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词条 Nu Caeli
释义

  1. References

  2. External links

{{Disputed title|alternate title=HD 30985|section=Name|date=September 2017}}{{Starbox begin
| name = Nu Caeli
}}{{Starbox observe
| epoch = J2000.0
| equinox = J2000.0 (ICRS)
| constell = Caelum
| ra = {{RA|04|50|16.18081}}
| dec = {{DEC|−41|19|15.0550}}
| appmag_v = 6.07[3]
}}{{Starbox character
| class = F2/3 V[4] or F1 III-IV[5]
| b-v = +0.37[3]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = {{Val|+23.8|0.8}}[7]
| prop_mo_ra = −3.11
| prop_mo_dec = +66.37
| parallax = 19.03
| p_error = 0.32
| parallax_footnote =
| absmag_v = +2.46[11]
}}{{Starbox detail
| source =
| mass = 1.34[12]
| radius =
| luminosity = 8.25[13]
| temperature = {{Val|6870|234|fmt=commas}}[12]
| gravity = {{Val|4.20|0.14}}[12]
| metal_fe = −0.11[16]
| rotational_velocity =
| age_myr = 880[12]
}}{{Starbox catalog
| names = {{odlist | B=ν Cae | CD=−41° 1593 | HD=30985 | HIP=22488 | HR=1557 | SAO=217032 | CCDM=04503-4119 | GC=5913 }}[18]
}}{{Starbox reference
| Simbad = HD+30985
}}{{Starbox end}}

Nu Caeli (ν Caeli) is a yellow-white hued star in the constellation Caelum. It has an apparent visual magnitude of 6.07,[3] which indicates it is near the lower limit on brightness that is visible to the naked eye. According to the Bortle scale, the star can be viewed from dark suburban skies. Based upon an annual parallax shift of 19.03 mas as seen from Earth, this star is located about 171 light years from the Sun.

Houk (1978) listed a stellar classification of F2/3 V for Nu Caeli,[4] which would indicate this is an F-type main-sequence star.[4] In contrast, Malaroda (1975) assigned in to class F1 III-IV,[5] which would suggest it is a more evolved F-type subgiant/giant transitional hydrid. It is an estimated 880 million years old with 1.34 times the mass of the Sun.[12] The star is radiating eight[13] times the Sun's luminosity from its photosphere at an effective temperature of 6,870 K.[12]

References

1. ^{{citation | display-authors=1 | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | journal=Astronomy and Astrophysics | volume=501 | issue=3 |date=July 2009 | pages=941–947 | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H | arxiv=0811.3982 | postscript=. }}
2. ^{{citation | last1=Casagrande | first1=L. | last2=Schönrich | first2=R. | last3=Asplund | first3=M. | last4=Cassisi | first4=S. | last5=Ramírez | first5=I. | last6=Meléndez | first6=J. | last7=Bensby | first7=T. | last8=Feltzing | first8=S. | title=New constraints on the chemical evolution of the solar neighbourhood and Galactic disc(s). Improved astrophysical parameters for the Geneva-Copenhagen Survey | journal=Astronomy & Astrophysics | display-authors=1 | volume=530 | issue=A138 | pages=21 | date=2011 | doi=10.1051/0004-6361/201016276 | bibcode=2011A&A...530A.138C | arxiv=1103.4651 | postscript=. }}
3. ^{{citation | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | doi=10.1111/j.1365-2966.2012.21873.x | arxiv=1208.2037 | postscript=. }}
4. ^{{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=. }}
5. ^{{citation | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | 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 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | postscript=. }}
6. ^{{citation | last=Malaroda | first=S. | title=Study of the F-type stars. I. MK spectral types | journal=Astronomical Journal | postscript=. | volume=80 | pages=637–641 |date=August 1975 | doi=10.1086/111786 | bibcode=1975AJ.....80..637M }}
7. ^{{citation | last1=Houk | first1=N. | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | date=1978 | postscript=. | publisher=Dept. of Astronomy, University of Michigan | bibcode=1978mcts.book.....H }}
8. ^{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | year=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}
9. ^{{cite simbad | title=HD 30985 | accessdate=2017-09-09 | postscript=. }}
[1][2][3][4][5][6][7][8][9]
}}

External links

  • HR 1557
  • CCDM J04503-4119
  • Image Nu Caeli
  • http://server3.wikisky.org/starview?object_type=1&object_id=5632
{{Stars of Caelum|state=collapsed}}

9 : F-type main-sequence stars|F-type subgiants|F-type giants|Bayer objects|Caelum|Durchmusterung objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects

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