87 Leonis

{{about-distinguish|e Leonis|epsilon Leonis{{!}}ε (epsilon) Leonis}}

{{Starbox begin

| name = 87 Leonis}}

{{Starbox observe

| epoch = J2000.0

| equinox = J2000.0 (ICRS)

| constell = Leo

| ra = {{RA|11|30|18.89335}}

| dec = {{DEC|−03|00|12.5712}}

| appmag_v = 4.77

}}

{{Starbox character

| class = {{nowrap|K3+ III Fe−0.5}}

| b-v = {{Val|+1.529|0.016}}

| u-b = +1.83

| r-i = +0.84

}}

{{Starbox astrometry

| radial_v = {{Val|18.40|0.15}}

| prop_mo_ra = +19.554

| prop_mo_dec = −16.149

| pm_footnote =

| parallax = 6.5892

| p_error = 0.1128

| parallax_footnote =

| absmag_v = −1.56

}}

{{Starbox detail

| source =

| mass = 0.86 or 0.94

| radius = {{Val|52.4|1.0}}

| luminosity = {{val|544|54|fmt=commas}}

| temperature = {{Val|3852|90|fmt=commas}}

| gravity = {{Val|0.95|0.06}}

| metal_fe = {{Val|−0.39|0.05}}

| rotational_velocity = ≤ 19

| age_myr =

}}

{{Starbox catalog

| names={{odlist | B=e Leonis | F=87 Leo | BD=−02°3360 | FK5=2917 | HD=99998 | HIP=56127 | HR=4432 | SAO=138238 | GC=15779 | PPM=178510 }}

}}

{{Starbox reference

| Simbad=87+Leonis

}}

87 Leonis is a single star in the zodiac constellation of Leo, located approximately 495 light years away from Earth. It has the Bayer designation e Leonis; 87 Leonis is the Flamsteed designation. This object is visible by the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.77. It is moving away from the Earth with a heliocentric radial velocity of 19 km/s. The star is positioned near the ecliptic and thus is subject to occultation by the Moon.

This is an aging K-type giant star with a stellar classification of {{nowrap|K3+ III Fe−0.5}}, which means it has exhausted the hydrogen at its core and evolved away from the main sequence. The suffix notation indicates a mild underabundance of iron in the atmosphere. It has expanded to 52 times the Sun's radius and is radiating around 540 times the Sun's luminosity from its photosphere at an effective temperature of 3,852 K.

References

{{reflist|refs=

{{Cite journal |last=Soubiran |first=C. |last2=Creevey |first2=O. L. |last3=Lagarde |first3=N. |last4=Brouillet |first4=N. |last5=Jofré |first5=P. |last6=Casamiquela |first6=L. |last7=Heiter |first7=U. |last8=Aguilera-Gómez |first8=C. |last9=Vitali |first9=S. |last10=Worley |first10=C. |last11=de Brito Silva |first11=D. |date=2024-02-01 |title=Gaia FGK benchmark stars: Fundamental Teff and log g of the third version |bibcode=2024A&A...682A.145S |journal=Astronomy and Astrophysics |volume=682 |pages=A145 |doi=10.1051/0004-6361/202347136 | doi-access=free|issn=0004-6361}} [https://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A%2BA/682/A145&HD=HD99998 87 Leonis' database entry] in VizieR.

{{citation

| title=The angular diameter of 87 Leonis.

| display-authors=2 | last1=Dunham | first1=D. W.

| last2=Evans | first2=D. S. | last3=Sandmann | first3=W. H.

| journal=Astronomical Journal

| volume=79 | pages=483–484 | date=April 1974

| doi=10.1086/111568 | bibcode=1974AJ.....79..483D }}

{{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