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Star in the constellation Pegasus
HR 8799 is a roughly 42 million-year-old main-sequence star located 133.3 light-years (40.9 parsecs) away from Earth in the constellation of Pegasus.
HR_8799
Jovian planet orbiting HR 8799
HR 8799 e is a large exoplanet, orbiting the star HR 8799, which lies 129 light-years from Earth. This gas giant has 7.5 times the mass of Jupiter and
HR_8799_e
Jovian planet orbiting HR 8799
HR 8799 b is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis
HR_8799_b
Jovian planet orbiting HR 8799
HR 8799 d is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis
HR_8799_d
Jovian exoplanet orbiting HR 8799
HR 8799 c is an extrasolar planet located approximately 129 light-years away in the constellation of Pegasus, orbiting the 6th magnitude Lambda Boötis
HR_8799_c
Exoplanets confirmed or discovered from direct imaging
This list includes the four members of the multi-planet system that orbit HR 8799. It is unlikely or at least unclear if objects on a wide orbit (≥100 AU)
List of directly imaged exoplanets
List_of_directly_imaged_exoplanets
Stellar classification
star systems known to feature planets include HD 15082, Beta Pictoris and HR 8799. Examples of A-type main-sequence stars with circumstellar disc and exoplanets:
A-type_main-sequence_star
Telescope in the Atacama Desert, Chile
Interferometer (VLTI), announced the first direct detection of an exoplanet, HR 8799 e, using optical interferometry. In 2024, AES Andes, a utility company,
Very_Large_Telescope
German astronomer
exoplanet by optical interferometry - Astrometry and K-band spectroscopy of HR 8799 e". Astronomy & Astrophysics. 623: L11. arXiv:1903.11903. Bibcode:2019A&A
Frank_Eisenhauer
MacIntosh, Bruce (2023). "Deep Orbital Search for Additional Planets in the HR 8799 System". The Astronomical Journal. 165 (1): 29. arXiv:2210.14213. Bibcode:2023AJ
List_of_exoplanet_extremes
Interferometer (VLTI), announced the first direct detection of an exoplanet, HR 8799 e, using optical interferometry. By looking at the wiggles of an interferogram
Methods of detecting exoplanets
Methods_of_detecting_exoplanets
Lafrenière, D. (2010-02-10). "SPATIALLY RESOLVED SPECTROSCOPY OF THE EXOPLANET HR 8799 c". The Astrophysical Journal. 710 (1): L35–L38. arXiv:1001.2017. Bibcode:2010ApJ
List_of_exoplanet_firsts
American astrophysicist
directly imaged planets) around HR 8799 and a 2010 paper discovering a fourth imaged planet in the system: HR 8799 e. In 1982, Zuckerman co-edited a book
Benjamin_Zuckerman
List of largest planets by size
2024). "Four-of-a-kind? Comprehensive atmospheric characterisation of the HR 8799 planets with VLTI/GRAVITY". Astronomy & Astrophysics. 687: A298. arXiv:2404
List_of_largest_exoplanets
Boisse, I.; Hébrard, G.; Jehin, E.; Lister, T.; Lovis, C.; Maxted, P. F. L.; Pepe, F.; Pollacco, D.; Ségransan, D.; Simpson, E.; Udry, S.; West, R. (2011)
List of exoplanets discovered in 2010
List_of_exoplanets_discovered_in_2010
more massive field brown dwarfs and young L/T transition exoplanets like HR 8799 d. Ground-based high-resolution spectroscopy reveals evidence for water
HIP_99770_b
Stars with distinctly unusual metal abundances
whose host stars are chemically peculiar stars. The young variable star HR 8799, which hosts four directly imaged massive planets, belongs to the group
Chemically_peculiar_star
Interferometer (VLTI), announce the first direct detection of an exoplanet, HR 8799 e, using optical interferometry. Chinese scientists report inserting the
2019_in_science
Binary star system in the constellation Andromeda
0.860±0.051 M☉ Other designations 48 Andromedae, BD+44°307, FK5 1040, HD 8799, HIP 6813, HR 417, SAO 37228, PPM 44006 Database references SIMBAD data
Omega_Andromedae
Circumbinary planetary-mass object orbiting ROXs 42B
age of the star, similar to the masses of directly imaged planets around HR 8799 and beta Pictoris. However, it is unclear whether ROXs 42Bb formed like
ROXs_42Bb
Star in the constellation Microscopium
99–110. Bibcode:1966CoLPL...4...99J. Jofré, E.; Petrucci, R.; Saffe, C.; Saker, L.; Artur de la Villarmois, E.; Chavero, C.; Gómez, M.; Mauas, P. J. D.
