HD 155448

HD 155448
Observation data; Epoch J2000.0 Equinox J2000.0
Constellation	Scorpius
Right ascension	17h 12m 58.77s[1]
Declination	−32° 14′ 33.57″[1]
Apparent magnitude (V)	8.72[2]
Characteristics
HD 155448 A
Evolutionary stage	Main sequence
Spectral type	B1V
B−V color index	−0.27±0.02
Characteristics
HD 155448Ba
Evolutionary stage	main sequence star
Spectral type	B6V[3]
B−V color index	−0.15±0.02[3]
Variable type	C: Be[3]
HD 155448 Bb
Evolutionary stage	main sequence star
Spectral type	B9V[3]
B−V color index	−0.08±0.02[3]
Astrometry
Proper motion (μ)	RA: 2.77±1.98[1] mas/yr ; Dec.: −0.85±1.07[1] mas/yr
Database references
SIMBAD	data

HD 155448 is a quintuple star system consisting of 5 young B-type stars named HD 155448 A, B1, B2, C, and D. With an apparent magnitude of 8.72,[2] it is too dim to be visible with the naked eye.

History

Before 2011 the system was believed to contain only 4 stars (at least more than 2 stars),[2] HD 155448 A, B, C, and D. However, a study conducted at the European Southern Observatory[4] in Chile concluded that the "B" star is actually a binary star, thus reclassifying it as a quintuple star system.

HD 155448 A

HD 155448 A is the primary component of the system.

References

Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; van Leeuwen, F. (1997-07-01). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. ISSN 0004-6361.
"HD 155448". sim-basic. Retrieved 21 March 2021.
Schütz, O.; Meeus, G.; Carmona, A.; Juhász, A.; Sterzik, M. F. (2011-09-01). "The young B-star quintuple system HD 155448". Astronomy and Astrophysics. 533: A54. arXiv:1108.1557. Bibcode:2011A&A...533A..54S. doi:10.1051/0004-6361/201016396. ISSN 0004-6361.
Schuetz, O.; Meeus, G.; Carmona, A.; Juhász, A.; Sterzik, M. F. (September 2011). "The young B-star quintuple system HD 155448". Astronomy & Astrophysics. 533: A54. arXiv:1108.1557. Bibcode:2011A&A...533A..54S. doi:10.1051/0004-6361/201016396. ISSN 0004-6361. S2CID 56143776.

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[random-1] Perryman, M. A. C.; Lindegren, L.; Kovalevsky, J.; Hoeg, E.; Bastian, U.; Bernacca, P. L.; Crézé, M.; Donati, F.; Grenon, M.; Grewing, M.; van Leeuwen, F. (1997-07-01). "The HIPPARCOS Catalogue". Astronomy and Astrophysics. 323: L49–L52. Bibcode:1997A&A...323L..49P. ISSN 0004-6361.

[SIMBAD-2] "HD 155448". sim-basic. Retrieved 21 March 2021.

[class-3] Schütz, O.; Meeus, G.; Carmona, A.; Juhász, A.; Sterzik, M. F. (2011-09-01). "The young B-star quintuple system HD 155448". Astronomy and Astrophysics. 533: A54. arXiv:1108.1557. Bibcode:2011A&A...533A..54S. doi:10.1051/0004-6361/201016396. ISSN 0004-6361.

[schuetz2011-4] Schuetz, O.; Meeus, G.; Carmona, A.; Juhász, A.; Sterzik, M. F. (September 2011). "The young B-star quintuple system HD 155448". Astronomy & Astrophysics. 533: A54. arXiv:1108.1557. Bibcode:2011A&A...533A..54S. doi:10.1051/0004-6361/201016396. ISSN 0004-6361. S2CID 56143776.