Iota1 Normae

For other star systems with this Bayer designation, see ι Normae.
ι1 Normae
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Norma
Right ascension 16h 03m 32.08942s [1]
Declination −57° 46 30.2641 [1]
Apparent magnitude (V) 4.63[1]
Characteristics
Spectral type A7IV
Astrometry
Radial velocity (Rv)−14.40 ± 3.7[1] km/s
Proper motion (μ) RA: -120.01 ± 1.77[2] mas/yr
Dec.: -82.09 ± 1.48[2] mas/yr
Parallax (π)25.39 ± 1.25[2] mas
Distance128 ± 6 ly
(39 ± 2 pc)
Other designations
HR 5961, HD 143474, HIP 78662[1]

Iota1 Normae (ι1 Nor) is a multiple star system in the constellation Norma. Its combined apparent magnitude is 4.63. The AB (mag 5.2 and 5.76) pair orbit each other with a period of 26.9 years; they are 2.77 and 2.71 times as massive as the Sun respectively. A third component is a yellow main sequence star of spectral type G8V with an apparent magnitude of 8.02.[3]

References

  1. 1 2 3 4 5 SIMBAD, HR 5961 (accessed 22 December 2012)
  2. 1 2 3 van Leeuwen, F. (2007). "Validation of the New Hipparcos Reduction". Astronomy and Astrophysics. 474 (2): 653–64. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
  3. Malkov, O. Yu.; Tamazian, V.S.; Docobo, J.A.; Chulkov, D.A. (2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: 5. Bibcode:2012A&A...546A..69M. doi:10.1051/0004-6361/201219774. A69.


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