Alpha_Microscopii
ISSN 0067-0049. S2CID 16850733. Oppenheimer, B. R. (2013). "Reconnaissance of the HR 8799 Exosolar System I: Near IR Spectroscopy". The Astrophysical Journal. 768
J_band_(infrared)
Planet outside of the Solar System
Moon. The most massive exoplanet listed on the NASA Exoplanet Archive is HR 2562 b, about 30 times the mass of Jupiter. However, according to some definitions
Exoplanet
Disk of dust and debris in orbit around a star
exoplanet-hosting stars, including the first discovered by direct imaging (HR 8799), are known to also host debris disks. The nearby star 55 Cancri, a system
Debris_disk
Class of 60 American 2-6-6-6 locomotives
technology, and came equipped with front-end multiple valve throttles, type E superheaters, schedule 8-ET brakes, low water alarms, continuous blowdown
Chesapeake_and_Ohio_class_H-8
Young star system in the constellation Taurus
Archive and Extrasolar Planets Encyclopaedia. 2MASS SCR 1845−6357 2M1207 HR 8799 Based on the estimated temperature and luminosity via the Stefan-Boltzmann
2MASS_J0441+2301
Astronomical objects colder than red dwarfs
considered an exoplanet. More close-in planets, such as the planets around HR 8799 and Kappa Andromedae b also resemble L-dwarfs or have an L spectral type
L_dwarf
Stellar association
image of the planets. The most famous star in the Columba association is HR 8799 which has four directly imaged planets. The group was at first not recognized
Columba_association
Star in the constellation Pegasus
4868Ab BD+14 4559 b (Pirx) HAT-P-8b HD 209458 b HD 210702 b HD 219828 b HR 8799 b c d e V391 Pegasi b WASP-10b Star clusters Balbinot 1 Messier 15 NGC 7772
Sigma_Pegasi
Type of variable star
Bibcode:1995IBVS.4170....1R. Gray, Richard O.; Kaye, Anthony B. (1999). "HR 8799: A Link between γ Doradus Variables and λ Bootis Stars". The Astronomical
Gamma_Doradus_variable
procedure for calls within a state for these states would also be simplified, i.e. dialing of mobile-to mobile subscribers and fixed-to-mobile subscribers would
Mobile telephone numbering in India
Mobile_telephone_numbering_in_India
White dwarf in the constellation Pegasus
detected Tremblay, P. -E.; Hollands, M. A.; Gentile Fusillo, N. P.; McCleery, J.; Izquierdo, P.; Gänsicke, B. T.; Cukanovaite, E.; Koester, D.; Brown,
WD_2317+1830
Brown dwarf system
Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO 2 in the HR 8799 and 51 Eri Exoplanets' Atmospheres". The Astronomical Journal. 169 (4):
2MASSW_J2148+4003
Star in the constellation Boötes
massive gas giants (the other is the system of planets around the young star HR 8799). Kane, Stephen R. (2023). "Surrounded by Giants: Habitable Zone Stability
HD_141399
Exoplanet orbiting the young HD 95086
trends seen for other young, directly imaged planets like those around HR 8799. In particular, the lower limit of its 1.65–3.8 μm color of 3.1 magnitudes
HD_95086_b
Triple star system in the constellation Piscis Austrinus
a United States navy amphibious cargo ship. Exoasteroid 2M1207 GJ 758 HR 8799 Direct imaging of extrasolar planets Lists of exoplanets List of star systems
Fomalhaut
Astronomical imaging project at Palomar Observatory
David W.; King, D.; Ligon, E. R. (2013-04-10). "Reconnaissance of the Hr 8799 Exosolar System. I. Near-Infrared Spectroscopy". The Astrophysical Journal
Project_1640
Star in the constellation Pegasus
