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Star in the constellation Ophiuchus
μ Ophiuchi , Latinized as Mu Ophiuchi , is a solitary,
[10] blue-white hued
star in the
equatorial
constellation of
Ophiuchus . It is visible to the naked as a faint point of light with an
apparent visual magnitude of 4.62.
[2] This object is located approximately 760
light years away from the Sun based on
parallax ,
[5] but is drifting closer with a
radial velocity of −18.5 km/s.
[4]
This object has a
stellar classification of B8II-IIIp:Mn,
[3] showing a
luminosity class with mixed traits of a
giant or
bright giant star . The suffix notation indicates it is a candidate
chemically peculiar star with an overabundance of manganese in its
spectrum . It may be a
mercury-manganese star .
[11] This object has 11 times the
radius of the Sun and is radiating nearly 400 times the
Sun's luminosity from its
photosphere at an
effective temperature of 7,748 K.
[1] It is spinning with a
projected rotational velocity of 95 km/s.
[8]
In 2006, a new nearby
star cluster ,
Mamajek 2 (), was discovered. Mu Ophiuchi is a candidate member.
[12] The cluster has an estimated age of 120± 25 million years.
[13]
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 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues . 2237 .
Bibcode :
2002yCat.2237....0D .
^
a
b Cowley, A. (November 1972). "Spectral classification of the bright B8 stars". Astronomical Journal . 77 : 750–755.
Bibcode :
1972AJ.....77..750C .
doi :
10.1086/111348 .
^
a
b Gontcharov, G. A. (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 .
^
a
b
c
d 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 .
Vizier catalog entry
^ 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 .
Vizier catalog entry
^ Gontcharov, G. A. (2012). "Dependence of kinematics on the age of stars in the solar neighborhood". Astronomy Letters . 38 (12): 771–782.
arXiv :
1606.08814 .
Bibcode :
2012AstL...38..771G .
doi :
10.1134/S1063773712120031 .
S2CID
118345778 .
Vizier catalog entry
^
a
b Abt, Helmut A.; et al. (2002).
"Rotational Velocities of B Stars" . The Astrophysical Journal . 573 (1): 359–365.
Bibcode :
2002ApJ...573..359A .
doi :
10.1086/340590 .
^
"mu. Oph" .
SIMBAD .
Centre de données astronomiques de Strasbourg .
^ 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 .
^ Renson, P.; Manfroid, J. (May 2009).
"Catalogue of Ap, HgMn and Am stars" . Astronomy and Astrophysics . 498 (3): 961–966.
Bibcode :
2009A&A...498..961R .
doi :
10.1051/0004-6361/200810788 .
^ Mamajek, Eric E. (2006). "A New Nearby Candidate Star Cluster in Ophiuchus at d = 170 pc". Astronomical Journal . 132 (5): 2198–2205.
arXiv :
astro-ph/0609064 .
Bibcode :
2006AJ....132.2198M .
doi :
10.1086/508205 .
S2CID
14070978 .
^ Jilinski, E.; et al. (January 2009). "Dynamical Evolution and Spectral Characteristics of the Stellar Group Mamajek 2". The Astrophysical Journal . 691 (1): 212–218.
arXiv :
0810.1198 .
Bibcode :
2009ApJ...691..212J .
doi :
10.1088/0004-637X/691/1/212 .
S2CID
15570695 .