| 释义 |
- References
{{starbox begin
| name = 72 Leonis
}}{{Starbox observe
| epoch =J2000
| constell = Leo
| ra = {{RA|11|15|12.22709}}[1]
| dec = {{DEC|+23|05|43.8373}}[1]
| appmag_v = 4.63[3]
}}{{Starbox character
| type =
| class = M3 IIb[4]
| b-v = {{Val|1.657|0.003}}[5]
| u-b =
| variable = LC[6]
}}{{Starbox astrometry
| radial_v = {{Val|14.76|0.21}}[5]
| prop_mo_ra = −25.56[1]
| prop_mo_dec = −6.00[1]
| parallax = 3.40
| p_error = 0.65
| parallax_footnote = [1]
| absmag_v = −2.69[5]
}}{{Starbox detail
| source =
| mass =
| radius =
| luminosity = 5,406.85[12]
| temperature = {{Val|3734|238|fmt=commas}}[13]
| metal_fe =
| gravity =
| rotational_velocity =
| age_myr =
}}{{Starbox catalog
| names={{odlist | V=FN Leo | F=72 Leo | BD=+23° 2322 | FK5=2897 | HD=97778 | HIP=54951 | HR=4362 | SAO=81736 | AAVSO=1109+23 }}
}}{{Starbox reference
| Simbad=72+Leo
}}{{Starbox end}}72 Leonis is a single[15] variable star in the zodiac constellation of Leo, located roughly 1,000 light years away from the Sun.[1] It has the variable star designation FN Leonis; 72 Leonis is the Flamsteed designation. In Chinese astronomy, 72 Leonis is called 虎賁, Pinyin: Hǔbēn, meaning Emperor’s Bodyguard, because this star is marking itself and stands alone in the Emperor’s Bodyguard asterism, Supreme Palace enclosure mansion (see : Chinese constellation).[17]This object is visible to the naked eye as a red-hued star with an apparent visual magnitude of 4.56.[5] It is an evolved bright giant with a stellar classification of M3 IIb and was listed as a spectral standard star for that class.[4] The star is classified as an irregular variable of type LC, ranging from Hipparcos magnitude 4.56 down to 4.64.[6] It has a radius 162 to 179[21] times that of the Sun and radiates 5,407[12] times the Sun's luminosity at an effective temperature of around 3,734 K.[13] The star is moving away from the Earth with a heliocentric radial velocity of 15 km/s.[5] References1. ^1 2 {{citation | display-authors=1 | last1=Samus | first1=N. N. | last2=Kazarovets | first2=E. V. | last3=Durlevich | first3=O. V. | last4=Kireeva | first4=N. N. | last5=Pastukhova | first5=E. N. | title=General Catalogue of Variable Stars | version=5.1 | journal=Astronomy Reports | year=2017 | volume=61 | issue=1 | pages=80–88 | bibcode=2017ARep...61...80S | postscript=. }}
2. ^1 2 3 4 5 6 {{citation | title=Validation of the new Hipparcos reduction | last1=van Leeuwen | first1=F. | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | postscript=. }}
3. ^1 2 {{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 | pages=343 | year=2012 | postscript=. | doi=10.1111/j.1365-2966.2012.21873.x | bibcode=2012MNRAS.427..343M |arxiv = 1208.2037 }}
4. ^1 {{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 | date=September 2008 | doi=10.1111/j.1365-2966.2008.13596.x | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | postscript=. }}
5. ^1 2 {{citation | display-authors=1 | last1=Dyck | first1=H. M. | last2=Van Belle | first2=G. T. | last3=Thompson | first3=R. R. | title=Radii and Effective Temperatures for K and M Giants and Supergiants. II | journal=The Astronomical Journal | volume=116 | issue=2 | pages=981 | year=1998 | doi=10.1086/300453 | bibcode=1998AJ....116..981D | citeseerx=10.1.1.24.1889 | postscript=. }}
6. ^1 2 {{citation | last1=Keenan | first1=Philip C. | last2=McNeil | first2=Raymond C. | title=The Perkins catalog of revised MK types for the cooler stars | journal=Astrophysical Journal Supplement Series | volume=71 | pages=245 | year=1989 | postscript=. | bibcode=1989ApJS...71..245K | doi=10.1086/191373 }}
7. ^1 2 3 4 5 {{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 | arxiv=1108.4971 | doi=10.1134/S1063773712050015 | postscript=. }}
8. ^1 {{Citation | last1=Kaler | first1=James B. | title=72 Leonis | date=May 11, 2012 | website=stars.astro.illinois.edu | url=http://stars.astro.illinois.edu/sow/72leo.html | access-date=2017-10-09 | postscript=. }}
9. ^1 {{citation|url=http://www.ianridpath.com/startales/leo.htm |publisher=Ian Ridpath's Startales |title=Leo the Lion |accessdate=2019-02-10 | postscript=. }}
10. ^1 {{citation|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|author1=Ducati|first1=J. R.|year=2002 | postscript=. }}
}}{{Stars of Leo}} 9 : M-type bright giants|Slow irregular variables|Leo (constellation)|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects|Objects with variable star designations |