previously claimed planet candidate is an artifact of stellar activity. Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy
Gliese_880
Gray, R. O.; Corbally, C. J.; Garrison, R. F.; McFadden, M. T.; Robinson, P. E. (October 2003). "Contributions to the Nearby Stars (NStars) Project: Spectroscopy
List of star systems within 100–150 light-years
List_of_star_systems_within_100–150_light-years
Constellation in the northern celestial hemisphere
vapor beyond the Solar System, while extrasolar planets orbiting the star HR 8799 also in Pegasus are the first to be directly imaged. V391 Pegasi is a hot
Pegasus_(constellation)
Extrasolar planet
Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO2 in the HR 8799 and 51 Eri Exoplanets' Atmospheres". The Astronomical Journal. 169 (4):
51_Eridani_b
Psychoactive drug, often called ecstasy
Springer US. pp. 1–20 (2, 14). doi:10.1007/978-1-4613-1485-1_1. ISBN 978-1-4612-8799-5. Retrieved 15 May 2025. Alles GA (1959). "Some Relations Between Chemical
MDMA
Star in the constellation Telescopium
disks stars β Pic, AU Mic, 49 Cet, η Tel, Fomalhaut, g Lup, HD 181327 and HR 8799". Astronomy and Astrophysics. 595: A31. arXiv:1606.08498. Bibcode:2016A&A
HD_181327
Star in the constellation Centaurus
C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars)
HD_114613
Instrument at the Very Large Telescope
C.; Hill, J. M.; Miller, D.; Paris, D.; Pinna, E.; et al. (2012). "LBT observations of the HR 8799 planetary system". Astronomy & Astrophysics. 549:
Spectro-Polarimetric High-Contrast Exoplanet Research
Spectro-Polarimetric_High-Contrast_Exoplanet_Research
C. J.; Garrison, R. F.; McFadden, M. T.; Bubar, E. J.; McGahee, C. E.; O'Donoghue, A. A.; Knox, E. R. (2006). "Contributions to the Nearby Stars (NStars)
List of star systems within 65–70 light-years
List_of_star_systems_within_65–70_light-years
Catalogues". Retrieved 26 December 2006. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". Retrieved 26 December 2006. Roman, N. G
List_of_stars_in_Andromeda
Effective provisional control of one sovereign power over another sovereign's territory
Remembering the Fall of Portuguese India in 1961. Tribuna da Historia. ISBN 972-8799-53-5. "UNTEA and UNRWI: United Nations Involvement in West New Guinea During
Military_occupation
Star in the constellation Musca
stars with multiple super-jovian planets at moderate/wide separations like HR 8799. While other hypothetical planets have been claimed to exist around the
HD_100546
Instrument on HST
NICMOS image was processed to show a predicted exoplanet around the star HR 8799. The system is thought to be about 130 light-years from Earth. In 2011
Near Infrared Camera and Multi-Object Spectrometer
Near_Infrared_Camera_and_Multi-Object_Spectrometer
Algorithms for matrix decomposition
Christian; Doyon, René; Barman, Travis (2009). "HST/NICMOS Detection of HR 8799 b in 1998". The Astrophysical Journal Letters. 694 (2): L148. arXiv:0902
Non-negative matrix factorization
Non-negative_matrix_factorization
Extrasolar object orbiting Fomalhaut
slightly larger scales, comparable to the locations of the planets around HR 8799, any additional planets of Fomalhaut must have masses below about 2 to
Fomalhaut_b
Variable star in the constellation Pegasus
October 2022. Kazarovets, E. V.; Samus, N. N.; Durlevich, O. V.; Frolov, M. S.; Antipin, S. V.; Kireeva, N. N.; Pastukhova, E. N. (January 1999). "The
