Kepler-89e

{{Infobox planet

| name = Kepler-89e

| discoverer = Lauren M. Weiss et al.

| discovered = 9 March 2013

| discovery_method = Transit method

| apsis = astron

| semimajor = {{convert|0.3046|±|0.0040|AU|km|abbr=on}}{{cite journal|doi=10.1088/0004-637X/768/1/14|title=The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux|journal=The Astrophysical Journal|volume=768|pages=14|year=2013|last1=Weiss|first1=Lauren M|last2=Marcy|first2=Geoffrey W|last3=Rowe|first3=Jason F|last4=Howard|first4=Andrew W|last5=Isaacson|first5=Howard|last6=Fortney|first6=Jonathan J|last7=Miller|first7=Neil|last8=Demory|first8=Brice-Olivier|last9=Fischer|first9=Debra A|last10=Adams|first10=Elisabeth R|last11=Dupree|first11=Andrea K|last12=Howell|first12=Steve B|last13=Kolbl|first13=Rea|last14=Johnson|first14=John Asher|last15=Horch|first15=Elliott P|last16=Everett|first16=Mark E|last17=Fabrycky|first17=Daniel C|last18=Seager|first18=Sara|issue=1 |display-authors=1|arxiv = 1303.2150 |bibcode = 2013ApJ...768...14W |s2cid=14261965 }}

| eccentricity = 0.019 ± 0.23

| period = {{nowrap|54.32031 ± 0.00012}} d

| inclination = 89.76 ± 0.15

| semi-amplitude = {{val|4.5|+2.3|-3.5}}

| star = Kepler-89

| mean_radius = 6.56 ± 0.62 {{Earth radius|link=y}}

| mass = {{val|35|+18|-28}} {{Earth mass|sym=y|link=y}}

| density = {{val|0.60|+0.26|-0.56}} g cm⁻³

| single_temperature = {{convert|584|K|C F}}

}}

Kepler-89e, also known as KOI-94e, is an exoplanet in the constellation of Cygnus. It orbits Kepler-89.

Physical properties

It is classed as a type III planet, making it cloudless and blue, and giving it the appearance of a larger version of Uranus and Neptune. It has a mass around 35 times that of Earth. It has a similar density to Saturn, 0.60 g/cm³, giving it a radius 6.56 times that of the Earth. It orbits an F-type main-sequence star at a distance of 0.305 astronomical units (au), with a period of 54.32031 days, making its orbit smaller than that of Mercury's. It has a very low eccentricity of 0.019. It has a temperature of 584 K.

Host star

Kepler-89e orbits the star Kepler-89. Kepler-89 has a mass of 1.18 solar masses,{{cite journal|bibcode=2016ApJ...822...86M|arxiv=1605.02825|doi=10.3847/0004-637X/822/2/86|title=False Positive Probabilities for Allkeplerobjects of Interest: 1284 Newly Validated Planets and 428 Likely False Positives|journal=The Astrophysical Journal|volume=822|issue=2|pages=86|year=2016|last1=Morton|first1=Timothy D.|last2=Bryson|first2=Stephen T.|last3=Coughlin|first3=Jeffrey L.|last4=Rowe|first4=Jason F.|last5=Ravichandran|first5=Ganesh|last6=Petigura|first6=Erik A.|last7=Haas|first7=Michael R.|last8=Batalha|first8=Natalie M.|s2cid=20832201 |display-authors=1 |doi-access=free }} and a radius of 1.32 solar radii. It is 3.3 billion years old, younger than the Sun, making its planets about 3,000,000,000 years old (3 Gyr). It has a temperature of 6,210 K, making it appear bright yellowish-white.

References

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Category:Transiting exoplanets

Category:Exoplanets discovered in 2013

Category:Cygnus (constellation)