mu Ophiuchi

{{Starbox image

| image =

{{Location mark

|image=Ophiuchus constellation map.svg|alt=|float=center|width=280

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=Mu Ophiuchi

|x=396|y=546

}}

| caption = Location of μ Ophiuchi (circled)

}}

{{Starbox observe

| epoch = J2000

| constell = Ophiuchus

| ra = {{RA|17|37|50.71308}}

| dec = {{DEC|-08|07|07.5749}}

| appmag_v = 4.62

}}

{{Starbox character

| type =

| class = B8II-IIIp:Mn

| b-v = +0.11

| u-b = −0.20

| variable =

}}

{{Starbox astrometry

| radial_v = −18.50

| prop_mo_ra = −11.31

| prop_mo_dec = −20.47

| parallax = 4.32

| p_error = 0.20

| parallax_footnote =

| absmag_v = −2.24

}}

{{Starbox detail

| mass =

| radius = {{Val|11.1|2.1|0.6}}

| gravity =

| age_gyr =

| metal_fe = +0.00

| temperature = {{Val|7748|210|651|fmt=commas}}

| luminosity = {{Val|398.7|26.8}}

| rotational_velocity = 95

}}

{{Starbox catalog

| names = {{odlist | B=μ Oph | BD=-08°4472 | F=57 Ophiuchi | FK5=3399 | HD=159975 | HIP=86284 | HR=6567 | SAO=141772 | GC=23889 }}

}}

{{Starbox reference

| Simbad = mu.+Oph

}}

μ Ophiuchi, Latinized as Mu Ophiuchi, is a solitary, 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. This object is located approximately 760 light years away from the Sun based on parallax, but is drifting closer with a radial velocity of −18.5 km/s.

This object has a stellar classification of B8II-IIIp:Mn, 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. 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. It is spinning with a projected rotational velocity of 95 km/s.

In 2006, a new nearby star cluster, Mamajek 2 ({{IPAc-en|'|m|æ|m|@|dZ|E|k}}), was discovered. Mu Ophiuchi is a candidate member. The cluster has an estimated age of {{Val|120|25}} million years.

References

{{reflist|refs=

{{cite journal

| title=Dynamical Evolution and Spectral Characteristics of the Stellar Group Mamajek 2

| display-authors=1 | last1=Jilinski | first1=E.

| last2=Ortega | first2=V. G. | last3=de la Reza | first3=R.

| last4=Drake | first4=N. A. | last5=Bazzanella | first5=B.

| journal=The Astrophysical Journal

| volume=691 | issue=1 | pages=212–218 | date=January 2009

| doi=10.1088/0004-637X/691/1/212 | bibcode=2009ApJ...691..212J | arxiv=0810.1198 | s2cid=15570695 }}

{{cite journal

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008

| bibcode=2008MNRAS.389..869E | arxiv=0806.2878

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 }}

{{cite journal

| title=Spectral classification of the bright B8 stars.

| last=Cowley | first=A.

| journal=Astronomical Journal

| volume=77 | pages=750–755 | date=November 1972

| doi=10.1086/111348 | bibcode=1972AJ.....77..750C }}

{{cite journal

| title=Validation of the new Hipparcos reduction

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | year=2007

| last1=Van Leeuwen | first1=F.

| arxiv=0708.1752 | bibcode=2007A&A...474..653V

| doi=10.1051/0004-6361:20078357

| s2cid=18759600

}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-S?HIP%2086284 Vizier catalog entry]

{{cite journal

| title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system

| journal=CDS/ADC Collection of Electronic Catalogues

| volume=2237 | last=Ducati | first=J. R. | year=2002

| bibcode=2002yCat.2237....0D }}

{{Cite journal

| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system

| journal=Astronomy Letters

| volume=32 | issue=11 | pages=759–771 | year=2006

| last1=Gontcharov | first1=G. A.

| bibcode=2006AstL...32..759G | arxiv=1606.08053

| doi=10.1134/S1063773706110065 | s2cid=119231169

}}

{{cite journal

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| title=XHIP: An extended hipparcos compilation

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | arxiv=1108.4971

| doi=10.1134/S1063773712050015

| s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=86284 Vizier catalog entry]

{{cite journal

| display-authors=1 | last1=Abt | first1=Helmut A.

| last2=Levato | first2=Hugo | last3=Grosso | first3=Monica

| title=Rotational Velocities of B Stars

| journal=The Astrophysical Journal

| volume=573 | pages=359–365 | year=2002

| issue=1 | bibcode=2002ApJ...573..359A | doi=10.1086/340590 | doi-access=free }}

{{cite journal

| last1=Gontcharov | first1=G. A.

| title=Dependence of kinematics on the age of stars in the solar neighborhood

| journal=Astronomy Letters

| volume=38 | issue=12 | pages=771–782 | year=2012

| bibcode=2012AstL...38..771G | arxiv=1606.08814

| doi=10.1134/S1063773712120031

| s2cid=118345778

}} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/PAZh/38/860/thin&HIP=86284 Vizier catalog entry]

{{cite journal

| title=A New Nearby Candidate Star Cluster in Ophiuchus at d = 170 pc

| last=Mamajek | first=Eric E.

| journal=Astronomical Journal

| volume=132 | issue=5 | pages=2198–2205 | date=2006

| doi=10.1086/508205 | arxiv=astro-ph/0609064

| bibcode=2006AJ....132.2198M | s2cid=14070978 }}

{{cite journal

| last1=Renson | first1=P. | last2=Manfroid | first2=J.

| title=Catalogue of Ap, HgMn and Am stars

| journal=Astronomy and Astrophysics

| volume=498 | issue=3 | pages=961–966 | date=May 2009

| doi=10.1051/0004-6361/200810788 | bibcode=2009A&A...498..961R | doi-access=free }}

}}

Category:B-type bright giants

Category:B-type giants