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HR 515

{{short description|Star in the constellation Pisces}}

{{Starbox begin}}

{{Starbox image

| image = 250px

| caption = Light curves for VY Piscium, adapted from Valtier et al. (1974). The vertical scale is hundredths of a magnitude.

}}

{{Starbox observe

| epoch = J2000

| constell = Pisces

| ra = {{RA|01|46|35.29855}}

| dec = {{DEC|+17|24|45.7125}}

| appmag_v = 6.54 - 6.59

}}

{{Starbox character

| type =

| class = A8 III or F0V

| b-v = {{Val|0.256|0.010}}

| u-b =

| variable = δ Sct

}}

{{Starbox astrometry

| radial_v = {{Val|−1.0|4.4}}

| prop_mo_ra = +49.315

| prop_mo_dec = +3.096

| parallax = 6.4827

| p_error = 0.1220

| parallax_footnote =

| absmag_v = +0.84

}}

{{Starbox detail

| source =

| mass = 1.7

| radius = 4.7

| luminosity = 60

| gravity = 3.32

| temperature = 7,401

| metal_fe = −0.02

| rotational_velocity = 96

| age_myr = 944

}}

{{Starbox catalog

| names = {{odlist | V=VY Psc | F=3 Arietis | BD=+16°196 | HD=10845 | HIP=8271 | HR=515 | SAO=92622 }}

}}

{{Starbox reference

| Simbad = V*+VY+Psc

}}

{{Starbox end}}

HR 515 is a variable star in the zodiac constellation of Pisces, near the eastern constellation border with Aries. Before the constellation borders were officially set, it held the Flamsteed designation of 3 Arietis, abbreviated 3 Ari). This star has the variable star designation VY Piscium, or VY Psc for short. It is a white-hued star that is near the lower limit of visibility to the naked eye with an apparent visual magnitude that ranges from 6.54 down to 6.59. Parallax measurements provide a distance estimate of approximately 503 light years from the Sun.

Gray and associates (1989) found a stellar classification of A8 III for this object, matching an evolved A-type giant star. Abt and Morrell (1995) listed a class of F0V, suggesting it is an F-type main-sequence star. It is a Delta Scuti variable whose brightness varies between magnitudes 6.54 and 6.59 with a period of 0.219 days. The star shows a high rate of spin with a projected rotational velocity of 96 km/s. It has 4.7 times the size of the Sun and is radiating 60 times the Sun's luminosity from its photosphere at an effective temperature of 7,401 K.

References

{{reflist|refs=

{{cite journal | last1 = Gontcharov | first1 = G. A. | title = Dependence of kinematics on the age of stars in the solar neighborhood | journal = Astronomy Letters | date = December 2012 | volume = 38 | issue = 12 | pages = 771–782 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712120031 | bibcode = 2012AstL...38..771G | arxiv = 1606.08814 | doi-access = free}}

{{cite journal |display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=Lee |first6=Nathan De |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |last31=Sharma |first31=Sanjib |last32=Shiao |first32=Bernie |last33=Sozzetti |first33=Alessandro |last34=Stello |first34=Dennis |last35=Vanderspek |first35=Roland |last36=Wallace |first36=Geoff |last37=Winn |first37=Joshua N. |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=9 September 2019 |volume=158 |issue=4 |pages=138 |doi=10.3847/1538-3881/ab3467 |issn=0004-6256 |bibcode=2019AJ....158..138S |arxiv=1905.10694 |doi-access=free}}

{{cite journal |last1=Valtier |first1=J. C. |last2=Sareyan |first2=J. P. |last3=Le Contel |first3=J. M. |last4=Zribi |first4=G. |title=Photometric observations of delta Scuti stars. II. HR 432, HR 515, HR 812 |journal=Astronomy and Astrophysics Supplement Series |date=January 1974 |volume=18 |pages=235–249 |bibcode=1974A&AS...18..235V }}

{{cite Gaia DR3|91651720174254976}}

{{cite journal

| title=The Late A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation

| last1=Gray | first1=R. O. | last2=Garrison | first2=R. F.

| journal=Astrophysical Journal Supplement

| volume=70 | page=623 | date=July 1989

| doi=10.1086/191349 | bibcode=1989ApJS...70..623G | doi-access=free }}

{{cite journal

| title=A revised catalogue of delta Sct stars

| last1=Rodríguez | first1=E.

| last2=López-González | first2=M. J.

| last3=López de Coca | first3=P.

| journal=Astronomy and Astrophysics Supplement

| volume=144 | pages=469−474 | date=June 2000

| issue=3 | doi=10.1051/aas:2000221 | bibcode=2000A&AS..144..469R | doi-access=free | hdl=10261/226673 | hdl-access=free }}

{{cite XHIP|8271|mode=cs2|postscript=.}}

{{cite journal

| 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 | s2cid=59451347 }}

{{cite journal

| display-authors=1 | last1=Royer | first1=F.

| last2=Grenier | first2=S. | last3=Baylac | first3=M.-O.

| last4=Gómez | first4=A. E. | last5=Zorec | first5=J.

| title=Rotational velocities of A-type stars in the northern hemisphere. II. Measurement of v sin i

| journal=Astronomy and Astrophysics

| volume=393 | pages=897–911 | date=October 2002

| doi=10.1051/0004-6361:20020943 | bibcode=2002A&A...393..897R

| arxiv=astro-ph/0205255 | s2cid=14070763 }}

{{cite web

| url=http://www.kusastro.kyoto-u.ac.jp/vsnet/gcvs2/PSCVY.html

| title=VY Psc (VY Piscium)

| publisher=VSNET

| access-date=1 August 2014 }}

{{cite web

| url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=26439

| title=VY Psc

| work=VSX: The International Variable Star Index

| publisher=American Association of Variable Star Observers

| access-date=1 August 2014 }}

{{cite journal

| last1=Abt | first1=Helmut A. | last2=Morrell | first2=Nidia I.

| title=The Relation between Rotational Velocities and Spectral Peculiarities among A-Type Stars

| journal=Astrophysical Journal Supplement

| volume=99 | pages=135 | year=1995

| doi=10.1086/192182 | bibcode=1995ApJS...99..135A | doi-access=free }}

{{cite simbad | title=V* VY Psc | access-date=2018-02-26 }}

}}

{{sky|01|46|35.29944|+|17|24|45.7133|453}}

{{Stars of Pisces}}

{{DEFAULTSORT:HR 515}}

Category:A-type giants

Category:F-type main-sequence stars

Category:Delta Scuti variables

Category:Pisces (constellation)

Category:Durchmusterung objects

Arietis, 03

010845

008271

0515

Piscium, VY