 The visual band light curve of HD 126009, plotted from data presented by Tabur et al. (2009) | |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14 22 14.00070 |
| Declination | +29° 22′ 11.7179″ |
| Apparent magnitude (V) | 6.6 |
| Characteristics | |
| Spectral type | M3III |
| U−B color index | +1.46 |
| B−V color index | +1.60 |
| Variable type | Irregular |
| Astrometry | |
| Radial velocity (Rv) | −19.66±0.54 km/s |
| Proper motion (μ) | RA: −39.980 mas/yr Dec.: −26.201 mas/yr |
| Parallax (π) | 4.5229 ± 0.0973 mas |
| Distance | 720 ± 20 ly (221 ± 5 pc) |
| Absolute magnitude (MV) | −0.268 |
| Details | |
| Mass | 1.8 M☉ |
| Radius | 71 R☉ |
| Luminosity | 943 L☉ |
| Temperature | 3,227 K |
| Age | 1.6 Gyr |
| Other designations | |
| CI Boötes, BD+30°2513, HD126009, HIP 70236, SAO 83312. | |
| Database references | |
| SIMBAD | data |
HD 126009 or CI Boötis is a variable star in the northern constellation of Boötes. With an apparent magnitude of 6.6, it would be extremely difficult to see with the naked eye even under the very best observing conditions, but can easily be seen with binoculars.
The German astronomer Wolfgang Strohmeier announced that HD 126009 is a variable star in 1960. It was given its variable star designation, CI Boötis, in 1978.
References
- Tabur, V.; Bedding, T. R.; Kiss, L. L.; Moon, T. T.; Szeidl, B.; Kjeldsen, H. (December 2009). "Long-term photometry and periods for 261 nearby pulsating M giants". Monthly Notices of the Royal Astronomical Society. 400 (4): 1945–1961. arXiv:0908.3228. Bibcode:2009MNRAS.400.1945T. doi:10.1111/j.1365-2966.2009.15588.x.
- ^ 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.
- ^ Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)", Catalogue of Eggen's UBV Data. SIMBAD, Bibcode:1986EgUBV........0M
- ^ Tabur, V.; Bedding, T. R. (2009), "Long-term photometry and periods for 261 nearby pulsating M giants", Monthly Notices of the Royal Astronomical Society, 400 (4): 1945–61, arXiv:0908.3228, Bibcode:2009MNRAS.400.1945T, doi:10.1111/j.1365-2966.2009.15588.x, S2CID 15358380
- Mennessier, M. O.; et al. (August 2001), "Long period variable stars: galactic populations and infrared luminosity calibrations", Astronomy and Astrophysics, 374 (3): 968–979, arXiv:astro-ph/0105552, Bibcode:2001A&A...374..968M, doi:10.1051/0004-6361:20010764, S2CID 15721872.
- Famaey, B.; et al. (2009). "Spectroscopic binaries among Hipparcos M giants,. I. Data, orbits, and intrinsic variations". Astronomy and Astrophysics. 498 (2): 627–640. arXiv:0901.0934. Bibcode:2009A&A...498..627F. doi:10.1051/0004-6361/200810698. S2CID 18739721.
- 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.
- Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. S2CID 119258214.
- Strohmeier, W. (1960). "New Bright Variables". IAU Circular. 1735. Retrieved 5 December 2024.
- Kholopov, P. N.; Kukarkina, N. P.; Perova, N. B. (April 1978). "63rd Name-List of Variable Stars" (PDF). Information Bulletin on Variable Stars. 1414: 1–10. Bibcode:1978IBVS.1414....1K. Retrieved 5 December 2024.
External links
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