IZ Aquarii

IZ Aquarii

A light curve for IZ Aquarii, plotted from Hipparcos data[1]
Observation data
Epoch J2000      Equinox J2000
Constellation Aquarius
Right ascension 21h 34m 42.768123s[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 (Rv)−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 mas[2]
Distance940 ± 70 ly
(290 ± 20 pc)
Absolute magnitude (MV)−0.75[3]
Details[3]
Radius44.4 R☉
Luminosity390.92 L☉
Temperature3303 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[6]
Database references
SIMBADdata

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] It is can be seen by the naked eye as a very faint star by an observer at an excellent dark-sky location.

The star's variability was first detected in the Hipparcos satellite data, and it was given its variable star designation in 1999.[7]

  1. ^ Cite error: The named reference CDS was invoked but never defined (see the help page).
  2. ^ a b c d e Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference AAVSOIZ was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Houk1999 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Kazarovets was invoked but never defined (see the help page).