| 释义 |
- Naming
- References
{{Starbox begin
| name = Upsilon Ursae Majoris
}}{{Starbox image
| image =
| caption=Location of υ Ursae Majoris (circled)
}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Ursa Major
| ra = {{RA|09|50|59.35700}}
| dec = {{DEC|+59|02|19.4486}}
| appmag_v = 3.68 – 3.86[3]
}}{{Starbox character
| class = F2 IV[4]
| b-v = +0.29[5]
| u-b = +0.09[5]
| r-i =
| variable = δ Sct[3]
}}{{Starbox astrometry
| radial_v = {{Val|27.3|4.1}}[8]
| prop_mo_ra = +42.97
| prop_mo_dec = −23.62
| parallax = 28.06
| p_error = 0.20
| parallax_footnote =
| absmag_v = +1.11[12]
}}{{Starbox detail
| source =
| component1 = υ UMa A
| mass = 1.57[13] or 2.20[4]
| radius = {{Val|2.79|0.40}}[15]
| luminosity = 29.5[16]
| temperature = {{Val|7211|245|fmt=commas}}[13]
| gravity = {{Val|3.79|0.14}}[13]
| metal_fe =
| rotational_velocity = 124.2[19]
| rotation = {{Val|1.2|0.30|u=days}}[15]
| age_gyr = 1.168[13]
| component2 = υ UMa B
| mass2 = 0.44[4]
}}{{Starbox catalog
| names = υ UMa, 29 Ursae Majoris, BD+59°1268, FK5 368, HD 84999, HIP 48319, HR 3888, SAO 27401, WDS J09510+5902A[23]
}}{{Starbox reference
| Simbad = ups+UMa
}}{{Starbox end}}Upsilon Ursae Majoris (υ UMa) is the Bayer designation for a binary star[24] in the northern circumpolar constellation of Ursa Major. It is visible to the naked eye with an apparent visual magnitude of +3.79.[5] Based upon an annual parallax shift of 13.24 mas,[ it is located roughly 246 light years from the Sun.] The primary member of the system, component A, is an F-type subgiant star. It is a Delta Scuti variable[15] with a period of 0.1327 days and an amplitude of 0.050 magnitude.[28] With an estimated age of 1.168[13] billion years, it is spinning rapidly with a projected rotational velocity of 124.2 km/s[19] and a rotation period of 1.2 days.[15] The star has about 1.57[13] times the mass of the Sun and 2.79[15] times the Sun's radius. (De Rosa and colleagues give a mass estimate of 2.20[4] times the Sun's mass.) It is radiating around 29.5[16] times the solar luminosity from its outer atmosphere at an effective temperature of 7,211 K.[13] The companion, component B, is a magnitude +11.0 star.[24] As of 2008, it has an angular separation of 11.78 arc seconds along a position angle of 295.4°. This corresponds to a projected separation of 419.8 AU.[4] It has a mass around 40% that of the Sun.[4] Naming- With τ, h, φ, θ, e, and f, it composed the Arabic asterism Sarīr Banāt al-Na'sh, the Throne of the daughters of Na'sh, and Al-Haud, the Pond[40]. According to the catalogue of stars in the Technical Memorandum 33-507 - A Reduced Star Catalog Containing 537 Named Stars, Al-Haud were the title for seven stars : f as Alhaud I, τ as Alhaud II, e as Alhaud III, h as Alhaud IV, θ as Alhaud V, this star (υ) as Alhaud VI and φ as Alhaud VII .[41]
- In Chinese, {{lang|zh|文昌}} ({{lang|zh-Latn|Wén Chāng}}), meaning Administrative Center, refers to an asterism consisting of υ Ursae Majoris, φ Ursae Majoris, θ Ursae Majoris, 15 Ursae Majoris and 18 Ursae Majoris. Consequently, υ Ursae Majoris itself is known as {{lang|zh|文昌一}} ({{lang|zh-Latn|Wén Chāng yī}}, {{lang-en|the first Star of Administrative Center}}.).[1]
References1. ^{{zh icon}} AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 16 日
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3. ^1 2 3 4 5 {{citation | title=Nightly variations of nonradial oscillations in the Delta Scuti star upsilon Ursae Majoris | display-authors=1 | last1=Korzennik | first1=S. G. | last2=Noyes | first2=R. W. | last3=Brown | first3=T. | last4=Nisenson | first4=P. | last5=Horner | first5=S. | journal=Astrophysical Journal, Part 2 | postscript=. | volume=443 | issue=1 | pages=L25–L28 | date=April 1995 | doi=10.1086/187827 | bibcode=1995ApJ...443L..25K }}
