5 Cancri

{{Starbox begin

| name = 5 Cancri

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cancer

| ra = {{RA|08|01|30.28830}}

| dec = {{DEC|+16|27|19.1191}}

| appmag_v = 5.99

}}

{{Starbox character

| type = main sequence

| class = B9.5 Vn

| b-v = {{Val|−0.024|0.003}}

| u-b =

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|−10.0|1.5}}

| prop_mo_ra = +4.12

| prop_mo_dec = −5.43

| parallax = 6.2251

| p_error = 0.1419

| parallax_footnote =

| absmag_v = −0.09

}}

{{Starbox detail

| source =

| mass = {{Val|2.93|0.10}}

| radius = 3.1

| luminosity = {{Val|121.1|20.2|17.3}}

| temperature = {{Val|9727|90|89|fmt=commas}}

| gravity = 4.5

| metal_fe =

| rotational_velocity = 188

| age_myr = 36

}}

{{Starbox catalog

| names = {{odlist | F=5 Cnc | BD=+16°1612 | HD=65873 | HIP=39236 | HR=3134 | SAO=97485 }}

}}

{{Starbox reference

| Simbad = 5+Cnc

}}

5 Cancri is a single star in the zodiac constellation of Cancer, located around 520 light years away from the Sun. It is just visible to the naked eye under good seeing conditions as a dim, blue-white hued star with an apparent visual magnitude of 5.99. This object is moving closer to the Sun with a heliocentric radial velocity of −10 km/s.

At one point this was thought to be a spectroscopic binary system. It is a Be star with a weak circumstellar disk of gas that has around three times the radius of the host star. The stellar classification of 5 Cancri is B9.5 Vn, matching a B-type main-sequence star with "nebulous" lines due to rapid rotation. It is 36 million years old with a high projected rotational velocity of 188 km/s. The star has 2.9 times the mass of the Sun and about 3.1 times the Sun's radius. It is radiating 121 times the Sun's luminosity from its photosphere at an effective temperature of 9,727 K.

References

{{Reflist|refs=

{{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=Pasinetti Fracassini | first1=L. E. | last2=Pastori | first2=L.

| last3=Covino | first3=S. | last4=Pozzi | first4=A.

| title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)

| display-authors=1 | edition=Third

| journal=Astronomy and Astrophysics

| volume=367 | pages=521–524 | date=February 2001

| doi=10.1051/0004-6361:20000451 | postscript=.

| bibcode=2001A&A...367..521P | arxiv=astro-ph/0012289 | s2cid=425754 }}

{{citation

| title=Extracting Radial Velocities of A- and B-type Stars from Echelle Spectrograph Calibration Spectra

| last1=Becker | first1=Juliette C. | last2=Johnson | first2=John Asher

| last3=Vanderburg | first3=Andrew | last4=Morton | first4=Timothy D.

| journal=The Astrophysical Journal Supplement Series

| doi=10.1088/0067-0049/217/2/29 | bibcode=2015ApJS..217...29B

| arxiv=1503.03874 | s2cid=33968873 | display-authors=1 | postscript=. }}

{{citation

| title=The Close Companion Mass-ratio Distribution of Intermediate-mass Stars

| display-authors=1 | last1=Gullikson | first1=Kevin

| last2=Kraus | first2=Adam | last3=Dodson-Robinson | first3=Sarah

| journal=The Astronomical Journal

| doi=10.3847/0004-6256/152/2/40 | bibcode=2016AJ....152...40G

| arxiv=1604.06456 | s2cid=119179065 | postscript=. | doi-access=free }}

{{citation | postscript=.

| title=Observations of Bn and An stars: New Be stars

| display-authors=1 | last1=Ghosh | first1=K. K.

| last2=Apparao | first2=K. M. V. | last3=Pukalenthi | first3=S.

| journal=Astronomy and Astrophysics Supplement

| volume=134 | pages=359–364 | date=January 1999

| issue=2

| doi=10.1051/aas:1999144 | bibcode=1999A&AS..134..359G | doi-access=free }}

{{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

| doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | postscript=.

| bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | s2cid=14878976 }}

{{citation

| first=F. | last=van Leeuwen

| title=Validation of the new Hipparcos reduction

| journal=Astronomy and Astrophysics

| volume=474 | issue=2 | pages=653–664 | date=November 2007

| bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357

| postscript=. | arxiv=0708.1752 | s2cid=18759600

}}

{{citation

| last1=Zorec | first1=J. | last2=Royer | first2=F.

| title=Rotational velocities of A-type stars

| journal=Astronomy & Astrophysics

| volume=537 | pages=A120 | year=2012

| arxiv=1201.2052 | bibcode=2012A&A...537A.120Z

| doi=10.1051/0004-6361/201117691 | s2cid=55586789 | postscript=. }}

}}

Category:B-type main-sequence stars

Category:Be stars

Category:Cancer (constellation)

Category:Durchmusterung objects

5 Cancri

See also

References