Iota1 Cygni

For other stars with this Bayer designation, see ι Cygni.
Iota1 Cygni
Observation data
Epoch J2000      Equinox J2000
Constellation Cygnus
Right ascension 19h 27m 25.96022s[1]
Declination 52° 19′ 13.5871″[1]
Apparent magnitude (V) 5.73[2]
Characteristics
Evolutionary stage main sequence[3]
Spectral type A1V[4]
B−V color index −0.002±0.002[2]
Astrometry
Radial velocity (Rv)+1.90[5] km/s
Proper motion (μ) RA: -12.639[1] mas/yr
Dec.: -27.567[1] mas/yr
Parallax (π)8.4332 ± 0.0867 mas[1]
Distance387 ± 4 ly
(119 ± 1 pc)
Absolute magnitude (MV)+0.57[2]
Details
Mass2.59±0.03[3] M☉
Luminosity74.1+11.0
−20.5[6] L☉
Surface gravity (log g)4.18[6] cgs
Temperature9,683+89
−178[3] K
Rotational velocity (v sin i)51.6±2.2[6] km/s
Age404[7] Myr
Other designations
ι1 Cyg, 7 Cygni, BD+52° 2434, HD 183534, HIP 95656, HR 7408, SAO 31673[8]
Database references
SIMBADdata

Iota1 Cygni, Latinized from ι1 Cygni, is a probable binary star[6] system in the northern constellation Cygnus, and is separated by less than a degree from its brighter visual neighbor, Iota2 Cygni.[9] It is near the lower limit of visibility to the naked eye with an apparent visual magnitude of 5.75.[8] The system is located approximately 387 light years away based on parallax,[1] and it is drifting further away with a radial velocity of +2 km/s.[5]

This is a candidate double-lined spectroscopic binary system.[6] It has a stellar classification of A1V,[4] suggesting the primary component is an A-type main-sequence star. The star is about 400[7] million years old with a moderate rotation rate, showing a projected rotational velocity of 52 km/s.[6] It has 2.6[3] times the mass of the Sun and is radiating 74[6] times the Sun's luminosity from its photosphere at an effective temperature of 9,683 K.[3]

  1. ^ a b c d e f Cite error: The named reference GaiaDR2 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Anderson2012 was invoked but never defined (see the help page).
  3. ^ a b c d e Cite error: The named reference zorec2012 was invoked but never defined (see the help page).
  4. ^ a b Cite error: The named reference Jaschek1978 was invoked but never defined (see the help page).
  5. ^ a b Cite error: The named reference Evans1967 was invoked but never defined (see the help page).
  6. ^ a b c d e f g Cite error: The named reference Royer2014 was invoked but never defined (see the help page).
  7. ^ a b Cite error: The named reference Gontcharov2012 was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference Kaler2015 was invoked but never defined (see the help page).