4. ^1 {{citation | display-authors=1 | last1=Rodríguez | first1=E. | last2=López-González | first2=M. J. | last3=López de Coca | first3=P. | title=A revised catalogue of delta Sct stars | journal=Astronomy and Astrophysics Supplement | volume=144 | pages=469–474 | date=June 2000 | postscript=. | doi=10.1051/aas:2000221 | bibcode=2000A&AS..144..469R }}
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6. ^1 {{citation | last1=de Bruijne | first1=J. H. J. | last2=Eilers | first2=A.-C. | title=Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project | journal=Astronomy & Astrophysics | volume=546 | id=A61 | pages=14 | date=October 2012 | doi=10.1051/0004-6361/201219219 | bibcode=2012A&A...546A..61D | arxiv=1208.3048 | postscript=. }}
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8. ^1 2 3 4 5 6 {{citation | last1=De Rosa | first1=R. J. | last2=Patience | first2=J. | last3=Wilson | first3=P. A. | last4=Schneider | first4=A. | last5=Wiktorowicz | first5=S. J. | last6=Vigan | first6=A. | last7=Marois | first7=C. | last8=Song | first8=I. | last9=MacIntosh | first9=B. | last10=Graham | first10=J. R. | last11=Doyon | first11=R. | last12=Bessell | first12=M. S. | last13=Thomas | first13=S. | last14=Lai | first14=O. | title=The VAST Survey – III. The multiplicity of A-type stars within 75 pc | journal=Monthly Notices of the Royal Astronomical Society | volume=437 | issue=2 | pages=1216 | year=2013 | display-authors=1 | bibcode=2014MNRAS.437.1216D | doi=10.1093/mnras/stt1932 | arxiv=1311.7141 | postscript=. }}
9. ^1 2 {{citation | last1=Schröder | first1=C. | last2=Reiners | first2=A. | last3=Schmitt | first3=J. H. M. M. | title=Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo | journal=Astronomy and Astrophysics | volume=493 | issue=3 | pages=1099–1107 | date=January 2009 | doi=10.1051/0004-6361:200810377 | bibcode=2009A&A...493.1099S | postscript=. | url=http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2}}
10. ^1 2 3 {{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV data | year=1986 | publisher=SIMBAD | bibcode=1986EgUBV........0M | postscript=. }}
11. ^1 {{citation | title=Star-Names and Their Meanings | last=Allen | first=Richard Hinckley | authorlink=Richard Hinckley Allen | year=1899 | publisher=G. E. Stechert | postscript=. | publication-place=New York | page=442 }}
12. ^1 2 {{citation | last1=Balona | first1=L. A. | last2=Dziembowski | first2=W. A. | title=Excitation and visibility of high-degree modes in stars | journal=Monthly Notices of the Royal Astronomical Society | volume=309 | issue=1 | pages=221–232 | date=October 1999 | postscript=. | doi=10.1046/j.1365-8711.1999.02821.x | bibcode=1999MNRAS.309..221B }}
13. ^1 {{citation | url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19720005197_1972005197.pdf | first1=Jack W. | last1=Rhoads | title=Technical Memorandum 33-507-A Reduced Star Catalog Containing 537 Named Stars | publisher=Jet Propulsion Laboratory, California Institute of Technology | date=November 15, 1971 | postscript=. }}
14. ^1 {{cite simbad | title=ups UMa | access-date=2017-02-22 | postscript=. }}
15. ^1 2 {{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007–2013)|journal=VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S|volume=1|display-authors=etal|author1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}
}}{{Stars of Ursa Major|state=collapsed}} 10 : F-type subgiants|Delta Scuti variables|Binary stars|Ursa Major (constellation)|Bayer objects|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |