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HD 23474
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Mensa
Right ascension 03h 36m 30.1435s [1]
Declination −78° 19′ 23.0623″ [1]
Apparent magnitude (V) 6.30±0.01 [2]
Characteristics
Spectral type K2 III [3]
U−B color index +1.03 [4]
B−V color index +1.15 [4]
Astrometry
Radial velocity (Rv)2.4±0.4 [5] km/s
Proper motion (μ) RA: −14.12  mas/ yr [1]
Dec.: +6.67  mas/ yr [1]
Parallax (π)4.34 ± 0.36  mas [1]
Distance750 ± 60  ly
(230 ± 20  pc)
Absolute magnitude (MV)−0.50 [6]
Details
Mass1.21 [7]  M☉
Radius33.51±7.44 [8]  R☉
Luminosity227 [9]  L☉
Surface gravity (log g)1.22 [8]  cgs
Temperature4,556 [9]  K
Metallicity [Fe/H]−0.03 [7]  dex
Rotational velocity (v sin i)1.2±1.3 [10] km/s
Other designations
3 G. Mensae, CPD−78°105, FK5 2261, GC 4400, HD 23474, HIP 16827, HR 1154, SAO 256005, WDS J03365-7819AB [11] [12]
Database references
SIMBAD data

HD 23474 (HR 1154) is a double star [13] in the southern circumpolar constellation Mensa. It has an apparent magnitude of 6.30, placing it near the max naked eye visibility. The system is situated at a distance of about 750 light years and is currently receding with a heliocentric radial velocity of 2.4  km/s.

As of 2018, the pair have a separation of 0.2  arcseconds along a position angle of 92 °. [13]

The primary or visible component has a stellar classification of K2 III, indicating that it is a red giant. As a result, it has expanded to a diameter of 33.51  R☉ [8] and has an effective temperature of 4,556  K, [9] giving an orange hue. It has 121% the mass of the Sun and shines with a luminosity of 227  L☉ [9] from its enlarged photosphere. HD 23474 spins with a poorly constrained projected rotational velocity of 1.2  km/s [10] and has a metallicity around solar level. [7]

References

  1. ^ a b c d van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. eISSN  1432-0746. ISSN  0004-6361. Hipparcos record for this source at VizieR.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361.
  3. ^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode: 1975mcts.book.....H.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
  5. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. ISSN  1063-7737. S2CID  119231169.
  6. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. ISSN  1063-7737. S2CID  255204555.
  7. ^ a b c Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. ISSN  0004-6361.
  8. ^ a b c Stassun, Keivan G.; et al. (20 August 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv: 1706.00495. Bibcode: 2018AJ....156..102S. doi: 10.3847/1538-3881/aad050. eISSN  1538-3881.
  9. ^ a b c d McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037. Bibcode: 2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x. ISSN  0035-8711.
  10. ^ a b 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.
  11. ^ "HD 23474". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 14, 2022.
  12. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
  13. ^ a b Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920. ISSN  0004-6256.
Retrieved from " https://en.wikipedia.org/?title=HD_23474&oldid=1205370929"
From Wikipedia, the free encyclopedia
HD 23474
Observation data
Epoch J2000.0       Equinox J2000.0 ( ICRS)
Constellation Mensa
Right ascension 03h 36m 30.1435s [1]
Declination −78° 19′ 23.0623″ [1]
Apparent magnitude (V) 6.30±0.01 [2]
Characteristics
Spectral type K2 III [3]
U−B color index +1.03 [4]
B−V color index +1.15 [4]
Astrometry
Radial velocity (Rv)2.4±0.4 [5] km/s
Proper motion (μ) RA: −14.12  mas/ yr [1]
Dec.: +6.67  mas/ yr [1]
Parallax (π)4.34 ± 0.36  mas [1]
Distance750 ± 60  ly
(230 ± 20  pc)
Absolute magnitude (MV)−0.50 [6]
Details
Mass1.21 [7]  M☉
Radius33.51±7.44 [8]  R☉
Luminosity227 [9]  L☉
Surface gravity (log g)1.22 [8]  cgs
Temperature4,556 [9]  K
Metallicity [Fe/H]−0.03 [7]  dex
Rotational velocity (v sin i)1.2±1.3 [10] km/s
Other designations
3 G. Mensae, CPD−78°105, FK5 2261, GC 4400, HD 23474, HIP 16827, HR 1154, SAO 256005, WDS J03365-7819AB [11] [12]
Database references
SIMBAD data

HD 23474 (HR 1154) is a double star [13] in the southern circumpolar constellation Mensa. It has an apparent magnitude of 6.30, placing it near the max naked eye visibility. The system is situated at a distance of about 750 light years and is currently receding with a heliocentric radial velocity of 2.4  km/s.

