Iota Telescopii

ι Telescopii
Location of Iota Telescopii (circled)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Telescopium
Right ascension 19h 35m 12.98634s[1]
Declination −48° 05′ 57.1238″[1]
Apparent magnitude (V) 4.88±0.01[2]
Characteristics
Spectral type K0 III[3]
B−V color index +1.09[4]
Astrometry
Radial velocity (Rv)+22.3±0.8[5] km/s
Proper motion (μ) RA: −8.190 mas/yr[1]
Dec.: −36.977 mas/yr[1]
Parallax (π)8.6546 ± 0.1055 mas[1]
Distance377 ± 5 ly
(116 ± 1 pc)
Absolute magnitude (MV)−0.39[6]
Details
Mass2.53±0.19[7] M☉
Radius19.7±1.0[8] R☉
Luminosity172+5
−4[1] L☉
Surface gravity (log g)1.88[9] cgs
Temperature4,738±55[7] K
Metallicity [Fe/H]+0.01±0.04[7] dex
Rotational velocity (v sin i)1.8±1.3[10] km/s
Other designations
ι Tel, 64 G. Telescopii[11], CD−48° 13161, CPD−48°10202, FK5 735, GC 27025, HD 184127, HIP 96341, HR 7424, SAO 229751[12]
Database references
SIMBADdata

ι Telescopii, Latinized as Iota Telescopii and abbreviated Iota Tel, is a solitary star[13] located in the southern constellation Telescopium. It is faintly visible to the naked eye as an orange-hued star with an apparent visual magnitude of +4.88.[2] The star is located roughly 377 light years distant from the Solar System based on Gaia DR3 parallax measurements[1] and it is receding with a radial velocity of 22.3 km/s.[5] At its current distance, Iota Tel's brightness is diminished by 0.19 magnitudes[14] due to interstellar dust and it has an absolute magnitude of −0.39.[6]

This object is an aging red giant star with a stellar classification of K0 III.[3] At present it has 2.53 times the mass of the Sun,[7] but it has expanded to 19.7 times the radius of the Sun.[8] It is radiating 172 times the Sun's luminosity[1] from its swollen photosphere at an effective temperature of 4,738 K.[7] Iota Tel has a near solar metallicity at [Fe/H] = +0.01[7] and it spins slowly with a projected rotational velocity of 1.8 km/s.[10]

  1. ^ a b c d e f g Cite error: The named reference GaiaDR3 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Tycho2000 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 Cousins1966 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  7. ^ a b c d e f Cite error: The named reference Ottoni2022 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference Kervella2004 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference McDonald2017 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference De Medeiros2014 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Gould1879 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  14. ^ Cite error: The named reference Gontcharov2017 was invoked but never defined (see the help page).