Iota Coronae Borealis

Iota Coronae Borealis
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Corona Borealis
Right ascension 16h 01m 26.56488s[1]
Declination +29° 51′ 03.8243″[1]
Apparent magnitude (V) 4.96[2]
Characteristics
Spectral type A0 IIIp(HgMnEu)s[3]
U−B color index −0.15[2]
B−V color index −0.06[2]
Astrometry
Radial velocity (Rv)−20.8±0.4[4] km/s
Proper motion (μ) RA: −38.31[1] mas/yr
Dec.: −6.56[1] mas/yr
Parallax (π)10.46 ± 0.24 mas[1]
Distance312 ± 7 ly
(96 ± 2 pc)
Absolute magnitude (MV)+0.08[5]
Orbit[6]
Period (P)35.474 d
Eccentricity (e)0.56
Periastron epoch (T)2441566.96 JD
Argument of periastron (ω)
(secondary)		156°
Semi-amplitude (K1)
(primary)		2.3 km/s
Details
ι CrB A
Luminosity90[7] L☉
Surface gravity (log g)3.84±0.16[8] cgs
Temperature10,727±278[8] K
Metallicity [Fe/H]−0.01±0.12[8] dex
Rotational velocity (v sin i)18[9] km/s
Other designations
ι CrB, 14 CrB, BD+30°2738, HD 143807, HIP 78493, HR 5971, SAO 84152[10]
Database references
SIMBADdata

Iota Coronae Borealis, Latinized from ι Coronae Borealis, is a binary star[6] system in the constellation Corona Borealis. It is visible to the naked eye with a combined apparent visual magnitude of is 4.96.[2] Based upon an annual parallax shift of 10.46 mas as seen from the Earth,[1] it is located about 312 light years from the Sun.

This is a single-lined spectroscopic binary with an orbital period of 35.5 days and an eccentricity of 0.56.[6] The visible member, component A, has a stellar classification of A0 IIIp(HgMnEu)s,[3] indicating it is a chemically peculiar mercury-manganese star with narrow absorption lines. The secondary member, component B, appears to be an A-type star.[11]

  1. ^ a b c d e f Cite error: The named reference vanLeeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Fernie1983 was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference abt1995 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference deBruijne2012 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Pourbaix2004 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Mcdonald2012 was invoked but never defined (see the help page).
  8. ^ a b c Cite error: The named reference Prugniel2011 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Royer2002 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Dubaj2005 was invoked but never defined (see the help page).