa first | 81 |
Pa last | 247 |
P.A. Now (θ) | 247° |
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Sep first | 0.0 |
Sep last | 0.0 |
Sep. Now (ρ) | 0" |
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Mag pri | 4.90 |
Mag sec | 5.10 |
delta mag (ΔM) | 0.2 |
Spectral class | G8III-IV (yellow) |
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Pri motion ra | +004 |
Sec motion ra | |||||||||
Pri motion dec | +037 |
Sec motion dec | |||||||||
Notes |
Precise pa | 246.8 |
Precise sep | 0.03 |
Name | Phi Cyg |
Constellation | Cygnus |
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SAO | 68637 |
HIP | 96683 |
Tycho2 | 2656-05248-1 |
Gaia DR2 | 78261396736 |
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HD | 185734 |
HR | 7478 |
GC | 27203 |
BD | BD+29 3684 |
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Bayer | Phi Cygni |
Bayer name | Phi Cyg |
Flamsteed | 12 Cygni |
Flamsteed name | 12 Cyg |
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Distance | 81.63 |
Distance ly | 266.28 |
last precise pa | 246.8 |
last precise sep | 0.03 |
Period (P) | 434.171d | ± 0.015 | Periastron (T) | 28230.76d (1936.169y) | ± 0.62 | Semi-major axis (a) | 26.9m | ± 0.75 |
Eccentricity (e) | 0.542 | ± 0.0063 | Inclination (i) | 80.8° | ± 0.63 | Longitude of periastron (ω) | 34° | ± 1.3 |
Node (Ω) | 251° | ± 0.86 | Note | Grade | 1 | (1=Definitive, 9=Indet.) | ||
Equinox | 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 |
19394+3009 | MCA 57 | 1994 | 52 | 67 | 0.0 | 4.70 | G8III-IV | NO | 193922.60+300911.6 |