| 词条 | 74 Ophiuchi |
| 释义 |
| name = 74 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=74 Ophiuchi |x=168|y=312 }} |caption=Location of 74 Ophiuchi (circled) }}{{Starbox observe | epoch = J2000 | constell = Ophiuchus | ra = {{RA|18|20|52.06316}}[1] | dec = {{DEC|3|22|37.7994}}[1] | appmag_v = 4.85[2] }}{{Starbox character | class = G8III[3] | b-v = +0.91[4] | u-b = +0.61[4] }}{{Starbox astrometry | radial_v = +4.35[5] | prop_mo_ra = +1.79[1] | prop_mo_dec = +8.88[1] | parallax = 12.52 | p_error = 0.33 | parallax_footnote = [1] | absmag_v = 0.34[2] }}{{Starbox detail | mass = 2.38[6] | radius = 11.60[6] | temperature = 5,012[6] | luminosity = 76.3[6] | rotational_velocity = < 1.0[7] | gravity = 2.70[6] | metal_fe = -0.21[6] }}{{Starbox catalog | names = BD+03°3680, CCDM J18209+0323A, FK5 1476, GC 25036, HIP 89918, HR 6866, HD 168656, SAO 123377, WDS J18209+0323A }}{{Starbox reference | Simbad = 74+Ophiuchi }}{{Starbox end}}74 Ophiuchi is a class G8III[3] (yellow giant) star in the constellation Ophiuchus. Its apparent magnitude is 4.85[2] and it is approximately 261 light years away based on parallax.[1] The primary has two reported companions: B, with magnitude 12.08 and separation 27.5", and C, with magnitude 12.28 and separation 57.9".[8] References1. ^1 2 3 4 5 {{cite journal | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653 | year=2007 | last1=Van Leeuwen | first1=F. }} Vizier catalog entry {{Stars of Ophiuchus}}{{Giant-star-stub}}{{multi-star-stub}}2. ^1 2 {{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. }} Vizier catalog entry 3. ^1 {{cite journal | bibcode=1995yCat.5050....0H | title=VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991) | journal=VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H | volume=5050 | author1=Hoffleit | first1=D. | last2=Warren | first2=W. H. | year=1995 }} 4. ^1 {{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 | author1=Mallama | first1=A. | year=2014 }}Vizier catalog entry 5. ^{{cite journal | bibcode=2008AJ....135..209M | doi=10.1088/0004-6256/135/1/209 | title=Rotational and Radial Velocities for a Sample of 761 Hipparcos Giants and the Role of Binarity | journal=The Astronomical Journal | volume=135 | pages=209 | year=2008 | last1=Massarotti | first1=Alessandro | last2=Latham | first2=David W. | last3=Stefanik | first3=Robert P. | last4=Fogel | first4=Jeffrey }} 6. ^1 2 3 4 5 {{cite journal | arxiv=1412.4634 | bibcode=2015A&A...574A.116R | doi=10.1051/0004-6361/201322360 | title=Precise radial velocities of giant stars | journal=Astronomy & Astrophysics | volume=574 | pages=A116 | year=2015 | last1=Reffert | first1=Sabine | last2=Bergmann | first2=Christoph | last3=Quirrenbach | first3=Andreas | last4=Trifonov | first4=Trifon | last5=Künstler | first5=Andreas | hdl=10722/215277 }} Vizier catalog entry 7. ^{{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 }} Vizier catalog entry 8. ^{{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. }} Vizier catalog entry 7 : Ophiuchus (constellation)|G-type giants|Durchmusterung objects|Flamsteed objects|Hipparcos objects|HR objects|Henry Draper Catalogue objects |
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