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White-hued star in the constellation Scorpius
Psi Scorpii , which is
Latinized from ψ Scorpii, is a
star in the
zodiac
constellation of
Scorpius . It is white in hue and has an
apparent visual magnitude of 4.94,
[2] which is bright enough to be faintly visible to the naked eye. Based upon
parallax measurements,
[1] it is located at a distance of around 162
light years from the
Sun . Data collected during the
Hipparcos mission suggests it is an
astrometric binary , although nothing is known about the companion.
[11]
[12] The system is drifting closer to the Sun with a
radial velocity of −5 km/s.
[4]
The visible component is an
A-type
main sequence star with a
stellar classification of A1 V;
[3] a class of star that is still fusing hydrogen at its
core . It has around twice
[6] the mass and 2.2
[7] times the radius of the Sun, and is shining with 18.6 times the Sun's luminosity.
[8] The
effective temperature of the star's
outer atmosphere is 8,846 K. Psi Scorpii is around 451 million years old and is spinning with a
projected rotational velocity of 42.3 km/s.
[6]
References
^
a
b
c
d
e
f
Brown, A. G. A. ; et al. (Gaia collaboration) (August 2018).
"Gaia Data Release 2: Summary of the contents and survey properties" .
Astronomy & Astrophysics . 616 . A1.
arXiv :
1804.09365 .
Bibcode :
2018A&A...616A...1G .
doi :
10.1051/0004-6361/201833051 .
Gaia DR2 record for this source at
VizieR .
^
a
b
c
d Hoffleit, Dorrit; Jaschek, Carlos (1991), "The Bright star catalogue", New Haven, Conn.: Yale University Observatory, 5th Rev.ed. ,
Bibcode :
1991bsc..book.....H .
^
a
b Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5", Michigan Spectral Survey , 5 ,
Bibcode :
1999MSS...C05....0H .
^
a
b Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", Astronomy Letters , 32 (11): 759–771,
arXiv :
1606.08053 ,
Bibcode :
2006AstL...32..759G ,
doi :
10.1134/S1063773706110065 ,
S2CID
119231169 .
^ Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", Astronomy Letters , 38 (5): 331,
arXiv :
1108.4971 ,
Bibcode :
2012AstL...38..331A ,
doi :
10.1134/S1063773712050015 ,
S2CID
119257644 .
^
a
b
c
d
e
f David, Trevor J.; Hillenbrand, Lynne A. (2015), "The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets", The Astrophysical Journal , 804 (2): 146,
arXiv :
1501.03154 ,
Bibcode :
2015ApJ...804..146D ,
doi :
10.1088/0004-637X/804/2/146 ,
S2CID
33401607 .
^
a
b Pasinetti Fracassini, L. E.; et al. (2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics", Astronomy & Astrophysics , 367 (2): 521–24,
arXiv :
astro-ph/0012289 ,
Bibcode :
2001A&A...367..521P ,
doi :
10.1051/0004-6361:20000451 ,
S2CID
425754 .
^
a
b McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society , 427 (1): 343–57,
arXiv :
1208.2037 ,
Bibcode :
2012MNRAS.427..343M ,
doi :
10.1111/j.1365-2966.2012.21873.x ,
S2CID
118665352 .
^ Díaz, C. G.; et al. (July 2011), "Accurate stellar rotational velocities using the Fourier transform of the cross correlation maximum", Astronomy & Astrophysics , 531 : A143,
arXiv :
1012.4858 ,
Bibcode :
2011A&A...531A.143D ,
doi :
10.1051/0004-6361/201016386 ,
S2CID
119286673 .
^
"psi Sco -- Star" , SIMBAD Astronomical Database , Centre de Données astronomiques de Strasbourg, retrieved 2016-09-24 .
^ Frankowski, A.; et al. (March 2007), "Proper-motion binaries in the Hipparcos catalogue. Comparison with radial velocity data", Astronomy and Astrophysics , 464 (1): 377–392,
arXiv :
astro-ph/0612449 ,
Bibcode :
2007A&A...464..377F ,
doi :
10.1051/0004-6361:20065526 ,
S2CID
14010423 .
^ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society , 389 (2): 869–879,
arXiv :
0806.2878 ,
Bibcode :
2008MNRAS.389..869E ,
doi :
10.1111/j.1365-2966.2008.13596.x ,
S2CID
14878976 .
External links
Kaler, James B. (August 12, 2016),
"Chi and Psi Scorpii" , Stars , University of Illinois, retrieved 2016-09-25 .