HD 153261

Last updated
HD 153261
HD153261LightCurve.png
A light curve for HD 153261 from Hipparcos data, adapted from Lefèvre et al. (2009) [1]
Observation data
Epoch J2000       Equinox J2000
Constellation Ara
Right ascension 17h 01m 47.3875s [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 (Rv)–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

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.

In 1983, Christopher Stagg reported that he suspected that HD 153261 is a variable star, and his later observations confirmed that it is in fact variable. [10] [11] HD 153261 was given its variable star designation, V828 Arae, in 1987. [12]

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. [13]

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<span class="mw-page-title-main">Zeta Persei</span> Star in the constellation Perseus

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<span class="mw-page-title-main">PP Carinae</span> Star in the constellation Carina

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<span class="mw-page-title-main">2 Vulpeculae</span> Star in the constellation Vulpecula

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Chi<sup>2</sup> Orionis Star in the constellation Orion

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<span class="mw-page-title-main">V518 Carinae</span> Blue-hued variable star in the constellation Carina

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<span class="mw-page-title-main">Lambda Librae</span> Binary star system in the constellation Libra

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References

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