HD 135438

HD 135438 is a K-type giant star in the northern constellation of Boötes. With an apparent magnitude of 6.0, it lies about 650 light years away.

HD 135438
Observation data
Epoch J2000      Equinox J2000
Constellation Boötes
Right ascension 15h 14m 06.04269s[1]
Declination +31° 47′ 16.2454″[1]
Apparent magnitude (V) 5.97[2]
Characteristics
Spectral type K5III[3]
B−V color index 1.52[4]
Astrometry
Radial velocity (Rv)+4[5] km/s
Proper motion (μ) RA: +41.485[1] mas/yr
Dec.: −28.200[1] mas/yr
Parallax (π)5.0111 ± 0.1026 mas[1]
Distance650 ± 10 ly
(200 ± 4 pc)
Absolute magnitude (MV)−0.33[6]
Details
Mass1.2[7] M☉
Radius37.6[1] R☉
Luminosity734[1] L☉
Surface gravity (log g)1.73[1] cgs
Temperature3,960[1] K
Metallicity [Fe/H]+0.15[7] dex
Other designations
BD+32°2561, HD 135438, HIP 74561, HR 5674, SAO 64574.
Database references
SIMBADdata

HD 135438 has a magnitude 9.36 companion at an angular separation of 118.2″ along a position angle of 158° (as of 2012).[8] Gaia Data Release 3 parallaxes indicate that the visual companion is an unrelated background star.[9]

References
  1. 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. 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. Pickles, A.; Depagne, É. (2010). "All-Sky Spectrally Matched UBVRI - ZY and u‧ g‧ r‧ i‧ z‧ Magnitudes for Stars in the Tycho2 Catalog". Publications of the Astronomical Society of the Pacific. 122 (898): 1437. arXiv:1011.2020. Bibcode:2010PASP..122.1437P. doi:10.1086/657947. S2CID 54678796.
  4. Percy, John R. (December 1993), "The photometric variability of K giants", Publications of the Astronomical Society of the Pacific, 105 (694): 1422–1426, Bibcode:1993PASP..105.1422P, doi:10.1086/133324.
  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, S2CID 119231169.
  6. Gontcharov, G. A. (2017). "VizieR Online Data Catalog: Tycho-2 red giant branch and carbon stars (Gontcharov, 2011)". VizieR On-Line Data Catalog. Bibcode:2017yCat..90370769G.
  7. 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. Mason, B. D.; et al. (2014), "The Washington Visual Double Star Catalog", The Astronomical Journal, 122 (6): 3466–3471, Bibcode:2001AJ....122.3466M, doi:10.1086/323920, retrieved 2015-07-22.
  9. 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.
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