Phi_Pegasi
Main-belt asteroid
extrasolar planetary system, namely the first three planets orbiting the star HR 8799 in the constellation Pegasus. At the time of naming this asteroid, René
74503_Madola
Exoplanet
archived SINFONI spectrum of the exoplanet 2M1207b and spectra of the HR 8799 exoplanets. The object was studied in 2024 and the team concluded that
BD+60_1417b
Catalogues". ESA. 1997. Retrieved 2006-12-26. Kostjuk, N. D. (2002). "HD-DM-GC-HR-HIP-Bayer-Flamsteed Cross Index". cdsarc.u-strasbg.fr. Retrieved 2006-12-26
List_of_stars_in_Pegasus
5974 HR 8799 b 7.0 1.2 170000 68.0 1200 imaging 2008 128.51 1.51 7400 HR 8799 c 10.0 1.2 69000 38.0 1200 imaging 2008 128.51 1.51 7400 HR 8799 d 10.0
List of exoplanets discovered between 2000–2009
List_of_exoplanets_discovered_between_2000–2009
List of systems with multiple planets
(2019). "TESS Spots a Compact System of Super-Earths around the Naked-Eye Star HR 858". The Astrophysical Journal. 881 (1): L19. arXiv:1905.05193. Bibcode:2019ApJ
List of multiplanetary systems
List_of_multiplanetary_systems
A-type main sequence star in the constellation Cygnus
comparable to spin-orbit alignments seen for imaged planetary systems like HR 8799, AF Leporis and 51 Eridani. Its spin-orbit alignment and evidence for an
29_Cygni
Detecting planets located outside the Solar System
system in the process of formation. HR 8799: Also on November 13, the discovery of three planets orbiting HR 8799 was announced. This was the first direct
Discoveries_of_exoplanets
Antonio S.; Zurlo, Alice (2021-06-01). "A Detailed Characterization of HR 8799's Debris Disk with ALMA in Band 7". The Astronomical Journal. 161 (6):
List of resolved circumstellar disks
List_of_resolved_circumstellar_disks
Springer US. pp. 1–20. doi:10.1007/978-1-4613-1485-1_1. ISBN 978-1-4612-8799-5. Shulgin AT (1990). "Celebrating Gordon Wasson". In Riedlinger TJ (ed.)
Bibliography of Alexander Shulgin
Bibliography_of_Alexander_Shulgin
American award for outstanding scientific papers
Lafrenière, and René Doyon Direct Imaging of Multiple Planets Orbiting the Star HR 8799 2008 Anoop Kumar, James W. Godwin, Phillip B. Gates, A. Acely Garza-Garcia
Newcomb_Cleveland_Prize
HGNC:6647; P29536 8797 LMOD2 HGNC:6648; Q6P5Q4 8798 LMOD3 HGNC:6649; Q0VAK6 8799 LMTK2 HGNC:17880; Q8IWU2 8800 LMTK3 HGNC:19295; Q96Q04 8801 LMX1A HGNC:6653;
List of human protein-coding genes 4
List_of_human_protein-coding_genes_4
20th-century partial solar eclipse
Wednesday, April 17 and Thursday, April 18, 1996, with a magnitude of 0.8799. A solar eclipse occurs when the Moon passes between the Earth and the Sun
Solar eclipse of April 17, 1996
Solar_eclipse_of_April_17,_1996
Late March tornado outbreak
which departed New Orleans (NOL) on 3/30 is currently operating approx 5 hr late due to freight interference and debris on the tracks caused by weather
Tornado outbreak of March 29–31, 2022
Tornado_outbreak_of_March_29–31,_2022
Ji; et al. (20 November 2018). "Detecting Water in the Atmosphere of HR 8799 c with L-band High-dispersion Spectroscopy Aided by Adaptive Optics". The
2018_in_science
(2019). "TESS Spots a Compact System of Super-Earths around the Naked-Eye Star HR 858". The Astrophysical Journal. 881 (1): L19. arXiv:1905.05193. Bibcode:2019ApJ
List of exoplanets discovered in 2019
List_of_exoplanets_discovered_in_2019
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