70 Cancri

{{Starbox begin

| name = 70 Cancri

}}

{{Starbox observe

| epoch = J2000.0

| constell = Cancer

| ra = {{RA|09|04|09.86704}}

| dec = {{DEC|+27|53|53.9089}}

| appmag_v = 6.665

}}

{{Starbox character

| type = main sequence

| class = A1V

| b-v = +0.00

| u-b = +0.05

| variable =

}}

{{Starbox astrometry

| radial_v = {{Val|-21.0|4.4}}

| prop_mo_ra = −1.287

| prop_mo_dec = −1.429

| parallax = 5.6109

| p_error = 0.1390

| parallax_footnote =

| absmag_v = 0.24

}}

{{Starbox detail

| source =

| mass =

| radius = 2.7

| luminosity = 75.57

| temperature = {{Val|8887|352|376|fmt=commas}}

| gravity =

| metal_fe =

| rotational_velocity =

| age_gyr =

}}

{{Starbox catalog

| names = {{odlist | F=70 Cnc | BD=+28°1683 | HD=77557 | HIP=44512 | HR=3601 | SAO=80609 }}

}}

{{Starbox reference

| Simbad = 70+Cnc

}}

70 Cancri is a star in the zodiac constellation of Cancer, located around 580 light years from the Sun. It is a challenge to view with the naked eye even under good seeing conditions, having an apparent visual magnitude of 6.7. The star is moving closer to the Earth with a heliocentric radial velocity of -21 km/s, and is expected to come to within {{Convert|13.48|pc|ly|0|abbr=off|disp=out}} in around nine million years. It is an A-type main-sequence star with a stellar classification of A1V. The object has a radius of about {{solar radius|2.7}} and is radiating 76 times the Sun's luminosity from its photosphere at an effective temperature of 8,887 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=. }}

{{cite journal|display-authors=1|author1=Pasinetti Fracassini, L. E.|author2=Pastori, L.|author3=Covino, S.|author4=Pozzi, A.|title=Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS) - Third edition - Comments and statistics|journal=Astronomy & Astrophysics|volume=367|pages=521–24|date=2001|issue=2|bibcode=2001A&A...367..521P|doi=10.1051/0004-6361:20000451|arxiv=astro-ph/0012289|s2cid=425754}}

{{cite journal|title=The Tycho-2 catalogue of the 2.5 million brightest stars|author=Høg, E.|display-authors=etal|date=2000|journal=Astronomy and Astrophysics|volume=355|pages=L27–L30|bibcode=2000A&A...355L..27H}}

{{cite journal|title=A study of the bright A stars. I. A catalogue of spectral classifications|author1=Cowley, A.|author2=Cowley, C.|author3=Jaschek, M.|author4=Jaschek, C.|journal=Astronomical Journal|volume=74|pages=375–406|date=1969|bibcode=1969AJ.....74..375C|doi=10.1086/110819}}

{{cite journal|title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system|author=Gontcharov, G. A.|date=2006|journal=Astronomy Letters|volume=32|issue=11|pages=759–771|bibcode=2006AstL...32..759G|doi=10.1134/S1063773706110065|arxiv=1606.08053|s2cid=119231169}}

{{cite journal|title=Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of A0 V Stars|author=Osawa, Kiyoteru|journal=Astrophysical Journal|volume=130|page=159|date=1959|bibcode=1959ApJ...130..159O|doi=10.1086/146706|doi-access=free}}

}}

Category:A-type main-sequence stars

Category:Cancer (constellation)

Category:Durchmusterung objects