ι Phoenicis, Latinized as Iota Phoenicis, is a binary star[9] system in the southern constellation of Phoenix, near the constellation border with Grus. It is visible to the naked eye as a faint, white-hued star with an apparent visual magnitude that fluctuates around 4.71.[2] This system lies approximately 254 light years from the Sun based on parallax, and it is drifting further away with a radial velocity of +19.4 km/s.[4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Phoenix |
Right ascension | 23h 35m 04.57082s[1] |
Declination | −42° 36′ 54.5409″[1] |
Apparent magnitude (V) | 4.71[2] (4.70 - 4.75)[3] |
Characteristics | |
Evolutionary stage | main sequence[3] |
Spectral type | A2VpSrCrEu[3] |
U−B color index | +0.07[2] |
B−V color index | +0.08[2] |
Variable type | α2 CVn[3] |
Astrometry | |
Radial velocity (Rv) | +19.4[4] km/s |
Proper motion (μ) | RA: +39.908[1] mas/yr Dec.: + 10.844[1] mas/yr |
Parallax (π) | 12.8425 ± 0.3922 mas[1] |
Distance | 254 ± 8 ly (78 ± 2 pc) |
Absolute magnitude (MV) | 0.28[5] |
Details | |
Mass | 2.23[6] M☉ |
Radius | 5.07+0.51 −0.42[1] R☉ |
Luminosity | 68.2±3.3[1] L☉ |
Surface gravity (log g) | 3.89[6] cgs |
Temperature | 7,370+320 −350[1] K |
Metallicity [Fe/H] | -0.01[7] dex |
Rotational velocity (v sin i) | 23[6] km/s |
Age | 573[6] Myr |
Other designations | |
Database references | |
SIMBAD | data |
The primary component is an Ap star on the main sequence with a stellar classification of A2VpSrCrEu,[3] where the suffix notation indicates abnormal abundances of strontium, chromium, and europium in the stellar atmosphere. It is an Alpha2 Canum Venaticorum variable; its apparent magnitude varies from 4.70 down to 4.75 with a period of 12.5 days.[3] A rotationally-modulated magnetic field has been measured, varying from −72±9 G to 57±9 G. It has an estimated rotation period of 5.98±0.06 d, although this is in need of further confirmation.[11]
The proper motion companion[12] is a magnitude 12.8 star at an angular separation of 6.7″.[9]
References
Wikiwand in your browser!
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.