Hd 153261

HD 153261
	; A light curve for HD 153261 from Hipparcos data, adapted from Lefèvre et al. (2009)
Observation data; Epoch J2000 Equinox J2000
Constellation	Ara
Right ascension	17h 01m 47.3875s
Declination	–58° 57′ 29.681″
Apparent magnitude (V)	6.137
Characteristics
Spectral type	B1 V:ne or B2 IVne
U−B color index	–0.956
B−V color index	–0.078
Astrometry
Radial velocity (Rv)	–6 km/s
Proper motion (μ)	RA: –2.91 mas/ yr ; Dec.: –9.01 mas/ yr
Parallax (π)	2.32 ± 0.38 mas
Distance	approx. 1,400 ly ; (approx. 430 pc)
Details
Mass	10.1 ± 0.3 M☉
Radius	4.5 R☉
Luminosity (bolometric)	11,045 L☉
Temperature	21,150 K
Age	20.4 ± 0.4 Myr
Other designations
	CD–58 6607, HD 153261, HIP 83323, HR 6304, SAO 244362, V828 Arae.
Database references
SIMBAD	data

HD 153261 is the Henry Draper Catalogue designation for a star in the southern constellation of Ara. It has an apparent visual magnitude of 6.137,^[3] placing it near the threshold of naked eye visibility. According to the Bortle Dark-Sky Scale, it can be viewed from dark suburban or rural skies. Based upon an annual parallax shift of just 2.32 mas,^[2] it is located at a distance of around 1,400 light-years (430 parsecs) from Earth.

This star has been catalogued with a stellar classification of B1 V:ne^[4] or B2 IVne,^[5] indicating that it is either a main sequence or a subgiant star. The 'n' indicates a nebulous spectrum created by the Doppler shift-broadened absorption lines from a rapid rotation, while the 'e' means this is a Be star, with the spectrum showing emission lines from hot, circumstellar gas. HD 153261 displays some variability with an amplitude of 0.090 in magnitude, and is a suspected spectroscopic binary.^[1]

HD 153261 is a large star with over ten^[5] times the Sun's mass and around 4.5^[7] the radius of the Sun. It shines with more than 11,000^[8] times the brightness of the Sun, with this energy being radiated into space at an effective temperature of 21,150 K.^[8] At this heat, it glows with the blue-white hue of a B-type star.^[10]

References

^ ^a ^b Lefèvre, L.; et al. (November 2009), "A systematic study of variability among OB-stars based on HIPPARCOS photometry", Astronomy and Astrophysics, 507 (2): 11411201, Bibcode: 2009A&A...507.1141L, doi: 10.1051/0004-6361/200912304.
^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752, Bibcode: 2007A&A...474..653V, doi: 10.1051/0004-6361:20078357, S2CID 18759600.
^ ^a ^b ^c ^d Kozok, J. R. (September 1985), "Photometric observations of emission B-stars in the southern Milky Way", Astronomy and Astrophysics Supplement Series, 61: 387–405, Bibcode: 1985A&AS...61..387K.
^ ^a ^b Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1975mcts.book.....H.
^ ^a ^b ^c ^d ^e Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.
^ Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode: 1967IAUS...30...57E.
^ ^a ^b Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754.
^ ^a ^b ^c ^d Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv: 1003.2335, Bibcode: 2010AN....331..349H, doi: 10.1002/asna.200911355, S2CID 111387483.
^ "HR 6304". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-08-03.{{ cite web}}: CS1 maint: postscript ( link)
^ "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-07-21.

External links

[aaa507_2_11411201-1] Lefèvre, L.; et al. (November 2009), "A systematic study of variability among OB-stars based on HIPPARCOS photometry", Astronomy and Astrophysics, 507 (2): 11411201, Bibcode: 2009A&A...507.1141L, doi: 10.1051/0004-6361/200912304.

[aaa474_2_653-2] ^ ^a ^b ^c ^d ^e ^f van Leeuwen, F. (November 2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv: 0708.1752, Bibcode: 2007A&A...474..653V, doi: 10.1051/0004-6361:20078357, S2CID 18759600.

[aass61_387-3] Kozok, J. R. (September 1985), "Photometric observations of emission B-stars in the southern Milky Way", Astronomy and Astrophysics Supplement Series, 61: 387–405, Bibcode: 1985A&AS...61..387K.

[houk1978-4] Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode: 1975mcts.book.....H.

[mnras410_1_190-5] Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (January 2011), "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun", Monthly Notices of the Royal Astronomical Society, 410 (1): 190–200, arXiv: 1007.4883, Bibcode: 2011MNRAS.410..190T, doi: 10.1111/j.1365-2966.2010.17434.x, S2CID 118629873.

[rgcrv-6] Evans, D. S. (June 20–24, 1966), "The Revision of the General Catalogue of Radial Velocities", in Batten, Alan Henry; Heard, John Frederick (eds.), Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30, vol. 30, University of Toronto: International Astronomical Union, p. 57, Bibcode: 1967IAUS...30...57E.

[aaa367_521-7] Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy and Astrophysics, 367 (2): 521–524, arXiv: astro-ph/0012289, Bibcode: 2001A&A...367..521P, doi: 10.1051/0004-6361:20000451, S2CID 425754.

[an331_4_349-8] Hohle, M. M.; Neuhäuser, R.; Schutz, B. F. (April 2010), "Masses and luminosities of O- and B-type stars and red supergiants", Astronomische Nachrichten, 331 (4): 349, arXiv: 1003.2335, Bibcode: 2010AN....331..349H, doi: 10.1002/asna.200911355, S2CID 111387483.

[SIMBAD-9] "HR 6304". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2010-08-03.{{ cite web}}: CS1 maint: postscript ( link)

[csiro-10] "The Colour of Stars", Australia Telescope, Outreach and Education, Commonwealth Scientific and Industrial Research Organisation, December 21, 2004, archived from the original on March 18, 2012, retrieved 2012-07-21.

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Observation data Epoch J2000 Equinox J2000
A light curve for HD 153261 from Hipparcos data, adapted from Lefèvre et al. (2009)^[1]
Constellation	Ara
Right ascension	17^h 01^m 47.3875^s^[2]
Declination	–58° 57′ 29.681″^[2]
Apparent magnitude (V)	6.137^[3]
Characteristics
Spectral type	B1 V:ne^[4] or B2 IVne^[5]
U−B color index	–0.956^[3]
B−V color index	–0.078^[3]
Astrometry

Radial velocity (R_v)	–6^[6] km/s
Proper motion (μ)	RA: –2.91^[2] mas/ yr Dec.: –9.01^[2] mas/ yr
Parallax (π)	2.32 ± 0.38 mas^[2]
Distance	approx. 1,400 ly (approx. 430 pc)

Details

Mass	10.1 ± 0.3^[5] `M`_☉
Radius	4.5^[7] `R`_☉
Luminosity (bolometric)	11,045^[8] `L`_☉
Temperature	21,150^[8] K
Age	20.4 ± 0.4^[5] Myr

Other designations
CD–58 6607, HD 153261, HIP 83323, HR 6304, SAO 244362, V828 Arae.^[9]
Database references
SIMBAD	data