Phi Cygni

Phi Cygni
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 39m 22.60591s
Declination	30° 09′ 11.9604″
Apparent magnitude (V)	4.69
Characteristics
Spectral type	G8III-IV
B−V color index	+0.96
Astrometry
Radial velocity (Rv)	+4.50 km/s
Proper motion (μ)	RA: +2.48 mas/yr; Dec.: +36.50 mas/yr
Parallax (π)	12.25 ± 0.24 mas
Distance	266 ± 5 ly; (82 ± 2 pc)
Absolute magnitude (MV)	0.13
Details
Radius	7.80 R☉
Other designations
	12 Cygni, FK5 3570, GC 27203, HIP 96683, HR 7478, HD 185734, SAO 68637, WDS J19394+3009AB
Database references
SIMBAD	data

Phi Cygni (φ Cyg) is a class G8III^[3] (yellow giant) star in the constellation Cygnus. Its apparent magnitude is 4.69^[2] and it is approximately 266 light years away based on parallax.^[1] It is a spectroscopic binary with two similar stars orbiting with a period of 434 days.^[7]^[8]

References

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↑ ^1.0 ^1.1 ^1.2 ^1.3 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Lua error in package.lua at line 80: module 'strict' not found.
↑ ^3.0 ^3.1 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
↑ Lua error in package.lua at line 80: module 'strict' not found.
↑ Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$ , where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.
↑ Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
↑ Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry
↑ Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

[vanLeeuwen2007-1] 1.0 ^1.1 ^1.2 ^1.3 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

[SIMBAD-2] 2.0 ^2.1 ^2.2 ^2.3 ^2.4 ^2.5 Lua error in package.lua at line 80: module 'strict' not found.

[Jaschek1978-3] 3.0 ^3.1 Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

[Pourbaiz2004-4] Lua error in package.lua at line 80: module 'strict' not found.

[5] Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$ , where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ is the star's measured parallax in arcseconds.

[Cadars-6] Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

[Malkov2012-7] Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

[Eggleton2008-8] Lua error in package.lua at line 80: module 'strict' not found. Vizier catalog entry

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Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19^h 39^m 22.60591^s ^[1]
Declination	30° 09′ 11.9604″ ^[1]
Apparent magnitude (V)	4.69 ^[2]
Characteristics
Spectral type	G8III-IV ^[3]
B−V color index	+0.96 ^[2]
Astrometry

Radial velocity (R_v)	+4.50^[4] km/s
Proper motion (μ)	RA: +2.48^[2] mas/yr Dec.: +36.50^[2] mas/yr
Parallax (π)	12.25 ± 0.24^[1] mas
Distance	266 ± 5 ly (82 ± 2 pc)
Absolute magnitude (M_V)	0.13 ^[5]

Details

Radius	7.80 ^[6] R_☉

Other designations
12 Cygni, FK5 3570, GC 27203, HIP 96683, HR 7478, HD 185734, SAO 68637, WDS J19394+3009AB ^[2]
Database references
SIMBAD	data

Phi Cygni

References

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