HD 128333
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 34m 39.62069s[2] |
| Declination | +49° 22′ 06.0729″[2] |
| Apparent magnitude (V) | 5.74[3] |
| Characteristics | |
| Evolutionary stage | AGB[4] |
| Spectral type | M1III[4] |
| U−B color index | +1.88[3] |
| B−V color index | +1.56[3] |
| Variable type | Lb[5] |
| Astrometry | |
| Radial velocity (Rv) | −23.93[6] km/s |
| Proper motion (μ) | RA: −45.517[2] mas/yr Dec.: +49.940[2] mas/yr |
| Parallax (π) | 4.6569 ± 0.0526 mas[2] |
| Distance | 700 ± 8 ly (215 ± 2 pc) |
| Absolute magnitude (MV) | −0.32[7] |
| Details | |
| Mass | 1.13[8] M☉ |
| Radius | 67[9] R☉ |
| Luminosity | 869[9] L☉ |
| Surface gravity (log g) | 1.00[8] cgs |
| Temperature | 3,734[8] K |
| Metallicity [Fe/H] | +0.10[8] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 128333 or CH Boötis is an irregular variable star in the northern constellation of Boötes. With an apparent magnitude of 5.7, it is faintly visibly to the naked eye under good observing conditions.
The variability of the brightness of HD 128333 was announced by Joel Stebbins and Charles Morse Huffer in 1928, based on observations made at Washburn Observatory.[10] It was given its variable star designation, CH Boötis, in 1977.[11]
It is currently on the asymptotic giant branch of the HR diagram.[4]
References
[edit]- ^ "Hipparcos Tools Interactive Data Access". Hipparcos. ESA. Retrieved 8 December 2021.
- ^ a b c d e 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.
- ^ a b c Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M.
- ^ a b c Eggen, O. J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal. 104: 275. Bibcode:1992AJ....104..275E. doi:10.1086/116239.
- ^ Lebzelter, T.; Hinkle, K. H. (October 2002), "Velocity variability of semiregular and irregular variables", Astronomy and Astrophysics, 393 (2): 563–571, Bibcode:2002A&A...393..563L, doi:10.1051/0004-6361:20021085.
- ^ Famaey, B.; et al. (2005), "Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters", Astronomy and Astrophysics, 430: 165–186, arXiv:astro-ph/0409579, Bibcode:2005A&A...430..165F, doi:10.1051/0004-6361:20041272, S2CID 17804304.
- ^ 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.
- ^ a b c d Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A.; Matijevic, G.; Monari, G.; Cantat-Gaudin, T. (2019-08-01). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics. 628: A94. arXiv:1904.11302. Bibcode:2019A&A...628A..94A. doi:10.1051/0004-6361/201935765. ISSN 0004-6361.
- ^ a b McDonald, I.; Zijlstra, A. A.; Watson, R. A. (15 June 2017). "Fundamental parameters and infrared excesses of Tycho–Gaia stars". Monthly Notices of the Royal Astronomical Society. 471 (1): 770–791. arXiv:1706.02208. Bibcode:2017MNRAS.471..770M. doi:10.1093/mnras/stx1433. eISSN 1365-2966. ISSN 0035-8711.
- ^ Stebbins, Joel; Huffer, C. M. (1928). "The Constancy of the Light of Red Stars". Publications of the Washburn Observatory. 15: 137–174. Bibcode:1928PWasO..15..137S. Retrieved 5 December 2024.
- ^ Kukarkin, B. V.; Kholopov, P. N.; Fedorovich, V. P.; Kireyeva, N. N.; Kukarkina, N. P.; Medvedeva, G. I.; Perova, N. B. (March 1977). "62nd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1248: 1–25. Bibcode:1977IBVS.1248....1K. Retrieved 5 December 2024.
External links
[edit]- HR 5452 VizieR Bright Star Catalog entry
- Image HD 128333
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