This paper studies the three planets HR 8799b, c, and d in the archival data set of HR 8799 obtained with the Hubble Space Telescope (HST) NICMOS coronagraph in 1998. G. Chauvin A picture of the four planets around HR 8799 taken December 8th 2010. & HAGHIGHIPOUR N. paper, Non-redundant Aperture Masking Constraints on Massive Companions within 12 AU of the HR 8799 System BAAS, 42, no 1, 377.06 CURRIE Th., FUKAGAWA M., THALMANN Ch., MATSUMURA S. & PLAVCHAN P. BAAS, 41, no 3, 05.06 HR 8799e is the innermost planet in this video. paper   arxiv, Observational Constraints on Companions inside of 10 AU in the HR 8799 Planetary System Astron. HINKLEY S. arxiv   paper   arxiv, LBT observations of the HR 8799 planetary system: First detection of HR8799e in H band 2009 lació de Pegàs. paper   arxiv, Exoplanet Atmospheres The HR 8799 system harbors four super-Jupiters orbiting with periods that range from decades to centuries. ApJL, 809, L33 2015 2013 This planet is very similar in mass and size to HR 8799 d.  It orbits further out at about 38 AU (5.6 billion km or 3.5 billion miles), and completes one orbit every 190 years or so. It was in 2008 that Marois and his colleagues discovered the first three of HR 8799’s planets – HR 8799 b, c and d – using direct imaging technique. CURIE Th., GUYON O., LOZI J., GROFF T., KASDIN J. et al. The spectrum, with a signal-to-noise ratio of $\approx 5$ per spectral channel, is compatible with a late-type L brown dwarf. It is estimated at 1.47 times the mass, and 1.34 times the diameter, of the Sun. arxiv  arxiv   & ACEITUNO F. Its surface temperature is a little lower than the other three planets at about 800K to 900K. paper   Infra-red photograph taken using a part of the Hale telescope's mirror. & MAROIS Ch. De Rosa,4 Jonathan Aguilar,5 Julien Rameau,6 Travis Barman,7 Christian Marois,8,9 Mark S. Marley,10 Quinn Konopacky,11 Abhijith Rajan,12 Bruce Macintosh,3 Megan Ansdell,4 Pauline Arriaga,13 Vanessa P. Bailey,14 Joanna … Spa. & FREEDMAN R. preprint, The Debris Disk Around HR 8799 MNRAS, accepted paper, Thermal Infrared MMTAO Observations of the HR 8799 Planetary System The warm (150ºK) inner dust disk starts at around 5 AU from the star, and extends out to the orbit of the inner planet HR 8799 e. This planet was discovered in November of 2010, and while it weighs around 7 to 9 times the mass of Jupiter, it is only about 20% larger in diameter. ApJ. 2009 Astron. It has roughly 1.5 times the Sun's mass and 4.9 times its luminosity. 2010 in "14th Australian Space Research Conference" MNRAS, submitted 2017 2010 paper   arxiv   ADS, Clouds and Chemistry in the Atmosphere of Extrasolar Planet HR8799b A larger sample from photometric distances SERABYN G., MAWET D. & BURRUSS R. MAROIS Ch., ZUCKERMAN B., KONOPACKY Q., MACINTOSH B. DODSON-ROBINSON S., VERAS D., FORD E. & BEICHMAN C. 2018 2009 Credit & Copyright:  Christian Marois, Keck Observatory. DONNISON J. paper  arxiv, Masses, Radii, and Cloud Properties of the HR 8799 Planets Letters, 730, L21 HR 8799 e is the nearest Jovian planet to the star HR 8799, although she is the closest, is between the orbits of Saturn and Uranus at 14.5 AU, so she is far away, she is very shy, her best friend is her mother/sister HR 8799, and she does not like HR 8799 because she's too arrogant and vain. 2018 "LBT observations of the HR 8799 planetary system". paper   arxiv, Estimation of the XUV radiation onto close planets and their evaporation paper, H band Image of a Planetary Companion around HR 8799 in 2002 MOYA A., AMADO J., BARRADO D., GARCIA HERNANDEZ A., ABERASURI M., MONTESINOS B. Too faint to have a proper or Greek letter name, or even a Flamsteed number, it is known best by its numbers in the Bright Star(HR) and the Henry Draper (HD) Catalogues. HR 8799 Orbiting Exoplanets.gif 720 × 720; 980 KB. New constraints on the HR 8799 planetary system from mid-infrared direct imaging 2019 PETIT dit de la ROCHE D., van den ANKER M., KISSLER-PATIG M., IVANOV V. & FEDELE D. MNRAS, 491, 1795 The star is a Gamma Doradus variable: its luminositychanges because of non-radial pulsations … HR 8799 HR 8799 je přibližně 30 milionů let stará hvězda hlavní posloupnosti v souhvězdí Pegase, vzdálená 129 světelných roků (39,6 parseků) od Země. R., BARMAN, T. & 2 additional authors It is for me the beginning of a brand new area of compositional research. Science, 322, 1335 2016 Dynamical studies can also provide constraints on the planets' masses, which … arxiv, Formation of Giant Planets by Disk Instability on Wide Orbits Around Protostars with Varied Masses paper   & GILLON M. SPIE Astronomical Telescopes and Instrumentation Letters, 902, L40 arxiv, Modeling Exoplanet Atmospheres: What do We Really Know? 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