HD 23523

Last updated
HD 23523
Camelopardalis constellation map.svg
Red circle.svg
Location of HD 23523 on the map (circled)
Observation data
Epoch J2000.0        Equinox J2000.0 (ICRS)
Constellation Camelopardalis [1]
Right ascension 03h 49m 36.58592s [2]
Declination +63° 17′ 49.0518″ [2]
Apparent magnitude  (V)5.82 [3] (6.31 + 7.11) [4]
Characteristics
Spectral type A5 Vn [5]
B−V color index +0.18 [6]
Astrometry
Radial velocity (Rv)−9.6±3.4 [7] km/s
Proper motion (μ)RA: −11.630 mas/yr [2]
Dec.: −61.457 mas/yr [2]
Parallax (π)13.9498±0.3245  mas [2]
Distance 234 ± 5  ly
(72 ± 2  pc)
Absolute magnitude  (MV)+1.55 [1] (combined)
Orbit [8]
PrimaryHD 23523A [4]
CompanionHD 23523B [4]
Period (P)10.180±0.509 yr
Semi-major axis (a)0.1020±0.0031″
Eccentricity (e)0.441
Details
A
Mass 1.75 or 1.81 [9]   M☉
B
Mass 1.64 or 1.51 [9]   M☉
Other designations
Moaï 1, AG+63°280, BD+62°612, GC 4560, HD 23523, HIP 17891, HR 1158, SAO 12917, WDS J03496+6318AB [10]
Database references
SIMBAD data

HD 23523 (HR 1158) is a binary star [11] located in the northern circumpolar constellation Camelopardalis. It has a combined apparent magnitude of 5.82, [3] making it faintly visible to the naked eye under ideal conditions. When resolved, the primary has an apparent magnitude of 6.31 while the secondary has a magntiude of 7.11. [4] The system is located relatively close at a distance of about 234 light-years based on Gaia DR3 parallax measurements [2] and it currently drifting closer with a somewhat heliocentric radial velocity of −9.6  km/s . [7] At its current distance, HD 23523's combined brightness is diminished by 0.16 magnitudes due to interstellar extinction [12] and it has a combined absolute magnitude of +1.55. [1]

The system was first discovered to be a double star in 1996 by Marcel Carbillet and colleagues after speckle interferometry observations. [13] The stars are only about a tenth of an arcsecond apart, [4] making observing their individual properties difficult. The discovery paper suggested that the two components might be equal based on the dynamical mass. [13] Overall, HD 23523 has a stellar classification of A5 Vn, [5] indicating that it is an A-type main-sequence star with broad or nebulous absorption lines due to rapid rotation. The primary has a mass either 1.75 or 1.81 times the mass of the Sun while the companion has a mass 1.64 or 1.51 times that of the Sun, [9] depending on the approach.

References

  1. 1 2 3 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. XHIP record for this object at VizieR.
  2. 1 2 3 4 5 6 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.
  3. 1 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. S2CID   17128864.
  4. 1 2 3 4 5 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. S2CID   119533755.
  5. 1 2 Cowley, A.; Cowley, C.; Jaschek, M.; Jaschek, C. (April 1969). "A study of the bright stars. I. A catalogue of spectral classifications". The Astronomical Journal. 74: 375. Bibcode:1969AJ.....74..375C. doi:10.1086/110819. ISSN   0004-6256. S2CID   121555804.
  6. ↑ Ljunggren, B.; Oja, T. (1965). "Photoelectric measurements of magnitudes and colours for 849 stars". Arkiv för Astronomi. 3: 439–465. Bibcode:1965ArA.....3..439L. ISSN   0004-2048.
  7. 1 2 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. eISSN   1562-6873. ISSN   1063-7737. S2CID   119231169.
  8. ↑ Malkov, O. Yu.; Tamazian, V. S.; Docobo, J. A.; Chulkov, D. A. (October 2012). "Dynamical masses of a selected sample of orbital binaries". Astronomy & Astrophysics. 546: A69. Bibcode:2012A&A...546A..69M. doi: 10.1051/0004-6361/201219774 . eISSN   1432-0746. ISSN   0004-6361. S2CID   122594428.
  9. 1 2 3 Cvetkovic, Zorica; Ninkovic, S. (June 2010). "On the component masses of visual binaries". Serbian Astronomical Journal. 180 (180): 71–80. Bibcode:2010SerAJ.180...71C. doi: 10.2298/SAJ1080071C . S2CID   54938242.
  10. ↑ "HD 23523". SIMBAD . Centre de données astronomiques de Strasbourg . Retrieved June 22, 2023.
  11. ↑ Eggleton, P. P.; Tokovinin, A. A. (11 September 2008). "A catalogue of multiplicity among bright stellar systems". Monthly Notices of the Royal Astronomical Society. 389 (2): 869–879. arXiv: 0806.2878 . Bibcode:2008MNRAS.389..869E. doi: 10.1111/j.1365-2966.2008.13596.x . eISSN   1365-2966. ISSN   0035-8711. S2CID   14878976.
  12. ↑ Gontcharov, George A.; Mosenkov, Aleksandr V. (28 September 2017). "Verifying reddening and extinction for Gaia DR1 TGAS main sequence stars". Monthly Notices of the Royal Astronomical Society. 472 (4): 3805–3820. arXiv: 1709.01160 . Bibcode:2017MNRAS.472.3805G. doi: 10.1093/mnras/stx2219 . eISSN   1365-2966. ISSN   0035-8711. S2CID   118879856.
  13. 1 2 Carbillet, M.; Lopez, B.; Aristidi, E.; Bresson, Y.; Aime, C.; Ricort, G.; Prieur, J. -L.; Koechlin, L.; Helmer, G.; Lefevre, J.; Cruzalebes, P. (October 1996). "Discovery of a new bright close double star". Astronomy and Astrophysics. 314: 112–114. Bibcode:1996A&A...314..112C. ISSN   0004-6361. S2CID   116630348.
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