Zeta Indi

Zeta Indi
Location of ζ Indi (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Indus
Right ascension 20h 49m 28.96165s[1]
Declination −46° 13′ 36.6083″[1]
Apparent magnitude (V) 4.90[2]
Characteristics
Evolutionary stage giant
Spectral type K5III[3]
B−V color index +1.494±0.059[2]
Astrometry
Radial velocity (Rv)−5.20±2.8[4][2] km/s
Proper motion (μ) RA: +40.050[1] mas/yr
Dec.: +28.199[1] mas/yr
Parallax (π)7.5666 ± 0.2153 mas[1]
Distance430 ± 10 ly
(132 ± 4 pc)
Absolute magnitude (MV)−0.61[2]
Details
Radius44.79+0.86
−5.47[1] R☉
Luminosity446±14[1] L☉
Surface gravity (log g)1.93[5] cgs
Temperature3,963+267
−37[1] K
Other designations
ζ Ind, CD−46°13718, FK5 3661, GC 29008, HD 198048, HIP 102790, HR 7952, SAO 230391[6]
Database references
SIMBADdata

Zeta Indi is a single[7] star in the southern constellation Indus, near the northern constellation border with Microscopium. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.90.[2] The star is located approximately 430 light years away from the Sun based on parallax.[1] The radial velocity estimate for this object is poorly constrained, but it appears to be moving closer at the rate of around −5 km/s.[2]

This object is an aging giant star with a stellar classification of K5III.[3] With the supply of hydrogen at its core exhausted, the star has expanded off the main sequence and now has 45[1] times the girth of the Sun. It is radiating 446[1] times the luminosity of the Sun from its bloated photosphere at an effective temperature of 3,963 K.[1]

  1. ^ a b c d e f g h i j k l Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference XHIP was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference Houk1978 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Wilson1953 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Bordé2002 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 Eggleton2008 was invoked but never defined (see the help page).