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SU Persei

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

{{Starbox begin}}

{{Starbox image

| image=

{{Location mark

|image=Double Clusters in Perseus.png|alt=|float=center|width=280

|label=|position=right

|mark=GoldF39400 circle.svg|mark_width=10|mark_link=SU Per

|x=370|y=30

}}

|caption=Location of SU Persei (circled) near the Double Cluster (north is towards bottom right)

}}

{{Starbox observe

|constell=Perseus

|epoch=J2000.0

|ra={{RA|02|22|06.89}}

|dec={{DEC|+56|36|14.9}}

|appmag_v=7.2 - 8.7

}}

{{Starbox character

| type=red supergiant

| class=M3.5Iab

| variable=SRc

}}

{{Starbox astrometry

| radial_v={{val|-44.8|0.3}}

| prop_mo_ra=−0.765

| prop_mo_dec=−1.204

| parallax=0.4168

| p_error=0.0279

| parallax_footnote=

| absmag_v=−5.78

}}

{{Starbox detail

| mass={{val|13|4}}

| temperature={{val|3650|50|fmt=commas}}

| luminosity=91,201

| radius={{Val|1044|31|21|fmt=commas}}{{snd}}{{Val|1139|34|23|fmt=commas}}

| gravity=−0.1

| age_myr=

}}

{{Starbox catalog

| names={{odlist |V=SU Persei |HD=14469 |BD=+55°597}},
ASASSN-V J022206.86+563614.8

}}

{{Starbox reference |Simbad=SU+Per}}

{{Starbox end}}File:SUPerLightCurve.png for SU Persei, plotted from ASAS-SN data]]SU Persei is a red supergiant star located in the constellation of Perseus. It is within the Double Cluster, 7,250{{±|{{cvt|145|pc|ly|disp=number}}|{{cvt|129|pc|ly|disp=number}}}} light-years away. It is a semiregular variable star. Ranging in brightness from magnitude 7.2 to 8.7, it is too faint to be seen with the naked eye, but can be seen with binoculars or a telescope.

It was imaged by the CHARA array in 2015, 2016, 2019, 2020, and 2021. Observations during 2015 and 2016 with CHARA show that the star has an angular diameter between 3.51 and 3.68 milliarcseconds. Considering its large distance from Earth, this results in a radius between 1,044 and 1,139 times that of the Sun, making it one of the largest stars known.

SU Persei is losing mass at a rate of {{solar mass|{{val|1.62|0.72|0.63|e=-6}}}} per year, via a stellar wind.

In 1907, Henrietta Swan Leavitt discovered that the star's brightness varies by examining photographic plates. It was given its variable star designation, SU Persei, in 1908.

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See also

References

{{reflist|refs=

{{cite simbad |title=SU Persei |access-date=2025-03-30 }}

{{cite Gaia DR3|458284937619681664}}

{{Cite journal |last1=Bailer-Jones |first1=C. A. L. |last2=Rybizki |first2=J. |last3=Fouesneau |first3=M. |last4=Demleitner |first4=M. |last5=Andrae |first5=R. |date=February 2021 |title=Estimating Distances from Parallaxes. V. Geometric and Photogeometric Distances to 1.47 Billion Stars in Gaia Early Data Release 3 |journal=The Astronomical Journal |language=en |volume=161 |issue=3 |pages=147 |doi=10.3847/1538-3881/abd806 |doi-access=free |arxiv=2012.05220 |bibcode=2021AJ....161..147B |issn=1538-3881}}

{{Cite web |last=Norris |first=Ryan |date=2023 |title=Student Science at NMT: Learning Optical Interferometry Through Projects on Evolved Stars |url=https://www.chara.gsu.edu/files/2023Meeting/Norris_NMT_Students_2023.pdf |publisher=CHARA}}

{{cite journal | last1 = Anderson | first1 = E. | last2 = Francis | first2 = Ch. | title = XHIP: An extended hipparcos compilation | journal = Astronomy Letters | date = May 2012 | volume = 38 | issue = 5 | pages = 331–346 | issn = 1063-7737 | eissn = 1562-6873 | doi = 10.1134/S1063773712050015 | bibcode = 2012AstL...38..331A | arxiv = 1108.4971| s2cid = 119257644 }}

