Astronomy:IZ Aquarii

IZ Aquarii
	; A light curve for IZ Aquarii, plotted from Hipparcos data
Observation data; Equinox J2000.0]] (ICRS)
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, 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

Short description: Star in the constellation Aquarius

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.^[4]

References

↑ "/ftp/cats/more/HIP/cdroms/cats". Strasbourg astronomical Data Center. https://cdsarc.cds.unistra.fr/viz-bin/ftp-index?/ftp/cats/more/HIP/cdroms/cats.
↑ ^2.0 ^2.1 ^2.2 ^2.3 ^2.4 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G.
↑ ^3.0 ^3.1 ^3.2 ^3.3 ^3.4 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A.
↑ ^4.0 ^4.1 Watson, Christopher (4 January 2010). "IZ Aquarii". The International Variable Star Index. American Association of Variable Star Observers. http://www.aavso.org/vsx/index.php?view=detail.top&oid=1088.
↑ 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. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+205358.

0.00

(0 votes)

Original source: https://en.wikipedia.org/wiki/IZ Aquarii. Read more

Observation data Equinox J2000.0]] (ICRS)
A light curve for IZ Aquarii, plotted from Hipparcos data^[1]
Constellation	Aquarius
Right ascension	21^h 34^m 42.768123^s^[2]
Declination	+01° 49′ 44.95678″^[2]
Apparent magnitude (V)	6.41^[3] (6.23 - 6.47)^[4]
Characteristics
Spectral type	M4 III^[5]
B−V color index	1.398±0.015^[3]
Variable type	irregular variable
Astrometry

Radial velocity (R_v)	−20.48±0.26^[3] km/s
Proper motion (μ)	RA: +13.153^[2] mas/yr Dec.: −8.518^[2] mas/yr
Parallax (π)	3.4739 ± 0.2458^[2] mas
Distance	940 ± 70 ly (290 ± 20 pc)
Absolute magnitude (M_V)	−0.75^[3]

Details^[3]

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

Other designations
IZ Aqr, 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^[6]
Database references
SIMBAD	data