11 Arietis

{{Starbox begin

| name = 11 Arietis

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|02|06|49.23558}}

| dec = {{DEC|+25|42|16.3939}}

| appmag_v = 6.01

| constell = Aries

}}

{{Starbox character

| class = B9 IV-Vn

| r-i =

| v-r =

| b-v = –0.04

| u-b = –0.26

| variable =

}}

{{Starbox astrometry

| radial_v = –9

| prop_mo_ra = +19.46

| prop_mo_dec = –14.31

| parallax = 3.72

| p_error = 0.38

| parallax_footnote =

| absmag_v =

}}

{{Starbox detail

| mass =

| radius = 2.8

| luminosity =

| temperature =

| metal_fe =

| rotational_velocity = 249

| age_myr =

}}

{{Starbox catalog

| names = BD+25° 349, HD 12885, HIP 9859, HR 615, SAO 75149.

}}

{{Starbox reference

|Simbad=11+Ari

}}

11 Arietis (abbreviated 11 Ari) is a star in the northern constellation of Aries. 11 Arietis is the Flamsteed designation. It has an apparent visual magnitude of 6.01, which makes it a challenging target to view with the naked eye in suitably dark skies. Based upon an annual parallax shift of 3.72 mas, the distance to this star is approximately {{Convert|880|ly|pc|abbr=off|lk=on}}.

11 Arietis has a stellar classification of B9 IV-Vn, which may indicate that it is beginning to evolve away from the main sequence into a subgiant as the supply of hydrogen at its core becomes exhausted. At present, it has an estimated radius of 2.8 times that of the Sun, but this will increase as it continues to evolve into a giant star. 11 Arietis is spinning rapidly with a projected rotational velocity of 249 km/s. This motion, combined with the Doppler effect, is causing the absorption lines in the spectrum to spread out and become 'nebulous', as indicated by the 'n' suffix in the classification.

References

{{reflist|refs=

{{citation | first=F. | last=van Leeuwen |date=November 2007| title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}

{{citation | last1=Cowley | first1=A. | title=Spectral classification of the bright B8 stars | journal=Astronomical Journal | volume=77 | pages=750–755 | doi=10.1086/111348 | bibcode=1972AJ.....77..750C | postscript=. |date=November 1972}}

{{citation | last=Wilson | first=Ralph Elmer | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institution of Washington | location=Washington | bibcode=1953GCRV..C......0W | postscript=. }}

{{citation | last1=Royer | first1=F. | last2=Zorec | first2=J. | last3=Gómez | first3=A. E. | title=Rotational velocities of A-type stars. III. Velocity distributions | journal=Astronomy and Astrophysics | volume=463 | issue=2 | pages=671–682 | doi=10.1051/0004-6361:20065224 | bibcode=2007A&A...463..671R | arxiv=astro-ph/0610785 | postscript=. |date=February 2007| s2cid=18475298 }}

{{citation | last1=Crawford | first1=D. L. | title=U, b, v, and Hβ Photometry for the Bright B8- and B9-TYPE Stars | journal=Astrophysical Journal | volume=137 | page=530 | doi=10.1086/147526 | bibcode=1963ApJ...137..530C | postscript=. |date=February 1963| doi-access=free }}

{{citation | display-authors=1 | last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics | journal=Astronomy and Astrophysics | volume=367 | pages=521–524 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | postscript=. |date=February 2001| issue=2 | s2cid=425754 }}

{{citation | display-authors=1 | last1=Høg | first1=E. | last2=Fabricius | first2=C. | last3=Makarov | first3=V. V. | last4=Urban | first4=S. | last5=Corbin | first5=T. | last6=Wycoff | first6=G. | last7=Bastian | first7=U. | last8=Schwekendiek | first8=P. | last9=Wicenec | first9=A. | title=The Tycho-2 catalogue of the 2.5 million brightest stars | journal=Astronomy and Astrophysics | volume=355 | pages=L27–L30 |date=March 2000| bibcode=2000A&A...355L..27H | postscript=. | doi=10.1888/0333750888/2862}}

}}

External links

[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%20615 HR 615]
[http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J02068%2b2542AB CCDM J02068+2542]
[http://aladin.u-strasbg.fr/AladinPreview?-c=02+06+49.2350%2B25+42+16.393&ident=CCDM+J02068%2B2542AB&submit=Aladin+previewer Image 11 Arietis]

Category:B-type main-sequence stars

012885

Arietis, 11

009859

Category:Aries (constellation)

0615

Category:Durchmusterung objects