57 Cancri

{{Short description|Star in the constellation Cancer}}

{{Starbox begin

| name = 57 Cancri

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cancer

| ra = {{RA|08|54|14.73274}}

| dec = {{DEC|+30|34|44.8283}}

| appmag_v = {{nowrap|+5.40 (6.09 + 6.37)}}

}}

{{Starbox character

| type =

| class = {{nowrap|G7 III + K0 III}}

| b-v = 1.05

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−59.2|0.4}}

| prop_mo_ra = +41.60

| prop_mo_dec = −24.02

| parallax = 7.07

| p_error = 0.68

| parallax_footnote =

| absmag_v = –0.33

}}

{{Starbox detail

| source =

| component1 = 57 Cnc A

| mass = {{Val|6.49|2.16}}

| radius =

| luminosity = 173.13

| temperature = {{Val|4810|92|fmt=commas}}

| gravity = {{Val|2.74|0.11}}

| metal_fe = {{Val|0.08|0.05}}

| rotational_velocity =

| age_myr = {{Val|645|154|120}}

}}

{{Starbox catalog

| names = {{odlist | F=57 Cnc | BD=+31°1907 | HD=75959 | HIP=43721 | HR=3532 | SAO=61125 | GC=12289 | ADS=7071 | WDS=J08542+3035 }}

}}

{{Starbox reference

| Simbad = 57+Cnc

}}

{{Starbox end}}

57 Cancri is a double star in the zodiac constellation of Cancer, located around 460 light years away from the Sun. They are visible to the naked eye as a faint star with a combined apparent visual magnitude of +5.40. The brighter member, designated component A. is a yellow-hued giant star with a stellar classification of G7 III and an apparent magnitude of +6.09. Its companion, component B, is an orange-hued giant with a class of K0 III and an apparent magnitude of +6.37. As of 2017, the pair had an angular separation of {{Val|1.50|ul=arcsecond}} along a position angle of 310°.

References

{{Reflist|refs=

{{cite simbad | title=57 Cnc | access-date=2019-03-06 }}

{{citation

| last1=Abt | first1=Helmut A. | postscript=.

| title=Visual Multiples. IX. MK Spectral Types

| journal=The Astrophysical Journal Supplement Series

| volume=176 | pages=216–217 | year=2008

| issue=1 | bibcode=2008ApJS..176..216A | doi=10.1086/525529 | 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

| title=Validation of the new Hipparcos reduction

| last1=van Leeuwen | first1=F.

| 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 | postscript=. }}

{{citation

| title=Determining Ages of APOGEE Giants with Known Distances

| journal=The Astrophysical Journal

| display-authors=1 | last1=Feuillet | first1=Diane K.

| last2=Bovy | first2=Jo | last3=Holtzman | first3=Jon

| last4=Girardi | first4=Léo | last5=MacDonald | first5=Nick

| last6=Majewski | first6=Steven R. | last7=Nidever | first7=David L.

| volume=817 | pages=40 | year=2016

| issue=1

| bibcode=2016ApJ...817...40F | arxiv=1511.04088

| doi=10.3847/0004-637X/817/1/40 | s2cid=118675933

| postscript=. | doi-access=free

}}

{{citation

| display-authors=1 | last1=Mason | first1=B. D.

| last2=Wycoff | first2=G. L. | last3=Hartkopf | first3=W. I.

| last4=Douglass | first4=G. G. | last5=Worley | first5=C. E.

| title=The Washington Visual Double Star Catalog | journal=The Astronomical Journal | year=2014

| volume=122 | issue=6 | page=3466 | bibcode=2001AJ....122.3466M | doi=10.1086/323920 | doi-access=free }}

}}

{{Stars of Cancer}}

{{DEFAULTSORT:57 Cancri}}

Category:G-type giants

Category:K-type giants

Category:Binary stars

Category:Cancer (constellation)

Category:Durchmusterung objects