30 Persei

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30 Persei
Observation data
Epoch J2000       Equinox J2000
Constellation Perseus
Right ascension 03h 17m 47.35287s [1]
Declination +44° 01 30.0800 [1]
Apparent magnitude  (V)5.49 [2]
Characteristics
Spectral type B7 V [3]
B−V color index −0.060±0.004 [2]
Astrometry
Radial velocity (Rv)+4.0±2.0 [4]  km/s
Proper motion (μ)RA: +26.07 [1]   mas/yr
Dec.: −24.47 [1]   mas/yr
Parallax (π)4.46 ± 0.39  mas [1]
Distance 730 ± 60  ly
(220 ± 20  pc)
Absolute magnitude  (MV)−0.96 [2]
Orbit [3]
Period (P)36.5±0.1 d
Eccentricity (e)0.3±0.2
Periastron epoch (T)24,407,531.7±0.1
Argument of periastron (ω)
(secondary)
312±9°
Semi-amplitude (K1)
(primary)
20±3 km/s
Details
30 Per A
Mass 4.24±0.12 [5]   M
Luminosity 611+130
−238
[5]   L
Temperature 9,908 [6]   K
Rotational velocity (v sin i)212 [5]  km/s
Other designations
30 Per, BD+43° 674, HD  20315, HIP  15338, HR  982, SAO  38704 [7]
Database references
SIMBAD data

30 Persei is a binary star [3] system in the northern constellation Perseus. It is faintly visible to the naked eye with an apparent visual magnitude of 5.49. [2] Based upon an annual parallax shift of 4.46±0.39  mas , [1] is located roughly 730  light years from the Sun. It is a member of the Perseus OB3 association, which includes the Alpha Persei Cluster. [8]

This is a single-lined spectroscopic binary star system with an orbital period of 36.5 days and an eccentricity of roughly 0.3. The visible component is a B-type main-sequence star with a stellar classification of B7 V. [3] It is spinning rapidly with a projected rotational velocity of 212 km/s. [5] The star has 4.2 [5] times the mass of the Sun and is radiating around 611 [5] times the Sun's luminosity from its photosphere at an effective temperature of 9,908 K. [6]

Related Research Articles

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<span class="mw-page-title-main">2 Lyncis</span> Binary star in the constellation Lynx

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

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<span class="mw-page-title-main">136 Tauri</span> Star in the constellation Taurus

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HD 85622 is a binary star system in the southern constellation of Vela. It is visible to the naked eye with an apparent visual magnitude of 4.58. The distance to HD 85622 can be estimated from its annual parallax shift of 4.3 mas, yielding a value of 750 light years. It is moving further from the Earth with a heliocentric radial velocity of +8 km/s.

Xi<sup>1</sup> Lupi Probable binary star system in the constellation Lupus

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<span class="mw-page-title-main">42 Persei</span> Binary star system in the constellation Perseus

42 Persei is a binary star system in the northern constellation of Perseus. It has the Bayer designation n Persei, while 42 Persei is the Flamsteed designation. The system is visible to the naked eye as a dim, white-hued point of light with an apparent visual magnitude of 5.11. It is located around 93 parsecs (302 ly) distant from the Sun, but is drifting closer with a radial velocity of −12.4 km/s.

<span class="mw-page-title-main">55 Persei</span> Star in the constellation Perseus

55 Persei is a single, blue-white hued star in the northern constellation Perseus. It is faintly visible to the naked eye under good seeing conditions, having an apparent visual magnitude of 5.73. Based upon an annual parallax shift of 8.50±0.38 mas as seen from Earth's orbit, the star is located about 380 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction of 0.39 due to interstellar dust.

<span class="mw-page-title-main">Nu Leonis</span> Binary star system in the constellation Leo

ν Leonis, Latinised as Nu Leonis, is a binary star system in the zodiac constellation of Leo. It is faintly visible to the naked eye with an apparent visual magnitude of 5.15; parallax measurements indicate it is around 500 light years away. At this distance, the visual extinction from interstellar dust is 0.33 magnitudes.

References

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