Kepler-17b

{{Short description|Super Jupiter orbiting Kepler-17}}

{{Infobox planet

| name = Kepler-17b

| discoverer = Aldo S. Bonomo et al.

| discovered = 25 October 2011

| discovery_method = Transit method

| apsis = astron

| semimajor = {{convert|0.0268|±|0.0005|AU|km|abbr=on}}

| period = 1.4857108 ± 0.0000002 d

| inclination = 87.22 ± 0.15{{cite journal|bibcode=2012A&A...538A..96B|arxiv=1110.5462|doi=10.1051/0004-6361/201118323|title=SOPHIE velocimetry of Keplertransit candidates|journal=Astronomy & Astrophysics|volume=538|pages=A96|year=2012|last1=Bonomo|first1=A. S.|last2=Hébrard|first2=G.|last3=Santerne|first3=A.|last4=Santos|first4=N. C.|last5=Deleuil|first5=M.|last6=Almenara|first6=J.|last7=Bouchy|first7=F.|last8=Díaz|first8=R. F.|last9=Moutou|first9=C.|last10=Vanhuysse|first10=M.|s2cid=118528032 }}

| star = Kepler-17

| mean_radius = 1.33 ± 0.04 {{Jupiter radius|link=y}}

| mass = 2.47 ± 0.10 {{Jupiter mass|link=y}}

| density = {{convert|1.30|±|0.14|g/cm3|lk=on|abbr=on}}

| surface_grav = {{convert|3.54|±|0.03|m/s2|lk=on|abbr=on}}

| single_temperature = 2229{{±|50|58}} K.

}}

File:Kepler-17_b.jpg (left) and Jupiter (right)]]

Kepler-17b is a planet in the orbit of star Kepler-17, first observed by the Kepler spacecraft observatory in 2011. Kepler-17b is a gas giant nearly 2.45 times the mass of Jupiter, and is sometimes described as a "super-Jupiter".

The planet is likely to be tidally locked to the parent star. In 2015, the planetary nightside temperature was estimated to be equal to 2229{{±|50|58}} K.[https://iopscience.iop.org/article/10.1086/683797/pdf A Comprehensive Study of Kepler Phase Curves and Secondary Eclipses:Temperatures and Albedos of Confirmed Kepler Giant Planets]

The study in 2012, utilizing a Rossiter–McLaughlin effect, have determined the planetary orbit is probably aligned with the equatorial plane of the star, misalignment equal to 0{{±|15}}°.{{citation|arxiv=1206.6105|title=Obliquities of Hot Jupiter Host Stars: Evidence for Tidal Interactions and Primordial Misalignments|year=2012|doi=10.1088/0004-637X/757/1/18 |last1=Albrecht |first1=Simon |last2=Winn |first2=Joshua N. |last3=Johnson |first3=John A. |last4=Howard |first4=Andrew W. |last5=Marcy |first5=Geoffrey W. |last6=Butler |first6=R. Paul |last7=Arriagada |first7=Pamela |last8=Crane |first8=Jeffrey D. |last9=Shectman |first9=Stephen A. |last10=Thompson |first10=Ian B. |last11=Hirano |first11=Teruyuki |last12=Bakos |first12=Gaspar |last13=Hartman |first13=Joel D. |journal=The Astrophysical Journal |volume=757 |issue=1 |page=18 |bibcode=2012ApJ...757...18A |s2cid=17174530 }}