Cannabaceae

thcscience_admin
η3 Fornacis
Location of η3 Fornacis (top star inside circle)
Observation data
Epoch J2000.0      Equinox J2000.0 (ICRS)
Constellation Fornax
Right ascension 02h 50m 40.407s[1]
Declination −35° 40′ 33.06″[1]
Apparent magnitude (V) 5.47[2]
Characteristics
Evolutionary stage giant
Spectral type K2III[3]
U−B color index +1.31[2]
B−V color index +1.25[2]
Astrometry
Radial velocity (Rv)13.10±0.12[1] km/s
Proper motion (μ) RA: +4.093[1] mas/yr
Dec.: −54.551[1] mas/yr
Parallax (π)6.6631 ± 0.0580 mas[1]
Distance489 ± 4 ly
(150 ± 1 pc)
Absolute magnitude (MV)−0.26[4]
Details
Mass3.7[1] M☉
Radius21.9[1] R☉
Luminosity249[1] L☉
Surface gravity (log g)2.27[1] cgs
Temperature4,717[1] K
Metallicity [Fe/H]0.156[1] dex
Rotational velocity (v sin i)<1[5] km/s
Age217[1] Myr
Other designations
η3 For, CD−36°1070, HD 17829, HIP 13265, HR 848, SAO 193944[6]
Database references
SIMBADdata

Eta3 Fornacis (η3 Fornacis) is an orange giant in the constellation of Fornax. The star has a spectral type of K2III and an apparent magnitude of 5.47.[7] The star is visually close to, but unrelated with the similar stars η2 Fornacis and η1 Fornacis.[7] The star is located at approximately 489 light years away with a luminosity of about 249 L☉, and is a suspected binary system with the primary being the orange giant.[8]

References

[edit]
  1. ^ a b c d e f g h i j k l m Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
  2. ^ a b c Hoffleit, D.; Warren, Jr., W. H. (1991). The Bright Star Catalogue (5th Revised ed.). New Haven: Astronomical Data Center, NSSDC/ADC. Bibcode:1964cbs..book.....H.
  3. ^ Houk, Nancy; Smith-Moore, M. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
  4. ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
  5. ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
  6. ^ "* eta03 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-09-28.
  7. ^ a b "η3 Fornacis (eta3 Fornacis)". The Sky Live. Retrieved 28 September 2023.
  8. ^ "Eta3 Fornacis Star Facts (Distance, Colour etc.)". Universe Guide. Retrieved 28 September 2023.
source: https://en.wikipedia.org/wiki/Eta3_Fornacis

One thought on “Cannabaceae”

  1. Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
    View the detailed Guide of Psilotum nudum: Detailed Study Of Psilotum Nudum (Whisk Fern), Classification, Anatomy, Reproduction

Leave a Reply