Astronomy:HD 28246

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Short description: High proper motion star in the constellation Caelum
HD 28246
Observation data
Equinox J2000.0]] (ICRS)
Constellation Caelum[1]
Right ascension  04h 25m 19.1197s[2]
Declination −44° 09′ 39.222″[2]
Apparent magnitude (V) 6.38 ± 0.01[3]
Characteristics
Evolutionary stage main sequence[2]
Spectral type F5.5 V[4]
B−V color index +0.44[5]
Astrometry
Radial velocity (Rv)14.9 ± 0.3[6] km/s
Proper motion (μ) RA: +27.324[2] mas/yr
Dec.: +66.539[2] mas/yr
Parallax (π)26.8312 ± 0.018[2] mas
Distance121.56 ± 0.08 ly
(37.27 ± 0.03 pc)
Absolute magnitude (MV)+3.55[1]
Details
Mass1.36[7] M☉
Radius1.38[7] R☉
Luminosity3.18[7] L☉
Surface gravity (log g)4.29[7] cgs
Temperature6,570[7] K
Metallicity [Fe/H]+0.02[8] dex
Rotation1.072 days[9]
Rotational velocity (v sin i)8[8] km/s
Age1.58[10] Gyr
Other designations
CD−44°1546, CPD−44°478, GC 5380, HD 28246, HIP 20630, HR 1404, SAO 216790
Database references
SIMBADdata

HD 28246 (HR 1404) is a solitary star located in the southern constellation Caelum. It has an apparent magnitude of 6.38,[3] placing it near the max visibility to the unaided eye. The star is located relatively close at a distance of about 122[2] light years but is recceding with a heliocentric radial velocity of 14.9 km/s.[6]

HD 28246 has a stellar classification of F5.5 V,[4] indicating that it is an ordinary F-type main sequence star. At present it has 1.36 times the mass of the Sun and shines at 3.18 solar luminosities from its photosphere at an effective temperature of 6,570 K,[7] giving it a yellow-white glow. HD 28246 has an iron abundance 105%[8] that of the Sun, placing it at solar metallicity. At an age of 1.58 billion years,[10] it spins leisurely with a projected rotational velocity of 8 km/s.[8]

References

  1. ↑ 1.0 1.1 1.2 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A  XHIP record for this object at VizieR.
  2. ↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940  Gaia DR3 record for this source at VizieR.
  3. ↑ 3.0 3.1 3.2 Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P. et al. (March 2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics 355: L27–L30. ISSN 0004-6361. Bibcode: 2000A&A...355L..27H. 
  4. ↑ 4.0 4.1 4.2 Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (July 2006). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 pc--The Southern Sample". The Astronomical Journal 132 (1): 161–170. doi:10.1086/504637. Bibcode: 2006AJ....132..161G. 
  5. ↑ 5.0 5.1 Johnson, H. L.; Mitchell, R. I.; Iriarte, B.; Wisniewski, W. Z. (1 January 1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory 4: 99–110. Bibcode: 1966CoLPL...4...99J. 
  6. ↑ 6.0 6.1 6.2 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. doi:10.1134/S1063773706110065. ISSN 1063-7737. Bibcode: 2006AstL...32..759G. 
  7. ↑ 7.0 7.1 7.2 7.3 7.4 7.5 7.6 Stassun, Keivan G. et al. (2019). "The Revised TESS Input Catalog and Candidate Target List". The Astronomical Journal 158 (4): 138. doi:10.3847/1538-3881/ab3467. Bibcode: 2019AJ....158..138S. 
  8. ↑ 8.0 8.1 8.2 8.3 8.4 Nordström, B.; Mayor, M.; Andersen, J.; Holmberg, J.; Pont, F.; Jørgensen, B. R.; Olsen, E. H.; Udry, S. et al. (May 2004). "The Geneva-Copenhagen survey of the Solar neighbourhood: Ages, metallicities, and kinematic properties of ~14 000 F and G dwarfs". Astronomy & Astrophysics 418 (3): 989–1019. doi:10.1051/0004-6361:20035959. ISSN 0004-6361. Bibcode: 2004A&A...418..989N. 
  9. ↑ 9.0 9.1 Oelkers, Ryan J.; Rodriguez, Joseph E.; Stassun, Keivan G.; Pepper, Joshua; Somers, Garrett; Kafka, Stella; Stevens, Daniel J.; Beatty, Thomas G. et al. (2018). "Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey". The Astronomical Journal 155 (1): 39. doi:10.3847/1538-3881/aa9bf4. Bibcode: 2018AJ....155...39O. 
  10. ↑ 10.0 10.1 10.2 David, Trevor J.; Hillenbrand, Lynne A. (12 May 2015). "The Ages of Early-type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets". The Astrophysical Journal 804 (2): 146. doi:10.1088/0004-637X/804/2/146. ISSN 0004-637X. Bibcode: 2015ApJ...804..146D. 
  11. ↑ 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. doi:10.1111/j.1365-2966.2012.21873.x. ISSN 0035-8711. Bibcode: 2012MNRAS.427..343M. 



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