HD 74423
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Volans[1] |
| Right ascension | 08h 40m 17.985s[2] |
| Declination | −64° 50′ 16.84″[2] |
| Apparent magnitude (V) | 8.61±0.01[3] |
| Characteristics | |
| Spectral type | A7VkA0mA0 λ Boo[4] |
| Apparent magnitude (B) | 8.81±0.02[3] |
| Apparent magnitude (V) | 8.61±0.01[3] |
| Apparent magnitude (J) | 8.065±0.020[3] |
| Apparent magnitude (H) | 8.021±0.067[3] |
| Apparent magnitude (K) | 7.944±0.040[3] |
| Astrometry | |
| Proper motion (μ) | RA: −9.719[2] mas/yr Dec.: 11.732[2] mas/yr |
| Parallax (π) | 2.1018 ± 0.0150 mas[2] |
| Distance | 1,550 ± 10 ly (476 ± 3 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 74423 is a heartbeat binary star. HD 74423 A is said to be a sort of 'tear drop shape'[citation needed] and pulsates on only one side.[5] This is caused by tidal interaction with its partner.[5]
References
- ^ Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 31 July 2020.
- ^ a b c d e Brown, A. G. A.; et al. (Gaia collaboration) (2021). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics. 649: A1. arXiv:2012.01533. Bibcode:2021A&A...649A...1G. doi:10.1051/0004-6361/202039657. S2CID 227254300. (Erratum: doi:10.1051/0004-6361/202039657e). Gaia EDR3 record for this source at VizieR.
- ^ a b c d e f "HD 74423 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 31 July 2020.
- ^ Gray, R. O.; Riggs, Q. S.; Koen, C.; Murphy, S. J.; Newsome, I. M.; Corbally, C. J.; Cheng, K. -P.; Neff, J. E. (2017). "The Discovery of λ Bootis Stars: The Southern Survey I" (PDF). The Astronomical Journal. 154 (1): 31. Bibcode:2017AJ....154...31G. doi:10.3847/1538-3881/aa6d5e.
{{cite journal}}: CS1 maint: unflagged free DOI (link) - ^ a b Handler, G.; Kurtz, D. W.; Rappaport, S. A.; Saio, H.; Fuller, J.; Jones, D.; Guo, Z.; Chowdhury, S.; Sowicka, P.; Aliçavuş, F. Kahraman; Streamer, M. (9 March 2020). "Tidally trapped pulsations in a close binary star system discovered by TESS" (PDF). Nature Astronomy. 4 (7): 684–689. arXiv:2003.04071. doi:10.1038/s41550-020-1035-1. ISSN 2397-3366. S2CID 212634328.
External links
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