Iota² Cygni

Iota² Cygni
Observation data; Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19h 29m 42.36s
Declination	+51° 43′ 47.2″
Apparent magnitude (V)	3.77
Characteristics
Spectral type	A5V
B−V color index	+0.15
Astrometry
Radial velocity (Rv)	-19.50 km/s
Proper motion (μ)	RA: +20.59 mas/yr; Dec.: +128.33 mas/yr
Parallax (π)	26.88 ± 0.11 mas
Distance	121.3 ± 0.5 ly; (37.2 ± 0.2 pc)
Absolute magnitude (MV)	0.92
Details
Radius	1.90 R☉
Other designations
	10 Cygni, FK5 733, GC 26947, HIP 95853, HR 7420, HD 184006, SAO 31702
Database references
SIMBAD	data

Iota² Cygni (ι² Cyg, often simply called ι Cyg^[7]) is a star in the constellation Cygnus. Its apparent magnitude is 3.77^[2] Located around 37.20 parsecs (121.3 ly) distant,^[1] it is a blue-white main-sequence star of spectral type A5V,^[3] a star that is currently fusing its core hydrogen. Based on rapid changes in the strength of a signly-ionized calcium absorption line, the star is likely host to a circumstellar disk.^[8]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 Lua error in package.lua at line 80: module 'strict' not found.
↑ ^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.
↑ 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.
↑ Lua error in package.lua at line 80: module 'strict' not found.

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Observation data Epoch J2000 Equinox J2000
Constellation	Cygnus
Right ascension	19^h 29^m 42.36^s^[1]
Declination	+51° 43′ 47.2″^[1]
Apparent magnitude (V)	3.77^[2]
Characteristics
Spectral type	A5V^[3]
B−V color index	+0.15 ^[2]
Astrometry

Radial velocity (R_v)	-19.50^[4] km/s
Proper motion (μ)	RA: +20.59^[2] mas/yr Dec.: +128.33^[2] mas/yr
Parallax (π)	26.88 ± 0.11^[1] mas
Distance	121.3 ± 0.5 ly (37.2 ± 0.2 pc)
Absolute magnitude (M_V)	0.92 ^[5]

Details

Radius	1.90 ^[6] R_☉

Other designations
10 Cygni, FK5 733, GC 26947, HIP 95853, HR 7420, HD 184006, SAO 31702 ^[2]
Database references
SIMBAD	data