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Star in the constellation Scorpius
This article is about i Scorpii. Not to be confused with
ι Scorpii .
22 Scorpii (i Scorpii) is a single
[7]
star in the southern
zodiac
constellation of
Scorpius , about one degree from
Antares . It is faintly visible to the naked eye with an
apparent visual magnitude of 4.78.
[2] The distance to this star is estimated to be around 410
light years , as derived from its annual
parallax shift of 7.89± 0.24
mas .
[1] The star is embedded in, or adjacent to, the diffuse nebulous cloud IC 4605 located in the western regions of the
Rho Ophiuchi cloud complex .
[8]
22 Scorpii in the IC 4605 reflection nebula, one of a collection of diffuse and dark nebulae in the
Rho Ophiuchi cloud complex . 22 Scorpii is a
B-type main-sequence star with a
stellar classification of B3 V.
[3] It is ten
[5] million years old and has a high rate of spin with a
projected rotational velocity of 169 km/s.
[2] The star has about six
[5] times the
mass of the Sun and is radiating 335
[4] times the
Sun's luminosity from its
photosphere at an
effective temperature of 19,600
K .
[2]
References
^
a
b
c
d
e
f van Leeuwen, F. (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
e
f Bragança, G. A.; et al. (November 2012), "Projected Rotational Velocities and Stellar Characterization of 350 B Stars in the Nearby Galactic Disk", The Astronomical Journal , 144 (5): 10,
arXiv :
1208.1674 ,
Bibcode :
2012AJ....144..130B ,
doi :
10.1088/0004-6256/144/5/130 ,
S2CID
118868235 , 130 .
^
a
b Houk, Nancy; Smith-Moore, M. (1978), Michigan catalogue of two-dimensional spectral types for the HD stars , vol. 4, Ann Arbor: Dept. of Astronomy, University of Michigan,
Bibcode :
1988mcts.book.....H .
^
a
b
c 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 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 .
^
"22 Sco" .
SIMBAD .
Centre de données astronomiques de Strasbourg . Retrieved 2018-03-16 .
^ 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 .
^ Padgett, Deborah L.; et al. (January 2008), "The Spitzer c2d Survey of Large, Nearby, Interstellar Clouds. VII. Ophiuchus Observed with MIPS", The Astrophysical Journal , 672 (2): 1013–1037,
arXiv :
0709.3492 ,
Bibcode :
2008ApJ...672.1013P ,
doi :
10.1086/523883 ,
S2CID
12396730 , 1013–1037 .
External links