| 释义 |
- References
{{Starbox begin
| name = 47 Aquarii
}}{{Starbox observe
| epoch = J2000
| constell = Aquarius
| ra = {{RA|22|21|35.56816}}[1]
| dec = {{DEC|−21|35|53.6431}}[1]
| appmag_v = 5.135[3]
}}{{Starbox character
| class = K0 III[4]
| b-v = 1.054[3]
| u-b =
| variable =
}}{{Starbox astrometry
| radial_v = +48.2[3]
| prop_mo_ra = −10.986[1]
| prop_mo_dec = −83.914[1]
| parallax = 18.0015
| p_error = 0.1709
| parallax_footnote = [1]
| absmag_v = +1.52[10]
}}{{Starbox detail
| source = [11]
| mass = 1.35
| radius = 7.86
| luminosity = 30
| temperature = 4,750
| metal_fe = {{Val|−0.18|0.08}}
| gravity = 2.69
| rotational_velocity = 1.43
| age_gyr = 2.4[3]
}}{{Starbox catalog
| names = {{odlist | f=47 Aqr | BD=−22° 5897 | FK5=1584 | HD=212010 | HIP=110391 | HR=8516 | SAO=191083 }}
}}{{Starbox reference
| Simbad = 47+Aqr
}}{{Starbox end}}47 Aquarii, abbreviated 47 Aqr, is a star in the zodiac constellation of Aquarius. 47 Aquarii is its Flamsteed designation. It is a faint star but visible to the naked eye in good seeing conditions, having an apparent visual magnitude of 5.135.[3] Based upon an annual parallax shift of {{Val|18.0|ul=mas}},[1] it is located 181 light years away. At that distance, the visual magnitude of the star is diminished by an extinction of 0.088 due to interstellar dust.[11] It is moving further from the Earth with a heliocentric radial velocity of +48 km/s.[3]This is an evolved giant star currently on the red giant branch[11] with a stellar classification of K0 III.[4] The star has 1.35 times the mass of the Sun and has expanded to 7.86 times the Sun's radius. It is radiating 30 times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,750 K.[11] References1. ^1 2 3 4 5 6 {{cite DR2}}
2. ^1 {{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 | doi=10.1134/S1063773712050015 | arxiv=1108.4971 | postscript=. }}
3. ^1 2 3 4 5 6 {{citation | title=Abundances in the Local Region. I. G and K Giants | last1=Luck | first1=R. Earle | journal=Astronomical Journal | postscript=. | volume=150 | issue=3 | at=88 | year=2015 | arxiv=1507.01466 | bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 }}
4. ^1 2 3 4 {{citation | title=Study of the impact of the post-MS evolution of the host star on the orbits of close-in planets. I. Sample definition and physical properties | last1=Jones | first1=M. I. | last2=Jenkins | first2=J. S. | last3=Rojo | first3=P. | last4=Melo | first4=C. H. F. | journal=Astronomy & Astrophysics | display-authors=1 | volume=536 | id=A71 | pages=7 | date=December 2011 | doi=10.1051/0004-6361/201117887 | bibcode=2011A&A...536A..71J | arxiv=1110.6459 | postscript=. }}
5. ^1 2 {{citation | last1=Houk | first1=Nancy | last2=Smith-Moore | first2=M. | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=4 | location=Ann Arbor | year=1978 | publisher=Dept. of Astronomy, University of Michigan | bibcode=1988mcts.book.....H | postscript=. }}
}}{{Stars of Aquarius}} 7 : K-type giants|Aquarius (constellation)|Durchmusterung objects|Flamsteed objects|Henry Draper Catalogue objects|Hipparcos objects|HR objects |