74 Orionis

{{Short description|Single star in the constellation Orion}}

{{about-distinguish2|k Orionis|κ Orionis}}

{{Starbox begin}}

{{Starbox observe

| epoch = J2000

| constell = Orion

| ra = {{RA|06|16|26.61878}}{{Cite Gaia DR2|3331979901042416512}}

| dec = {{DEC|12|16|19.7909}}

| appmag_v = 5.04{{cite journal | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | title=XHIP: An extended hipparcos compilation | journal=Astronomy Letters | volume=38 | issue=5 | pages=331 | year=2012 | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | s2cid=119257644 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=V/137D/XHIP&HIP=29800 Vizier catalog entry]

}}

{{Starbox character

| type = main sequence

| class = F5V{{cite journal | doi=10.1086/378365 | bibcode=2003AJ....126.2048G |arxiv = astro-ph/0308182 | title=Contributions to the Nearby Stars (NStars) Project: Spectroscopy of Stars Earlier than M0 within 40 Parsecs: The Northern Sample. I | journal=The Astronomical Journal | volume=126 | issue=4 | pages=2048 | year=2003 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Robinson | first5=P. E. | s2cid=119417105 }}

| b-v = +0.42{{cite journal | bibcode=2014JAVSO..42..443M | title=Sloan Magnitudes for the Brightest Stars | journal=The Journal of the American Association of Variable Star Observers | volume=42 | pages=443 | last1=Mallama | first1=A. | year=2014 | issue=2 }}[http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/other/JAVSO/42.443/ugriz&HD=043386 Vizier catalog entry]

| u-b = -0.02

| variable =

}}

{{Starbox astrometry

| radial_v = +9.17{{cite journal | doi=10.1051/0004-6361/201014948 | bibcode=2010A&A...521A..12M | title=A spectroscopy study of nearby late-type stars, possible members of stellar kinematic groups | journal=Astronomy and Astrophysics | volume=521 | pages=A12 | year=2010 | last1=Maldonado | first1=J. | last2=Martínez-Arnáiz | first2=R. M. | last3=Eiroa | first3=C. | last4=Montes | first4=D. | last5=Montesinos | first5=B. |arxiv = 1007.1132 | s2cid=119209183 }}

| prop_mo_ra = +83.102

| prop_mo_dec = +186.263

| parallax = 51.1930

| p_error = 0.1907

| parallax_footnote =

| absmag_v = 3.62

}}

{{Starbox detail

| mass = 1.39

| radius = 1.3{{cite journal | bibcode=1999A&A...352..555A | arxiv=astro-ph/9911002 | title=Fundamental parameters of nearby stars from the comparison with evolutionary calculations: Masses, radii and effective temperatures | journal=Astronomy and Astrophysics | volume=352 | pages=555–562 | last1=Allende Prieto | first1=C. | last2=Lambert | first2=D. L. | year=1999 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bA/352/555/table1&Name=HIP29800 Vizier catalog entry]

| temperature = 6,595{{cite journal | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | s2cid=33401607 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/ApJ/804/146/table5&HIP=29800 Vizier catalog entry]

| luminosity = 3.02

| rotational_velocity = 18.8{{cite journal | bibcode=1999A&AS..139..433D | doi=10.1051/aas:1999401 | title=A catalog of rotational and radial velocities for evolved stars | journal=Astronomy and Astrophysics Supplement Series | volume=139 | issue=3 | pages=433 | year=1999 | last1=De Medeiros | first1=J. R. | last2=Mayor | first2=M. | arxiv=astro-ph/0608248 }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=J/A%2bAS/139/433/table5&Name=HD%2043386 Vizier catalog entry]

| gravity = 4.34

| metal_fe = -0.03

| age_gyr = 2.316

}}

{{Starbox catalog

| names = {{odlist | B=k Ori | F=74 Ori | BD=+12°1084 | FK5=1169 | GJ=9207 | HD=43386 | HIP=29800 | HR=2241 | SAO=95476 | CCDM=J06165+1216A | GC=8033 | LTT=11823 | WDS=J06164+1216A }}{{cite simbad | title=74 Ori | access-date=2019-08-08 }}

}}

{{Starbox reference

| Simbad = 74+Ori

}}

{{Starbox end}}

74 Orionis is a single{{citation | 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 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | postscript=. | arxiv=0806.2878 | date=September 2008| doi-access=free | s2cid=14878976 }} star in the equatorial constellation of Orion. It has the Bayer designation k Orionis, while 74 Orionis is the Flamsteed designation. This object is visible to the naked eye as a faint, yellow-white hued point of light with an apparent visual magnitude of 5.04. It is located at a distance of 64 light years from the Sun based on parallax, and is drifting further away with a radial velocity of +9 km/s. The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.204 arc seconds per annum.{{citation | last1=Lépine | first1=Sébastien | last2=Shara | first2=Michael M. | title=A Catalog of Northern Stars with Annual Proper Motions Larger than 0.15" (LSPM-NORTH Catalog) | journal=The Astronomical Journal | volume=129 | issue=3 | pages=1483–1522 | date=March 2005 | doi=10.1086/427854 | bibcode=2005AJ....129.1483L | arxiv=astro-ph/0412070 | s2cid=2603568 | postscript=. }}

This object is an ordinary F-type main-sequence star with a stellar classification of F5V. It is an estimated 2.3 billion years old and is spinning with a projected rotational velocity of 18.8 km/s. The star has 1.4 times the mass of the Sun and 1.3 times the Sun's radius. Metallicity is near solar, which indicates it has a Sun-like abundance of elements. The star is radiating three times the luminosity of the Sun from its photosphere at an effective temperature of 6,595 K.

74 Orionis has two visual companions: component B, with magnitude 12.5 and separation 32.1", and C, with magnitude 9.0 and separation 195.5".{{cite journal | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | volume=122 | issue=6 | pages=3466 | year=2001 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | doi-access=free }} [http://vizier.u-strasbg.fr/viz-bin/VizieR-4?-source=B/wds/wds&WDS=06164%2B1216 Vizier catalog entry]