}}{{Starbox detail
| source = [5]
| mass = 1.37[6]
| radius = {{Val|22.06|1.38|3.16}}[1]
| luminosity = {{Val|163|4}}[1]
| temperature = {{Val|4314|80|fmt=commas}}
| gravity = {{Val|1.81|0.28}}
| metal_fe = {{Val|−0.71|0.12}}
| rotational_velocity =
| age_gyr = 4.58[6]
}}{{Starbox catalog
| names = {{odlist|B=b Piscium|F=7 Psc|BD=+04°4997|FK5=3871|HD=220009|HIP=115227|SAO=128126|HR=8878}}[7]
}}{{Starbox reference
| Simbad = 7+Psc
}}{{Starbox end}}7 Piscium is a single[18] star in the zodiac constellation of Pisces,[7] located around 343 light years away from the Sun.[1] It has the Bayer designation b Piscium; 7 Piscium is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 5.07.[2] It is moving further from the Earth with a heliocentric radial velocity of 40 km/s.[1]This is a metal-deficient giant star[8] with a stellar classification of K1 IV.[3] It is a red clump giant, which indicates it is on the horizontal branch and is generating energy through the fusion of helium at its core.[9] The star is 4.58 billion years old with 1.37 times the mass of the Sun.[6] It has 22[1] times the Sun's radius and is radiating 163[1] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,314 K.[5]
References
1. ^1 2 3 4 5 6 7 8 9 10 11 {{cite DR2|2661005953843811456}}
2. ^1 {{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author1=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}
3. ^1 {{cite journal|bibcode=1999MSS...C05....0H|title=Michigan catalogue of two-dimensional spectral types for the HD Stars, Vol. 5|journal=Michigan Spectral Survey|volume=5|author1=Houk, N.|author2=Swift, C.|year=1999}}
4. ^{{cite journal|title=UBVRIJKL Photometry of the Bright Stars|author1=Johnson, H. L.|journal=Communications of the Lunar and Planetary Laboratory|volume=4|pages=99|date=1966|bibcode=1966CoLPL...4...99J}}
5. ^1 {{citation | display-authors=1 | last1=Prugniel | first1=Ph. | last2=Vauglin | first2=I. | last3=Koleva | first3=M. | title=The atmospheric parameters and spectral interpolator for the MILES stars | journal=Astronomy & Astrophysics | volume=531 | page=A165 |date=July 2011 | doi=10.1051/0004-6361/201116769 | bibcode=2011A&A...531A.165P | postscript=. | arxiv=1104.4952 }}
6. ^1 2 {{citation | title=Abundances in the Local Region. I. G and K Giants | journal=The Astronomical Journal | last1=Luck | first1=R. Earle | volume=150 | issue=3 | pages=88 | year=2015 | bibcode=2015AJ....150...88L | doi=10.1088/0004-6256/150/3/88 | arxiv=1507.01466 | postscript=. }}
7. ^1 {{cite simbad | title=7 Psc | access-date=2019-03-25 }}
8. ^{{citation |doi=10.1051/0004-6361:20065867|title=Abundance analysis of barium and mild barium stars|first1=R.|last1=Smiljanic|first2=G. F.|last2=Porto de Mello|first3=L.|last3=da Silva|journal=Astronomy & Astrophysics|volume=468|issue=2|date=June 2007|pages=679–693|arxiv=astro-ph/0702421|bibcode = 2007A&A...468..679S }}
9. ^{{citation | last1=Alves | first1=David R. | title=K-Band Calibration of the Red Clump Luminosity | journal=The Astrophysical Journal | volume=539 | issue=2 | pages=732–741 | date=August 2000 | doi=10.1086/309278 | bibcode=2000ApJ...539..732A | arxiv=astro-ph/0003329 | postscript=. }}
10. ^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 | year=2008 | arxiv=0806.2878 | bibcode=2008MNRAS.389..869E | doi=10.1111/j.1365-2966.2008.13596.x | postscript=. }}