Kepler-68b

{{Infobox planet

| name = Kepler-68b

| discovery_ref =

| discoverer = Gilliland et al.

| discovery_site = Kepler Space Observatory

| discovered = 2013

| discovery_method = Transits, and transit-timing variations

| alt_names = {{odlist | KOI=246.01 }}

| orbit_ref =

| semimajor = {{val|0.06170|0.00056|ul=AU}}

| eccentricity =

| period = {{val|5.398763|u=days}}

| inclination = {{val|87.60|0.90|u=º}}

| semi-amplitude = {{val|2.7|0.48|0.46|ul=m/s}}

| star = Kepler-68

| physical_ref =

| mean_radius = {{val|2.31|0.06|0.09|ul=Earth radius}}

| mass = {{val|7.65|1.37|1.32|ul=Earth mass}}

}}

Kepler-68b is an exoplanet orbiting the Sun-like star Kepler-68 in the constellation of Cygnus. Discovered by planetary-transit methods by the Kepler space telescope in February 2013, it has a radius of 2.31 ± 0.07 that of Earth and a density of 2.46–4.3 g/cm³. It has an orbital period of 5.398763 days at a distance of about 0.0617 AU from its star. Doppler measurements were made to determine its mass to be 5.79 times that of Earth (0.026 M_J).

With a density of 2.6 g/cm³ it has physical characteristics of both a super-Earth and a mini-Neptune.

References

{{reflist|refs=

{{cite journal | title=Kepler-68: Three Planets, One with a Density Between That of Earth and Ice Giants | last1=Gilliland | first1=Ronald L. | last2=Marcy | first2=Geoffrey W. | last3=Rowe | first3=Jason F. | last4=Rogers | first4=Leslie | last5=Torres | first5=Guillermo | last6=Fressin | first6=Francois | last7=Lopez | first7=Eric D. | last8=Buchhave | first8=Lars A. | last9=Christensen-Dalsgaard | first9=Jørgen | last10=Désert | first10=Jean-Michel | last11=Henze | first11=Christopher E. | last12=Isaacson | first12=Howard | last13=Jenkins | first13=Jon M. | last14=Lissauer | first14=Jack J. | last15=Chaplin | first15=William J. | last16=Basu | first16=Sarbani | last17=Metcalfe | first17=Travis S. | last18=Elsworth | first18=Yvonne | last19=Handberg | first19=Rasmus | last20=Hekker | first20=Saskia | last21=Huber | first21=Daniel | last22=Karoff | first22=Christoffer | last23=Kjeldsen | first23=Hans | last24=Lund | first24=Mikkel N. | last25=Lundkvist | first25=Mia | last26=Miglio | first26=Andrea | last27=Charbonneau | first27=David | last28=Ford | first28=Eric B. | last29=Fortney | first29=Jonathan J. | last30=Haas | first30=Michael R. | display-authors=1 | journal=The Astrophysical Journal | volume=766 | issue=1 | at=40 | year=2013 | arxiv=1302.2596 | bibcode=2013ApJ...766...40G | bibcode-access=free | doi=10.1088/0004-637X/766/1/40 | doi-access=free }}

{{cite journal | title=Masses, Radii, and Orbits of Small Kepler Planets: The Transition from Gaseous to Rocky Planets | last1=Marcy | first1=Geoffrey W. | last2=Isaacson | first2=Howard | last3=Howard | first3=Andrew W. | last4=Rowe | first4=Jason F. | last5=Jenkins | first5=Jon M. | last6=Bryson | first6=Stephen T. | last7=Latham | first7=David W. | last8=Howell | first8=Steve B. | last9=Gautier | first9=Thomas N. | last10=Batalha | first10=Natalie M. | last11=Rogers | first11=Leslie | last12=Ciardi | first12=David | last13=Fischer | first13=Debra A. | last14=Gilliland | first14=Ronald L. | last15=Kjeldsen | first15=Hans | last16=Christensen-Dalsgaard | first16=Jørgen | last17=Huber | first17=Daniel | last18=Chaplin | first18=William J. | last19=Basu | first19=Sarbani | last20=Buchhave | first20=Lars A. | last21=Quinn | first21=Samuel N. | last22=Borucki | first22=William J. | last23=Koch | first23=David G. | last24=Hunter | first24=Roger | last25=Caldwell | first25=Douglas A. | last26=Van Cleve | first26=Jeffrey | last27=Kolbl | first27=Rea | last28=Weiss | first28=Lauren M. | last29=Petigura | first29=Erik | last30=Seager | first30=Sara | display-authors=1 | journal=The Astrophysical Journal Supplement Series | volume=210 | issue=2 | at=20 | year=2014 | arxiv=1401.4195 | bibcode=2014ApJS..210...20M | bibcode-access=free | doi=10.1088/0067-0049/210/2/20 | doi-access=free }}

{{cite journal | title=Long-period Giant Companions to Three Compact, Multiplanet Systems | last1=Mills | first1=Sean M. | last2=Howard | first2=Andrew W. | last3=Weiss | first3=Lauren M. | last4=Steffen | first4=Jason H. | last5=Isaacson | first5=Howard | last6=Fulton | first6=Benjamin J. | last7=Petigura | first7=Erik A. | last8=Kosiarek | first8=Molly R. | last9=Hirsch | first9=Lea A. | last10=Boisvert | first10=John H. | display-authors=1 | journal=The Astronomical Journal | volume=157 | issue=4 | at=145 | year=2019 | arxiv=1903.07186 | bibcode=2019AJ....157..145M | doi=10.3847/1538-3881/ab0899 | s2cid=119197547 | doi-access=free }}

}}{{Kepler-68}}

Category:Exoplanets discovered in 2013

68b

Category:Cygnus (constellation)

Category:Terrestrial planets

Category:Transiting exoplanets

Kepler-68b

See also

References