{{cite thesis |doi=10.57709/15009706 |date=2019 |last1=Norris |first1=Ryan |title=Seeing Stars Like Never Before: A Long-term Interferometric Imaging Survey of Red Supergiants |publisher=Georgia State University }}

{{cite journal |bibcode=2020A&A...643A.116D |title=High-resolution spectroscopic study of massive blue and red supergiants in Perseus OB1. I. Definition of the sample, membership, and kinematics |last1=De Burgos |first1=A. |last2=Simon-Díaz |first2=S. |last3=Lennon |first3=D. J. |last4=Dorda |first4=R. |last5=Negueruela |first5=I. |last6=Urbaneja |first6=M. A. |last7=Patrick |first7=L. R. |last8=Herrero |first8=A. |journal=Astronomy and Astrophysics |date=2020 |volume=643 |pages=A116 |doi=10.1051/0004-6361/202039019 |arxiv=2008.13299 }}

{{cite journal |bibcode=2009ApJ...703..420M |title=Red Supergiants in the Andromeda Galaxy (M31) |last1=Massey |first1=Philip |last2=Silva |first2=David R. |last3=Levesque |first3=Emily M. |last4=Plez |first4=Bertrand |last5=Olsen |first5=Knut A. G. |last6=Clayton |first6=Geoffrey C. |last7=Meynet |first7=Georges |last8=Maeder |first8=Andre |journal=The Astrophysical Journal |date=2009 |volume=703 |issue=1 |page=420 |doi=10.1088/0004-637X/703/1/420 |arxiv=0907.3767 }}

{{cite journal |bibcode=2019AJ....157..167D |title=Atomic Absorption Line Diagnostics for the Physical Properties of Red Supergiants |last1=Dicenzo |first1=Brooke |last2=Levesque |first2=Emily M. |journal=The Astronomical Journal |date=2019 |volume=157 |issue=4 |page=167 |doi=10.3847/1538-3881/ab01cb |doi-access=free |arxiv=1902.01862 }}

{{cite web |url=https://www.aavso.org/vsx/index.php?view=detail.top&oid=25545 |title=SU Per |website=International Variable Star Index |access-date=2025-03-30 }}

{{cite web |url=https://asas-sn.osu.edu/variables/lookup |website=ASAS-SN Variable Stars Database|title=ASAS-SN Variable Stars Database|publisher=ASAS-SN |access-date=30 March 2025}}

{{cite journal |last1=Leavitt |first1=Henrietta S. |last2=Pickering |first2=Edward C. |title=New Variable Stars in Harvard Map, Nos. 3 and 6 |journal=Harvard College Observatory Circular |date=April 1907 |volume=127 |pages=1-4 |url=https://articles.adsabs.harvard.edu/pdf/1907HarCi.127....1L |bibcode=1907HarCi.127....1L |access-date=30 March 2025}}

{{cite journal |last1=Dunér |first1=Nils Christofer |last2=Hartwig |first2=Ernst |last3=Müller |first3=G. |title=Benennung von neu entdeckten veränderlichen Sternen |journal=Astronomische Nachrichten |date=October 1908 |volume=179 |issue=6 |page=85 |doi=10.1002/asna.19081790602 |bibcode=1908AN....179...85D |url=https://articles.adsabs.harvard.edu/pdf/1909AN....179...85D |access-date=30 March 2025}}

{{cite journal |last1=Decin |first1=L. |last2=Richards |first2=A. M. S. |last3=Marchant |first3=P. |last4=Sana |first4=H. |title=ALMA detection of CO rotational line emission in red supergiant stars of the massive young star cluster RSGC1. Determination of a new mass-loss rate prescription for red supergiants |journal=Astronomy & Astrophysics |date=January 2024 |volume=681 |page=A17 |doi=10.1051/0004-6361/202244635 |bibcode=2024A&A...681A..17D |url=https://www.aanda.org/articles/aa/pdf/2024/01/aa44635-22.pdf |access-date=31 March 2025}}

}}

{{Stars of Perseus}}

{{Variable-star-stub}}

Category:Perseus (constellation)

Category:M-type supergiants

Category:Semiregular variable stars

Persei, SU

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