R Cancri

{{Starbox begin

| name = R Cancri

}}

{{Starbox image

| image = 250px

| caption = The visual band light curve of R Cancri, from AAVSO data

}}

{{Starbox observe

| epoch = J2000

| ra = {{RA|08|16|33.82673}}

| dec = {{DEC|+11|43|34.4691}}

| appmag_v = 6.07 - 12.3

| constell = Cancer

}}

{{Starbox character

| class = M6e-M9e

| b-v = 1.53{{cite journal|bibcode=2002yCat.2237....0D|title=VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system|journal=CDS/ADC Collection of Electronic Catalogues|volume=2237|pages=0|last1=Ducati|first1=J. R.|year=2002}}

| u-b = 0.49

| variable = Mira

}}

{{Starbox astrometry

| radial_v = 35.42 ± 0.52{{Cite journal | doi = 10.1051/0004-6361:20041272| title = Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data| journal = Astronomy and Astrophysics| volume = 430| issue = 165| pages = 165–186| year = 2005| last1 = Famaey | first1 = B.| last2 = Jorissen | first2 = A.| last3 = Luri | first3 = X.| last4 = Mayor | first4 = M.| last5 = Udry | first5 = S.| last6 = Dejonghe | first6 = H.| last7 = Turon | first7 = C.|arxiv = astro-ph/0409579 |bibcode = 2005A&A...430..165F | s2cid = 17804304}}

| prop_mo_ra = {{val|0.635|0.195}}

| prop_mo_dec = {{val|-10.785|0.106}}

| parallax = 3.9375

| p_error = 0.1792

| parallax_footnote =

| dist_pc = {{val|262|11|12}}

| dist_ly = {{val|854|36|39}}

| dist_footnote =

}}

{{Starbox detail

| mass = 1.67

| radius = {{val|371|37}}

| temperature = {{val|2604|300|fmt=commas}}

| luminosity = 5,700{{efn|Calculated using the given radius and temperature by the Stefan-Boltzmann law.}}

| gravity = {{val|-0.608}}

| metal_fe = +0.29

}}

{{Starbox catalog

|names={{odlist|HD=69243 |HIP=40534 |HR=3248 |SAO=97694 |BD=+12°1803}}

}}

{{Starbox reference

|Simbad=R+Cnc

}}

R Cancri is a Mira variable in the constellation Cancer. Located approximately {{convert|830|ly|pc|order=flip}} distant, it varies between magnitudes 6.07 and 12.3 over a period of approximately 357 days.{{cite web|url=http://www.aavso.org/vsx/index.php?view=detail.top&oid=4805 |title=R Cancri|author1=VSX|last2=Otero|first2=S. A.|date=7 January 2011|website=AAVSO Website|publisher=American Association of Variable Star Observers|access-date=26 Jan 2021}} At its brightest, it is very faintly visible to the naked eye.

Friedrich Magnus Schwerd discovered R Cancri in 1829. It was one of the first variable stars to be discovered.

Notes

References

{{Reflist|refs=

{{cite journal | last1=Cannon | first1=Annie J. | title=Second catalogue of variable stars | journal=Annals of Harvard College Observatory | date=1907 | volume=55 | pages=1–94 | bibcode=1907AnHar..55....1C | url=https://articles.adsabs.harvard.edu/pdf/1907AnHar..55....1C | access-date=20 December 2024}}

{{cite web |title=The First Known Variable Stars |url=https://spider.seds.org/spider/Vars/vars.html |publisher=Students for the Exploration and Development of Space |access-date=1 January 2025}}

{{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=2021-03-01 |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 |volume=161 |issue=3 |pages=147 |doi=10.3847/1538-3881/abd806 |doi-access=free |arxiv=2012.05220 |bibcode=2021AJ....161..147B |issn=0004-6256}} Data about this star can be seen [https://dc.zah.uni-heidelberg.de/gedr3dist/q/cone/form here].

{{Cite journal |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Queiroz |first3=A. B. A. |last4=Chiappini |first4=C. |last5=Ardèvol |first5=J. |last6=Casamiquela |first6=L. |last7=Figueras |first7=F. |last8=Jiménez-Arranz |first8=Ó. |last9=Jordi |first9=C. |last10=Monguió |first10=M. |last11=Romero-Gómez |first11=M. |last12=Altamirano |first12=D. |last13=Antoja |first13=T. |last14=Assaad |first14=R. |last15=Cantat-Gaudin |first15=T. |date=2022-02-01 |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia EDR3 stars brighter than G = 18.5 |bibcode=2022A&A...658A..91A |journal=Astronomy and Astrophysics |volume=658 |pages=A91 |doi=10.1051/0004-6361/202142369 |arxiv=2111.01860 |issn=0004-6361}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=I/354 Database] at VizieR.

{{cite web |title=Download Data |url=https://www.aavso.org/data-download |website=aavso.org |publisher=AAVSO |access-date=1 October 2021}}

{{Cite journal |last1=Karovicova |first1=I. |last2=Wittkowski |first2=M. |last3=Ohnaka |first3=K. |last4=Boboltz |first4=D. A. |last5=Fossat |first5=E. |last6=Scholz |first6=M. |date=2013-12-01 |title=New insights into the dust formation of oxygen-rich AGB stars |url=https://www.aanda.org/articles/aa/abs/2013/12/aa22376-13/aa22376-13.html |journal=Astronomy & Astrophysics |language=en |volume=560 |pages=A75 |doi=10.1051/0004-6361/201322376 |issn=0004-6361|arxiv=1310.1924 |bibcode=2013A&A...560A..75K }}

}}

Category:Mira variables

Category:Cancer (constellation)

Category:M-type giants

Cancri, R

3248

69243

Category:Emission-line stars

040543

Category:Durchmusterung objects