101 Piscium

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title: "101 Piscium" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["b-type-giants", "suspected-variables", "pisces-(constellation)", "durchmusterung-objects", "flamsteed-objects", "henry-draper-catalogue-objects", "hipparcos-objects", "bright-star-catalogue-objects"] description: "Blue giant star in the constellation Pisces" topic_path: "general/b-type-giants" source: "https://en.wikipedia.org/wiki/101_Piscium" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Blue giant star in the constellation Pisces ::

| epoch = J2000.0 (ICRS) | constell = Pisces | ra = | dec = | appmag_v = 6.23 | type = | class = B9.5 III | b-v = | u-b = −0.151 | variable = | radial_v = −10.10 | prop_mo_ra = +3.287 | prop_mo_dec = −8.052 | parallax = 2.3343 | p_error = 0.0663 | parallax_footnote = | absmag_v = −2.07 | source = | mass = | radius = 3.6 | luminosity = | temperature = | metal_fe = | gravity = | rotational_velocity = 246 | age_gyr = | names = | Simbad = 101+Psc

101 Piscium is a star in the zodiac constellation of Pisces, located around 1,400 light years away from the Sun. This appears as a dim, blue-white hued star near the lower limit of visibility to the naked eye at an apparent visual magnitude of 6.23. It is a suspected variable star with the designation NSV 559; 101 Piscium is the Flamsteed designation. The star is moving closer to the Earth with a heliocentric radial velocity of −10 km/s.

This object has a stellar classification of B9.5 III, matching a giant star that has consumed the hydrogen at its core and is evolving away from the main sequence. It is spinning rapidly with a projected rotational velocity of 246 km/s, compared to a critical velocity of 270 km/s. The star has 4.5 times the mass of the Sun and about 3.6 times the Sun's radius. It is radiating around 1,000 times the luminosity of the Sun from its photosphere at an effective temperature of 10,471 K.

References

| title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644 }}

| last1=Cowley | first1=A. | last2=Cowley | first2=C. | last3=Jaschek | first3=M. | last4=Jaschek | first4=C. | title=A study of the bright A stars. I. A catalogue of spectral classifications | display-authors=1 | journal=Astronomical Journal | volume=74 | pages=375–406 | date=April 1969 | doi=10.1086/110819 | bibcode=1969AJ.....74..375C }}

| display-authors=1 | last1=Gutierrez-Moreno | first1=Adelina | last2=Moreno | first2=H. | last3=Stock | first3=J. | last4=Torres | first4=C. | last5=Wroblewski | first5=H. | title=A System of photometric standards | journal=Publications of the Department of Astronomy University of Chile | publisher=Publicaciones Universidad de Chile, Department de Astronomy | volume=1 | pages=1–17 | year=1966 | bibcode=1966PDAUC...1....1G }}

| last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32 | issue=11 | pages=759–771 | date=2006 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | doi=10.1134/S1063773706110065 | s2cid=119231169

| last1=Zorec | first1=J. | last2=Royer | first2=F. | last3=Asplund | first3=Martin | last4=Cassisi | first4=Santi | last5=Ramirez | first5=Ivan | last6=Melendez | first6=Jorge | last7=Bensby | first7=Thomas | last8=Feltzing | first8=Sofia | title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities | display-authors=1 | journal=Astronomy and Astrophysics | volume=537 | pages=A120 | year=2012 | bibcode=2012A&A...537A.120Z | arxiv=1201.2052 | doi=10.1051/0004-6361/201117691 | s2cid=55586789 }}

| title=A Stellar Rotation Census of B Stars: From ZAMS to TAMS | display-authors=1 | last1=Huang | first1=W. | last2=Gies | first2=D. R. | last3=McSwain | first3=M. V. | journal=The Astrophysical Journal | volume=722 | issue=1 | pages=605–619 | year=2010 | bibcode=2010ApJ...722..605H| doi=10.1088/0004-637X/722/1/605 | arxiv=1008.1761 | s2cid=118532653 }}

| last1=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L. | last3=Covino | first3=S. | last4=Pozzi | first4=A. | title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) | edition=Third | journal=Astronomy and Astrophysics | volume=367 | pages=521–524 | date=February 2001 | doi=10.1051/0004-6361:20000451 | bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 }}

| 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 | doi=10.1134/S1063772917010085 | s2cid=125853869 }}

References

1. {{cite DR2. 2588869916522870144
2. "35 Psc".

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