52 Sagittarii

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52 Sagittarii
Sagittarius constellation map.svg
Red circle.svg
Location of 52 Sagittarii (circled)
Observation data
Epoch J2000       Equinox J2000
Constellation Sagittarius
Right ascension 19h 36m 42.43288s [1]
Declination −24° 53 01.0288 [1]
Apparent magnitude  (V)4.59 [2] + 9.2
Characteristics
Evolutionary stage main sequence [3]
Spectral type B8/9V [4] + K2–4V
U−B color index −0.15 [5]
B−V color index −0.06 [5]
Astrometry
Radial velocity (Rv)−19.00 [6]  km/s
Proper motion (μ)RA: +68.30 [1]   mas/yr
Dec.: −21.51 [1]   mas/yr
Parallax (π)17.20 ± 0.23  mas [1]
Distance 190 ± 3  ly
(58.1 ± 0.8  pc)
Absolute magnitude  (MV)0.77 [2]
Details
52 Sgr A
Mass 3.0±0.1 [7]   M
Radius 2.1 [8]   R
Luminosity 60.5+1.9
−1.8
[3]   L
Surface gravity (log g)4.19 [9]   cgs
Temperature 10,592+74
−72
[3]   K
Metallicity [Fe/H]0.00 [10]   dex
Rotational velocity (v sin i)48 [3]  km/s
Age 57.3±11.7 [7]   Myr
Other designations
h2 Sgr, 52 Sgr, NSV  12191, CD−25°14184, GC  27089, HD  184707, HIP  96465, HR  7440, SAO  188337, CCDM J19367-2453AB, WDS J19367-2453AB, GSC  06893-02132 [11]
Database references
SIMBAD data

52 Sagittarii is a binary star [12] system in the southern constellation of Sagittarius. It has the Bayer designation h2 Sagittarii, while 52 Sagittarii is the Flamsteed designation. This system is visible to the naked eye as a faint, blue-white hued point of light with an apparent visual magnitude of 4.59. [2] It is located approximately 190 light years away based on parallax, [1] but is drifting closer with a radial velocity of −19 km/s. [6]

The primary component is a B-type main-sequence star with a stellar classification of B8/9V. [4] Garrison and Gray (1994) assigned it a class of kB8 hB9 HeA0 Va (Sr Fe II), [13] displaying the calcium K line of a B8 class star, the hydrogen lines of a B9 star, and the helium lines of an A0 star, along with overabundances of strontium and iron. It is around 57 [7] million years old with three [7] times the mass of the Sun and about 2.1 [8] times the Sun's radius. It is radiating 60.5 [3] times the luminosity of the Sun from its photosphere at an effective temperature of 10,592 K. [3] The star is spinning with a projected rotational velocity of 48 km/s. [3]

52 Sagittarii has one companion at an angular separation of 2.4 . This object is magnitude 9.2 with a spectral class in the K2V-K4V range, and is believed to be the source of X-ray emissions from the system. [14] [15]

Related Research Articles

Rho<sup>1</sup> Sagittarii Star in the constellation Sagittarius

Rho1 Sagittarii, Latinized from ρ1 Sagittarii, is a single, variable star in the southern constellation of Sagittarius. It has a white hue and is visible to the naked eye with an apparent visual magnitude that fluctuates around 3.93. The distance to this star is approximately 127 light years based on parallax, and it is drifting further away with a radial velocity of +1.2 km/s. It is positioned near the ecliptic and so it can be occulted by the Moon.

Theta<sup>2</sup> Sagittarii Star in the constellation Sagittarius

Theta2 Sagittarii, Latinized from θ2 Sagittarii, is a solitary star in the zodiac constellation of Sagittarius. It is faintly visible to the naked eye with an apparent visual magnitude of +5.30. The star is progressing in the general direction of the Sun with a radial velocity of −17.60 km/s. Based upon an annual parallax shift of 20.62 mas as seen from Earth, it is located around 158 light years from the Sun. The star is drifting closer with a radial velocity of −17.6 km/s.

<span class="mw-page-title-main">Delta Sculptoris</span> Triple star system in the constellation of Sculptor

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<span class="mw-page-title-main">Gamma Scuti</span> Star in the constellation Scutum

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

ν Tauri, Latinized as Nu Tauri, is a single star in the zodiac constellation of Taurus. It is a white-hued star and is visible to the naked eye with an apparent visual magnitude of +3.91. This object is located 117 light years from the Sun based on parallax, but is drifting closer with a radial velocity of −6 km/s. It is predicted to come to within roughly 18.4 ly of the Sun in around five million years.

<span class="mw-page-title-main">Iota Tauri</span> Double star in the constellation Taurus

Iota Tauri, Latinized from ι Tauri, is a white-hued star in the zodiac constellation Taurus and an outlying member of the Hyades star cluster. It is visible to the naked eye with an apparent visual magnitude of 4.62, and is located at an estimated distance of about 173 light years based upon parallax measurements. The star is moving away from the Sun with a radial velocity of +38 km/s.

<span class="mw-page-title-main">72 Ophiuchi</span> Binary star system in the constellation Ophiuchus

72 Ophiuchi is a binary star system in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, white-hued point of light with a combined apparent visual magnitude of 3.73. It is located approximately 86.9 light years away from the Sun based on parallax, but is moving closer with a heliocentric radial velocity of -23.9 km/s.

<span class="mw-page-title-main">Epsilon Hydri</span> Star in the constellation Hydrus

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Theta Indi is a binary star in the constellation Indus. Its apparent magnitude is 4.40 and it is approximately 98.8 light years away based on parallax. The smaller companion, B, has a spectral type of G0V and an apparent magnitude of 7.18 at a separation of 6.71″. Recent observations suggest the primary is itself a binary with components Aa and Ab orbiting at 0.0617″, estimated period about 1.3 years.

<span class="mw-page-title-main">Beta Octantis</span> Astrometric binary star in the constellation Octans

Beta Octantis, Latinized from β Octantis, is a probable astrometric binary star system in the southern circumpolar constellation of Octans. It is faintly visible to the naked eye with an apparent visual magnitude of 4.13. Based upon an annual parallax shift of 21.85 mas as seen from Earth, it is located about 149 light years from the Sun. It is moving away from the Sun with a radial velocity of +19 km/s.

<span class="mw-page-title-main">44 Ophiuchi</span> Star in the constellation Ophiuchus

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<span class="mw-page-title-main">58 Ophiuchi</span> Star in the constellation Ophiuchus

58 Ophiuchi is a single star in the equatorial constellation of Ophiuchus. It is visible to the naked eye as a faint, yellow-white hued star with an apparent visual magnitude of 4.86. This object is approximately 57.6 light years away based on parallax, and is drifting further from the Earth with a heliocentric radial velocity of +10 km/s.

<span class="mw-page-title-main">32 Orionis</span> Triple star system in the constellation Orion

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<span class="mw-page-title-main">34 Persei</span> Binary star system in the constellation Perseus

34 Persei is a binary star system in the northern constellation of Perseus. It is visible to the naked eye as a faint, blue-white hued point of light with a combined apparent visual magnitude of 4.67. The system is located approximately 540 light years away from the Sun based on parallax, but it is drifting closer with a radial velocity of −3.5 km/s. It is a likely member of the Alpha Persei Cluster.

<span class="mw-page-title-main">32 Persei</span> Star in the constellation Perseus

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