Iota Andromedae

This article is about the star. For the galaxy, see Andromeda I. For another star, see 1 Andromedae.
"ι And" redirects here. For other uses, see And I (disambiguation).
Iota Andromedae
Location of ι Andromedae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Andromeda
Right ascension 23h 38m 08.20130s[1]
Declination +43° 16′ 05.0649″[1]
Apparent magnitude (V) +4.29[2]
Characteristics
Evolutionary stage main sequence
Spectral type B8 V[3][4]
U−B color index –0.29[5]
B−V color index –0.11[5]
Variable type constant[6]
Astrometry
Radial velocity (Rv)–0.5[2] km/s
Proper motion (μ) RA: +27.64[1] mas/yr
Dec.: -1.02[1] mas/yr
Parallax (π)6.53 ± 0.16 mas[1]
Distance500 ± 10 ly
(153 ± 4 pc)
Absolute magnitude (MV)−1.63[7]
Details
Mass3.1 M☉[4]
3.98±0.06[8] M☉
Radius4.6[9] R☉
Luminosity638[7] L☉
Surface gravity (log g)3.35[6] cgs
Temperature12,620[10] K
Metallicity [Fe/H]−0.19±0.14[6] dex
Rotational velocity (v sin i)70[11] km/s
Age116[4] Myr
Other designations
ι And, 17 And, BD+42°4720, FK5 891, HD 222173, HIP 116631, HR 8965, SAO 53216, PPM 64473[12]
Database references
SIMBADdata

Iota Andromedae is a single[13] star in the northern constellation of Andromeda. It has the Flamsteed designation 17 Andromedae, while Iota Andromedae is the Bayer designation as Latinized from ι Andromedae. This object is visible to the naked eye at night as a faint, blue-white hued star with an apparent visual magnitude of +4.29.[2] Based upon parallax measurements, it is located approximately 500 light years distant from the Sun.[1]

This object is a B-type main-sequence star with a stellar classification of B8 V. It is among the least variable stars observed during the Hipparcos mission.[6] The star is 116[4] million years old with 3.1[4] times the mass of the Sun and is spinning with a projected rotational velocity of 70 km/s.[11] It is radiating 638[7] times the luminosity of the Sun from its photosphere at an effective temperature of 12,620 K.[10] The star is somewhat metal-poor, although the abundance of helium is close to solar. The latter excludes it from membership among the class of peculiar stars.[6] Iota Andromedae is a debris disk candidate, showing an infrared excess at a wavelength of 18 μm.[14]

  1. ^ a b c d e f Cite error: The named reference aaa474_2_653 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference scfs was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Crawford1958 was invoked but never defined (see the help page).
  4. ^ a b c d e Cite error: The named reference Gullikson2016 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference clpl4_99 was invoked but never defined (see the help page).
  6. ^ a b c d e Cite error: The named reference aaa406_975 was invoked but never defined (see the help page).
  7. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Zorec_Royer_2012 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Underhill_et_al_1979 was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference aaa501_1_297 was invoked but never defined (see the help page).
  11. ^ a b Cite error: The named reference apj573_1_359 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 Ishihara2017 was invoked but never defined (see the help page).