As of 2018, the pair have a separation of 0.2  arcseconds along a position angle of 92 °. [13]

The primary or visible component has a stellar classification of K2 III, indicating that it is a red giant. As a result, it has expanded to a diameter of 33.51  R☉ [8] and has an effective temperature of 4,556  K, [9] giving an orange hue. It has 121% the mass of the Sun and shines with a luminosity of 227  L☉ [9] from its enlarged photosphere. HD 23474 spins with a poorly constrained projected rotational velocity of 1.2  km/s [10] and has a metallicity around solar level. [7]

References

  1. ^ a b c d van Leeuwen, Floor (13 August 2007). "Validation of the new Hipparcos reduction". Astronomy & Astrophysics. 474 (2): 653–664. arXiv: 0708.1752. Bibcode: 2007A&A...474..653V. doi: 10.1051/0004-6361:20078357. eISSN  1432-0746. ISSN  0004-6361. Hipparcos record for this source at VizieR.
  2. ^ Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27–L30. Bibcode: 2000A&A...355L..27H. ISSN  0004-6361.
  3. ^ Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Volume I. Declinations -90_ to -53_ƒ0. Bibcode: 1975mcts.book.....H.
  4. ^ a b Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99–110. Bibcode: 1966CoLPL...4...99J.
  5. ^ Gontcharov, G. A. (November 2006). "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system". Astronomy Letters. 32 (11): 759–771. arXiv: 1606.08053. Bibcode: 2006AstL...32..759G. doi: 10.1134/S1063773706110065. ISSN  1063-7737. S2CID  119231169.
  6. ^ Anderson, E.; Francis, Ch. (May 2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331–346. arXiv: 1108.4971. Bibcode: 2012AstL...38..331A. doi: 10.1134/S1063773712050015. ISSN  1063-7737. S2CID  255204555.
  7. ^ a b c Anders, F.; et al. (August 2019). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy & Astrophysics. 628: A94. arXiv: 1904.11302. Bibcode: 2019A&A...628A..94A. doi: 10.1051/0004-6361/201935765. ISSN  0004-6361.
  8. ^ a b c Stassun, Keivan G.; et al. (20 August 2018). "The TESS Input Catalog and Candidate Target List". The Astronomical Journal. 156 (3): 102. arXiv: 1706.00495. Bibcode: 2018AJ....156..102S. doi: 10.3847/1538-3881/aad050. eISSN  1538-3881.
  9. ^ a b c d McDonald, I.; Zijlstra, A. A.; Boyer, M. L. (21 November 2012). "Fundamental parameters and infrared excesses of Hipparcos stars: Parameters and IR excesses from Hipparcos". Monthly Notices of the Royal Astronomical Society. 427 (1): 343–357. arXiv: 1208.2037. Bibcode: 2012MNRAS.427..343M. doi: 10.1111/j.1365-2966.2012.21873.x. ISSN  0035-8711.
  10. ^ a b 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.
  11. ^ "HD 23474". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved June 14, 2022.
  12. ^ Gould, Benjamin Apthorp (1878). "Uranometria Argentina : brillantez y posicion de las estrellas fijas, hasta la septima magnitud, comprendidas dentro de cien grados del polo austral : con atlas". Resultados del Observatorio Nacional Argentino. 1. Bibcode: 1879RNAO....1.....G.
  13. ^ a b Mason, Brian D.; Wycoff, Gary L.; Hartkopf, William I.; Douglass, Geoffrey G.; Worley, Charles E. (December 2001). "The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog". The Astronomical Journal. 122 (6): 3466–3471. Bibcode: 2001AJ....122.3466M. doi: 10.1086/323920. ISSN  0004-6256.
Retrieved from " https://en.wikipedia.org/?title=HD_23474&oldid=1205370929"

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