Iota Virginis

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ι Virginis
Virgo IAU.svg
Cercle rouge 100%.svg

Location of ι Virginis.
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Virgo
Right ascension 14h 16m 00.9s
Declination −6° 00′ 02″
Apparent magnitude (V) +4.07[1]
Absolute magnitude (V) +2.44[2]
Distance 69.8 ± 1.3 ly
(21.4 ± 0.4 pc)
Spectral type F6 III[citation needed]
Other designations
Syrma, 99 Virginis, BD-05 3843, FK5 525, HD 124850, HIP 69701, HR 5338, SAO 139824, Wo 9473.

Iota Virginis (ι Vir, ι Virginis) is a star in the constellation Virgo. It has the traditional name Syrma.[citation needed]

Syrma is a yellow star of apparent magnitude 4.08 and spectral class F6 III about 70 light years from Earth. This star has 1.52 times the mass of the Sun,[3] with a projected rotational velocity of 14.8 km s−1.[2] It is radiating 8.6 times the luminosity of the Sun from its outer atmosphere at an effective temperature of 6,282 K.[1] The radius is about 2.5 times that of the Sun.[4]

In culture[edit]

The name Syrma is from the Arabic (سرما (تطريز sirmā "train" (of a garment).

USS Syrma (AK-134) was a United States Navy Crater class cargo ship named after the star.


  1. ^ a b Mallik, Sushma V. (December 1999), "Lithium abundance and mass", Astronomy and Astrophysics 352: 495–507, Bibcode:1999A&A...352..495M 
  2. ^ a b Pizzolato, N.; Maggio, A.; Sciortino, S. (September 2000), "Evolution of X-ray activity of 1-3 Msun late-type stars in early post-main-sequence phases", Astronomy and Astrophysics 361: 614–628, Bibcode:2000A&A...361..614P 
  3. ^ Shaya, Ed J.; Olling, Rob P. (January 2011), "Very Wide Binaries and Other Comoving Stellar Companions: A Bayesian Analysis of the Hipparcos Catalogue", The Astrophysical Journal Supplement 192 (1): 2, arXiv:1007.0425, Bibcode:2011ApJS..192....2S, doi:10.1088/0067-0049/192/1/2 
  4. ^ Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars", Astronomy and Astrophysics Supplement Series 85 (3): 1015–1019, Bibcode:1990A&AS...85.1015M 

External links[edit]