Psi1 Piscium

{{short description|Binary star in the constellation Pisces}}

{{for|other stars with this Bayer designation|psi Piscium{{!}}ψ Piscium}}

{{DISPLAYTITLE:Psi¹ Piscium}}

{{Starbox begin|name=ψ¹ Piscium}}

{{Starbox image

| image=

{{Location mark

|image=Pisces constellation map.svg|alt=|float=center|width=260

|label=|position=right

|mark=Red circle.svg|mark_width=10|mark_link=ψ¹ Piscium

|x=344|y=360

}}

|caption=Location of ψ¹ Piscium (circled)

}}

{{Starbox observe 2s

|epoch=J2000

|constell=Pisecs

|component1=ψ¹ Psc A

|ra1={{RA|01|05|40.95527}}

|dec1={{DEC|+21|28|23.4489}}

|appmag_v1=5.273{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}

|component2=ψ¹ Psc B

|ra2={{RA|01|05|41.71111}}

|dec2={{DEC|+21|27|55.6120}}

|appmag_v2=5.455

}}

{{Starbox character

|component=ψ¹ Psc A

|class=A1V + A4V{{cite journal|bibcode=2011AJ....141...45H|doi=10.1088/0004-6256/141/2/45|title=Observations of Binary Stars with the Differential Speckle Survey Instrument. Ii.hipparcosstars Observed in 2010 January and June|journal=The Astronomical Journal|volume=141|issue=2|pages=45|year=2011|last1=Horch|first1=Elliott P.|last2=Gomez|first2=Shamilia C.|last3=Sherry|first3=William H.|last4=Howell|first4=Steve B.|last5=Ciardi|first5=David R.|last6=Anderson|first6=Lisa M.|last7=Van Altena|first7=William F.|s2cid=27904496|doi-access=free}}

|b-v=−0.04{{cite journal|bibcode=1964ApJ...139.1105T|title=A UBV Study of 94 Wide Visual Binaries|journal=Astrophysical Journal|volume=139|page=1105|author1=Tolbert, C. R.|year=1964|doi=10.1086/147852|doi-access=free}}

|u-b=−0.12

}}

{{Starbox character|no_heading=y

|component=ψ¹ Psc B

|class=A0Vn{{cite simbad|title=* 74 Psc B|access-date=24 May 2017}}

|b-v=−0.06

|u-b=−0.17

}}

{{Starbox astrometry

|component1=ψ¹ Psc A

|radial_v={{val|-3.90|2.9}}{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053|s2cid=119231169}}

|prop_mo_ra=44.49{{cite journal|title=Validation of the new Hipparcos reduction|author=van Leeuwen, F.|display-authors=etal|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|s2cid = 18759600}}

|prop_mo_dec=−14.82

|parallax=11.86

|p_error=0.68

|parallax_footnote=

|absmag_v=+0.71{{cite journal

| 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 }}

|component2=ψ¹ Psc B

|radial_v2={{val|-7.20|3.6}}{{cite journal|title=Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations|author=Kharchenko, N. V.|display-authors=etal|journal=Astronomische Nachrichten|volume=328|issue=9|page=889|date=2007|bibcode=2007AN....328..889K|doi=10.1002/asna.200710776|arxiv=0705.0878|s2cid=119323941}}

|prop_mo_ra2=54.952

|prop_mo_dec2=−15.938

|parallax2=11.3778

|p_error2=0.0506

|parallax_footnote2={{cite Gaia DR3|2790497465471261568}}

|absmag_v2=+0.89

}}

{{Starbox orbit

|reference=

|primary=ψ¹ Psc Aa

|name=ψ¹ Psc Ab

|period={{val|14.44|0.26}}

|axis={{val|114.3|1.7}}

|inclination={{val|77.43|0.81}}

|node={{val|134.8|1.2}}

|periastron=B {{val|2007.512|0.041}}

|eccentricity={{val|0.519|0.027}}

|periarg={{val|305.4|2.3}}

}}

{{Starbox detail

| component1 = ψ¹ Psc Aa

| mass = 2.2{{cite journal | last1 = Tokovinin | first1 = Andrei | title = The Updated Multiple Star Catalog | journal = The Astrophysical Journal Supplement Series | date = 23 February 2018 | volume = 235 | issue = 1 | page = 6 | eissn = 1538-4365 | doi = 10.3847/1538-4365/aaa1a5 | bibcode = 2018ApJS..235....6T | arxiv = 1712.04750 | doi-access = free}}

| component2 = ψ¹ Psc Ab

| mass2 = 1.7

}}

{{Starbox detail

| component1 = ψ¹ Psc B

| mass = 2.6

| temperature = 10,694

| luminosity = 57

| radius = 2.2

| gravity = 4.04

| rotational_velocity = 250{{cite journal |last1=Howe |first1=K. S. |last2=Clarke |first2=C. J. |title=An analysis of v sin (i) correlations in early-type binaries |journal=Monthly Notices of the Royal Astronomical Society |date=January 2009 |volume=392 |issue=1 |pages=448–454 |doi=10.1111/j.1365-2966.2008.14073.x |issn=0035-8711 |bibcode=2009MNRAS.392..448H|s2cid=120183969 |doi-access=free }}

| age_myr = 210

}}

{{Starbox catalog

|names={{odlist|B=ψ¹ Psc|F=74 Psc|ADS=899 AB|CCDM=J01057+2128}}

|component1=ψ¹ Psc A

|names1={{odlist|BD=+20°156|HD=6456|HIP=5131|HR=310|SAO=74482}}

|component2=ψ¹ Psc B

|names2={{odlist|BD=+20°157|HD=6457|HIP=5132|HR=311|SAO=74483}}

}}

{{Starbox reference

|Simbad=*+74+Psc+A|sn=ψ¹ Psc A

|Simbad2=*+74+Psc+B|sn2=ψ¹ Psc B

}}

{{Starbox end}}

Psi¹ Piscium (Psi¹ Psc, ψ¹ Piscium, ψ¹ Psc) is a binary star in the constellation Pisces. It is approximately 280 light years from Earth, based on its parallax.

The two components of Psi¹ Piscium are both A-type main-sequence stars. The primary has an apparent magnitude of 5.273, while the secondary is slightly dimmer, with an apparent magnitude of 5.455. The primary itself is a close binary, with two A-type stars that orbit each other every 14.44 years.

Psi¹ Piscium is moving through the Galaxy at a speed of 22.5 km/s relative to the Sun. Its projected Galactic orbit carries it between 22,800 and 24,300 light years from the center of the Galaxy.[https://archive.today/20130414071216/http://www.astrostudio.org/xhip.php?hip=5131 Psi-1 Piscium A (HIP 5131)]