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HD 77912

{{Short description|Star in the constellation Lynx}}

{{Starbox begin

| name = HD 77912

}}

{{Starbox observe

| epoch = J2000

| constell = Lynx

| ra = {{RA|09|06|31.76860}}

| dec = {{DEC|+38|27|07.9756}}

| appmag_v = 4.56

}}

{{Starbox character

| class = {{nowrap|G7 II Ba0.2}}

| b-v = {{Val|1.037|0.003}}

}}

{{Starbox astrometry

| radial_v = {{Val|+16.6|0.2}}

| prop_mo_ra = −27.653

| prop_mo_dec = −15.055

| parallax = 5.0045

| p_error = 0.1977

| parallax_footnote =

| absmag_v = {{Val|−1.46|0.093}}

}}

{{Starbox detail

| source =

| mass = 4.60

| radius = {{Val|33|5}}

| luminosity = 1,168.35

| gravity = 1.75

| temperature = 4,899

| metal_fe = −0.14

| rotational_velocity =

| age_myr =

}}

{{Starbox catalog

| names={{odlist | BD=+39°2200 | FK5=1237 | HD=77912 | HIP=44700 | HR=3612 | SAO=61254 }}

}}

{{Starbox reference

| Simbad = HD+77912

}}

{{Starbox end}}

HD 77912 is a single star in the northern constellation of Lynx. It is visible to the naked eye with an apparent visual magnitude of 4.56. The star is located 650 light years from the Sun, as determined from its annual parallax shift of {{Val|5.0|ul=mas}}. It is moving further away with a heliocentric radial velocity of +16.6 km/s. HD 77912 has a peculiar velocity of {{Val|23.1|2.9|1.1|u=km/s}}, which may mark it as a runaway star.

The stellar classification of HD 77912 is {{nowrap|G7 II Ba0.2}}, indicating it is a bright giant with a mild overabundance of barium. It has 4.6 times the mass of the Sun and has expanded to 33 times the Sun's radius. The star is radiating 1,168 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,899 K.

References

{{reflist|refs=

{{cite simbad | title=HD 77912 | access-date=2018-07-30 }}

{{cite DR2}}

{{citation

| title=A catalogue of multiplicity among bright stellar systems

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

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869 | date=2008

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | arxiv=0806.2878

| bibcode=2008MNRAS.389..869E | s2cid=14878976 | postscript=. }}

{{citation

| title=XHIP: An extended hipparcos compilation

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

| journal=Astronomy Letters

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

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 | postscript=. }}

{{citation | display-authors=1

| last1=Park | first1=Sunkyung | last2=Kang | first2=Wonseok

| last3=Lee | first3=Jeong-Eun | last4=Lee | first4=Sang-Gak

| title=Wilson-Bappu Effect: Extended to Surface Gravity

| journal=The Astronomical Journal

| volume=146 | issue=4 | pages=73 | year=2013

| doi=10.1088/0004-6256/146/4/73 | bibcode=2013AJ....146...73P

| arxiv=1307.0592 | s2cid=119187733 | postscript=. }}

{{citation | postscript=.

| title=Taxonomy of barium stars

| journal=Astronomical Journal

| last1=Lu | first1=Phillip K.

| volume=101 | pages=2229 | year=1991

| bibcode=1991AJ....101.2229L | doi=10.1086/115845 | doi-access=free}}

{{citation | postscript=.

| title=The Lithium Abundances of a Large Sample of Red Giants

| display-authors=1 | last1=Liu | first1=Y. J.

| last2=Tan | first2=K. F. | last3=Wang | first3=L.

| last4=Zhao | first4=G. | last5=Sato | first5=Bun'ei

| last6=Takeda | first6=Y. | last7=Li | first7=H. N.

| journal=The Astrophysical Journal | arxiv=1404.1687

| volume=785 | issue=2 | id=94 | pages=12 | date=April 2014

| doi=10.1088/0004-637X/785/2/94 | bibcode=2014ApJ...785...94L | s2cid=119226316

}}

{{citation

| display-authors=1 | last1=Tetzlaff | first1=N.

| last2=Neuhäuser | first2=R. | last3=Hohle | first3=M. M.

| title=A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun

| journal=Monthly Notices of the Royal Astronomical Society

| volume=410 | issue=1 | pages=190–200 | date=January 2011

| doi=10.1111/j.1365-2966.2010.17434.x | doi-access=free | bibcode=2011MNRAS.410..190T

| arxiv=1007.4883 | s2cid=118629873 | postscript=. }}

{{citation

| display-authors=1 | last1=Van Belle | first1=G. T.

| last2=Creech-Eakman | first2=M. J. | last3=Hart | first3=A.

| title=Supergiant temperatures and linear radii from near-infrared interferometry

| journal=Monthly Notices of the Royal Astronomical Society

| volume=394 | issue=4 | pages=1925 | year=2009

| doi=10.1111/j.1365-2966.2008.14146.x | doi-access=free | arxiv=0811.4239

| bibcode=2009MNRAS.394.1925V | s2cid=118372600 | postscript=. }}

}}

{{Stars of Lynx}}

Category:G-type bright giants

Category:Lynx (constellation)

Category:Durchmusterung objects

077912

044700

3612