HD 74423

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[2] mas
Distance	1,550 ± 10 ly ; (476 ± 3 pc)
Details
Other designations
	HD 74423, CD-64 342, SAO 250298, TYC 8934-1662-1, TIC 355151781
Database references
SIMBAD	data

HD 74423 is a heartbeat binary star. HD 74423 A is said to be a sort of 'tear drop shape' 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.
Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.
"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.
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

Press release

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[DJM-2008-1] Staff (2 August 2008). "Finding the constellation which contains given sky coordinates". DJM.cc. Retrieved 31 July 2020.

[edr3-2] Brown, A. G. A.; et al. (Gaia collaboration). "Gaia Early Data Release 3: Summary of the contents and survey properties". Astronomy & Astrophysics (in press). arXiv:2012.01533. doi:10.1051/0004-6361/202039657. S2CID 227254300. Gaia EDR3 record for this source at VizieR.

[SIMBAD-3] "HD 74423 -- Star". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 31 July 2020.

[gray2017-4] 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.

[:1-5] 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.