1 Cancri

{{Short description|K-type giant star in the constellation Cancer}}

{{Starbox begin

| name = 1 Cancri

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cancer

| ra = {{RA|07|56|59.45262}}

| dec = {{DEC|+15|47|25.0019}}

| appmag_v = 5.97

}}

{{Starbox character

| class = K3− III

| r-i =

| v-r =

| b-v = {{Val|1.285|0.007}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|+13.55|0.12}}

| prop_mo_ra = −26.731

| prop_mo_dec = −42.7591

| parallax = 6.9810

| p_error = 0.0694

| parallax_footnote =

| absmag_v = 0.03

}}

{{Starbox detail

| source =

| mass = 1.1

| radius = 18.7

| luminosity = 199

| temperature = 4,231

| gravity = 2.03

| metal_fe = −0.01

| rotational_velocity =

| age_myr =

}}

{{Starbox catalog

| names = {{odlist | F=1 Cnc | BD=+16°1590 | FK5=1208 | HD=64960 | HIP=38848 | HR=3095 | SAO=97399 }}

}}

{{Starbox reference

| Simbad = 1+Cnc

}}

1 Cancri is a single star in the zodiac constellation of Cancer, positioned near the border with Gemini at a distance of around 467 light years from the Sun. It is barely visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.97. The object is moving further from the Earth with a heliocentric radial velocity of +14 km/s.

This is an evolved giant star with a stellar classification of K3− III, having exhausted the hydrogen at its core and expanded. It is specified as a spectral standard for that type. The angular diameter of the star measured from a lunar occultation is {{Val|2.1|0.6|ul=mas}}, which, at its estimated distance, equates to a physical radius of about 19 times the radius of the Sun. It is radiating 199 times the Sun's luminosity from its enlarged photosphere at an effective temperature of {{val|4,231|ul=K|fmt=commas}}.

References

{{Reflist|refs=

{{citation |postscript=. |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. |last5=Santiago |first5=B. X. |last6=Jordi |first6=C. |last7=Girardi |first7=L. |last8=Brown |first8=A. G. A. |last9=Matijevič |first9=G. |last10=Monari |first10=G. |last11=Cantat-Gaudin |first11=T. |last12=Weiler |first12=M. |last13=Khan |first13=S. |last14=Miglio |first14=A. |last15=Carrillo |first15=I. |last16=Romero-Gómez |first16=M. |last17=Minchev |first17=I. |last18=de Jong |first18=R. S. |last19=Antoja |first19=T. |last20=Ramos |first20=P. |last21=Steinmetz |first21=M. |last22=Enke |first22=H. |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 |journal=Astronomy & Astrophysics |date=August 2019 |volume=628 |pages=A94 |doi=10.1051/0004-6361/201935765 |issn=0004-6361 |bibcode=2019A&A...628A..94A |arxiv=1904.11302 |doi-access=free}}

{{citation |postscript=. |display-authors=1 |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Pepper |first3=Joshua |last4=Paegert |first4=Martin |last5=De Lee |first5=Nathan |last6=Torres |first6=Guillermo |last7=Latham |first7=David W. |last8=Charpinet |first8=Stéphane |last9=Dressing |first9=Courtney D. |last10=Huber |first10=Daniel |last11=Kane |first11=Stephen R. |last12=Lépine |first12=Sébastien |last13=Mann |first13=Andrew |last14=Muirhead |first14=Philip S. |last15=Rojas-Ayala |first15=Bárbara |last16=Silvotti |first16=Roberto |last17=Fleming |first17=Scott W. |last18=Levine |first18=Al |last19=Plavchan |first19=Peter |title=The TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=September 2018 |volume=156 |issue=3 |pages=102 |doi=10.3847/1538-3881/aad050 |arxiv=1706.00495 |bibcode=2018AJ....156..102S |issn=0004-6256|doi-access=free }}

{{citation |postscript=. | display-authors = 1 | last1 = Sprague | first1 = Dani | last2 = Culhane | first2 = Connor | last3 = Kounkel | first3 = Marina | last4 = Olney | first4 = Richard | last5 = Covey | first5 = K. R. | last6 = Hutchinson | first6 = Brian | last7 = Lingg | first7 = Ryan | last8 = Stassun | first8 = Keivan G. | last9 = Román-Zúñiga | first9 = Carlos G. | last10 = Roman-Lopes | first10 = Alexandre | last11 = Nidever | first11 = David | last12 = Beaton | first12 = Rachael L. | last13 = Borissova | first13 = Jura | last14 = Stutz | first14 = Amelia | last15 = Stringfellow | first15 = Guy S. | last16 = Ramírez | first16 = Karla Peña | last17 = Ramírez-Preciado | first17 = Valeria | last18 = Hernández | first18 = Jesús | last19 = Kim | first19 = Jinyoung Serena | last20 = Lane | first20 = Richard R. | title = APOGEE Net: An Expanded Spectral Model of Both Low-mass and High-mass Stars | journal = The Astronomical Journal | date = 8 March 2022 | volume = 163 | issue = 4 | page = 152 | issn = 0004-6256 | eissn = 1538-3881 | doi = 10.3847/1538-3881/ac4de7 | bibcode = 2022AJ....163..152S | arxiv = 2201.03661 | doi-access = free}}

{{citation

| 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 | postscript=. }}

{{citation

| last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A.

| title=A catalogue of multiplicity among bright stellar systems

| journal=Monthly Notices of the Royal Astronomical Society

| volume=389 | issue=2 | pages=869–879 | date=September 2008