Name | HAT-P-18 b | ||
Planet Status | Confirmed | ||
Discovered in | 2010 | ||
Mass | 0.183 ( -0.032 +0.034 ) MJ | ![]() |
|
Mass*sin(i) | — | ||
Semi-Major Axis | 0.0559 (± 0.0007) AU | ![]() |
|
Orbital Period | 5.508029 (± 4.2e-06) day | ![]() |
+ |
Eccentricity | 0.106 ( -0.084 +0.15 ) | ![]() |
|
ω | 120.0 (± 56.0) deg | ![]() |
|
Tperi | — | ||
Radius | 0.947 ( -0.044 +0.044 ) RJ | ![]() |
|
Inclination | 88.79 (± 0.21) deg | ![]() |
+ |
Update | 2015-11-12 | ||
Detection Method | Primary Transit | ||
Mass Detection Method | — | ||
Radius Detection Method | — | ||
Primary transit | 2454715.02254 (± 0.00039) JD | ![]() |
+ |
Secondary transit | 2454717.65 (± 0.13) JD | ||
λ | 132.0 (± 15.0) deg | ![]() |
|
Impact Parameter b | 0.324 (± 0.057) | ![]() |
|
Time Vr=0 | — | ||
Velocity Semiamplitude K | — | ||
Calculated temperature | 841.0 K | ![]() |
+ |
Measured temperature | — | ||
Hottest point longitude | — | ||
Geometric albedo | — | ||
Surface gravity log(g/gH) | 2.734 | ![]() |
|
Alternate Names | HAT-18b |
The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation
2022
VISSAPRAGADA Sh., KNUTSON H., GREKLEK-McKEON M., OKLOPIC A., DAI F. et al.
Astron. J., submitted
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The Sensitivity of Eclipse Mapping to Planetary Rotation
2021
ADAMS A. & RAUSCHER E.
ApJ, submitted
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Original Research By Young Twinkle Students (ORBYTS): Ephemeris Refinement of Transiting Exoplanets III
2021
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Metastable Helium Reveals an Extended Atmosphere for the Gas Giant HAT-P-18b
2021
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Investigating Trends in Atmospheric Compositions of Cool Gas Giant Planets Using Spitzer Secondary Eclipses
2019
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Astron J., 158, 217
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Rayleigh scattering in the transmission spectrum of HAT-P-18b
2017
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paper arxiv ADS
Friends of Hot Jupiters II: No Correspondence Between Hot-Jupiter Spin-Orbit Misalignment and the Incidence of Directly Imaged Stellar Companions
2015
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ApJ, 800, 138
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Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP-40 and WASP-21 systems
2015
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arxiv
Friends of Hot Jupiters III: An Infrared Spectroscopic Search for Low-Mass Stellar Companions
2015
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ApJ, 814, 148
paper arxiv ADS
The GAPS Programme with HARPS-N at TNG. III: The retrograde orbit of HAT-P-18b
2014
ESPOSITO M., COVINO E., MANCINI L., HARUTYUNYAN A., SOUTHWORTH J. & 20 co-authors
Astron. & Astrophys., 564, L13
paper arxiv ADS
Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
2014
KNUTSON H., FULTON B., MONTET B., KAO M., NGO H. & 8 additional authors
ApJ, 785, 126
paper arxiv ADS
Understanding the Mass-Radius Relation for Sub-Neptunes: Radius as a Proxy for Composition
2014
LOPEZ E. & FORTNEY J.
ApJ, 792, 1
paper arxiv ADS
The Mass of KOI-94d and a Relation for Planet Radius, Mass, and Incident Flux
2013
WEISS L., MARCY G., ROWE J., HOWARD A.,
ISAACSON H. & 13 additional authors
ApJ, 768, 14
paper arxiv ADS
The coronal X-ray–age relation and its implications for the evaporation of exoplanets
2012
JACKSON A., DAVIS T. & WHEATLEY P.
MNRAS, 422, 2024
paper arxiv ADS
Constraining Tidal Dissipation in Stars from The Destruction Rates of Exoplanets
2012
PENEV K., JACKSON B., SPADA F. & THOM N.
ApJ., 751, 96
paper arxiv ADS
Factors Affecting the Radii of Close-in Transiting Exoplanets
2012
ENOCH B., COLLIER CAMERON A. & HORNE K.
Astron. & Astrophys., 540, A99
paper arxiv ADS
The Heavy Element Masses of Extrasolar Giant Planets, Revealed
2011
MILLER N. & FORTNEY J.
ApJ. Letters, 736, L29
paper arxiv ADS
Quantization of Planetary Systems and its Dependency on Stellar Rotation
2011
ZOGHBI J.-P.
Publ. Astron. Soc. Australia, 28, 177
paper arxiv ADS
Mass-loss rates for transiting exoplanets
2011
EHRENREICH D. & DESERT J.-M.
Astron. & Astrophys., 529, A136
paper arxiv ADS
HAT-P-18b and HAT-P-19b: Two Low-Density Saturn-Mass Planets Transiting Metal-Rich K Stars
2011
HARTMAN J., BAKOS G., SATO B., TORRES G., NOYES R. & 18 co-authors
ApJ., 726, 52
paper arxiv ADS
The Exoplanet Handbook
2011
Michael Perryman
Content
Content and Chapter 5