Astronomy:HD 128333
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Short description: Star in the constellation Boötes
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| 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[2] mas |
| 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
- ↑ "Hipparcos Tools Interactive Data Access". ESA. https://www.cosmos.esa.int/web/hipparcos/interactive-data-access.
- ↑ 2.0 2.1 2.2 2.3 2.4 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.
- ↑ 3.0 3.1 3.2 Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode: 1986EgUBV........0M.
- ↑ 4.0 4.1 4.2 Eggen, O. J. (1992). "Asymptotic giant branch stars near the sun". The Astronomical Journal 104: 275. doi:10.1086/116239. Bibcode: 1992AJ....104..275E.
- ↑ Lebzelter, T.; Hinkle, K. H. (October 2002), "Velocity variability of semiregular and irregular variables", Astronomy and Astrophysics 393 (2): 563–571, doi:10.1051/0004-6361:20021085, Bibcode: 2002A&A...393..563L.
- ↑ 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, doi:10.1051/0004-6361:20041272, Bibcode: 2005A&A...430..165F.
- ↑ 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.
- ↑ 8.0 8.1 8.2 8.3 Anders, F.; Khalatyan, A.; Chiappini, C.; Queiroz, A. B.; Santiago, B. X.; Jordi, C.; Girardi, L.; Brown, A. G. A. et al. (2019-08-01). "Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18". Astronomy and Astrophysics 628: A94. doi:10.1051/0004-6361/201935765. ISSN 0004-6361. Bibcode: 2019A&A...628A..94A.
- ↑ 9.0 9.1 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. doi:10.1093/mnras/stx1433. ISSN 0035-8711. Bibcode: 2017MNRAS.471..770M.
- ↑ 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. https://articles.adsabs.harvard.edu/pdf/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". Information Bulletin on Variable Stars 1248: 1–25. Bibcode: 1977IBVS.1248....1K. https://ibvs.konkoly.hu/pub/ibvs/1201/1248.pdf. Retrieved 5 December 2024.
External links
- HR 5452 VizieR Bright Star Catalog entry
- Image HD 128333
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