IZ Aquarii

IZ Aquarii
Observation data; Epoch J2000 Equinox J2000
Constellation	Aquarius
Right ascension	21h 34m 42.768123s
Declination	+01° 49′ 44.95678″
Apparent magnitude (V)	6.41 (6.23 - 6.47)
Characteristics
Spectral type	M4 III
B−V color index	1.398±0.015
Variable type	irregular variable
Astrometry
Radial velocity (Rv)	−20.48±0.26 km/s
Proper motion (μ)	RA: +13.153 mas/yr ; Dec.: −8.518 mas/yr
Parallax (π)	3.4739 ± 0.2458 mas
Distance	940 ± 70 ly ; (290 ± 20 pc)
Absolute magnitude (MV)	−0.75
Details
Radius	44.4 R☉
Luminosity	390.92 L☉
Temperature	3303 K
Other designations
	IZ Aqr, AG+01° 2614, BD+01° 4503, FK5 5868, GC 30209, HD 205358, HIP 106544, SAO 126901, PPM 171943, TYC 542-105-1, GSC 00542-00105, IRAS 21321+0136, 2MASS J21344276+0149447
Database references
SIMBAD	data

IZ Aquarii is a red giant star in the constellation Aquarius. It is a slow irregular variable that varies between magnitudes 6.23 and 6.47.^[3]

References[]

^ ^a ^b ^c ^d ^e Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
^ ^a ^b ^c ^d ^e Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
^ ^a ^b Watson, Christopher (4 January 2010). "IZ Aquarii". The International Variable Star Index. American Association of Variable Star Observers. Retrieved 13 July 2015.
^ Houk, N.; Swift, C. (1999). "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5". Michigan Spectral Survey. 05: 0. Bibcode:1999MSS...C05....0H.
^ "HD 205358". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 20 August 2018.

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Observation data Epoch J2000 Equinox J2000
Constellation	Aquarius
Right ascension	21^h 34^m 42.768123^s^[1]
Declination	+01° 49′ 44.95678″^[1]
Apparent magnitude (V)	6.41^[2] (6.23 - 6.47)^[3]
Characteristics
Spectral type	M4 III^[4]
B−V color index	1.398±0.015^[2]
Variable type	irregular variable
Astrometry

Radial velocity (R_v)	−20.48±0.26^[2] km/s
Proper motion (μ)	RA: +13.153^[1] mas/yr Dec.: −8.518^[1] mas/yr
Parallax (π)	3.4739 ± 0.2458^[1] mas
Distance	940 ± 70 ly (290 ± 20 pc)
Absolute magnitude (M_V)	−0.75^[2]

Details^[2]

Radius	44.4 `R`_☉
Luminosity	390.92 `L`_☉
Temperature	3303 K

Other designations
IZ Aqr, AG+01° 2614, BD+01° 4503, FK5 5868, GC 30209, HD 205358, HIP 106544, SAO 126901, PPM 171943, TYC 542-105-1, GSC 00542-00105, IRAS 21321+0136, 2MASS J21344276+0149447^[5]
Database references
SIMBAD	data