World’s most comprehensive interactive database of extrasolar planets updated daily since 1995. Detailed information on planet ISO 1I/’Oumuamua orbiting around star Sun.
The Extrasolar Planet Encyclopaedia — ISO 1I/'Oumuamua . Home All Catalogs Diagrams Bibliography Research Meetings Other Sites VO Planet ISO 1I/'Oumuamua Name ISO 1I/'Oumuamua Planet Status Confirmed Discovered in 2017 Mass — Mass*sin(i) — Semi-Major Axis — Orbital Period — Eccentricity 1.196 (± 0.004) ω 241.5 (± 0.3) deg Tperi 2458055.0 JD Radius 2e-06 RJ Inclination — Update 2022-11-14 Detection Method Imaging Mass Detection Method — Radius Detection Method Theoretical Primary transit — Secondary transit — λ — Impact Parameter b — Time Vr=0 — Velocity Semiamplitude K — Calculated temperature — Measured temperature — Hottest point longitude — Geometric albedo — Surface gravity log(g/gH) — Alternate Names 1I/2017_U1, 'Oumuamua Star Sun Name Sun Distance — Spectral type Apparent magnitude V — Mass 1.0 MSun Age — Effective temperature — Radius 1.0 RSun Metallicity [Fe/H] — Detected Disc — Magnetic Field — RA2000 00:00:00.0 Dec2000 +00:00:00 Alternate Names Planetary system 2 planets More data Simbad Most recent references (ADS) Observability Predictor Remarks 04 Mar 2022 Can We Still Send a Probe to Oumuamua ? (Marshall Eubanks) 14 Aug 2020 Video Trajectory of Lyra to 1I/'Oumuamua 29 Nov 2017 Trajectory Incoming direction: RA=18h 42, DEC=+34.3 deg (Meech et al. 2017) Perihelion: 0.25 AU (9 Sept2017) Outgoing direction: RA=23h 52, DEC=24.8 deg (Meech et al.2017) Physical properties Dimensions: 400 m x 40 m, assuming an albedo 0.04 (Meech et al. 2017), Rotation period: 7.34 hours (Meech et al. 2017). Spectrum: redish (Bannister et al. 2017) 17 Nov 2017 Currently, the "ccordinates" allowed by the structure of tha catalogue are those of the Sun. Later on, as the asteroid will be sufficiently distant from the Sun, its real coordinates, varying slowly, will be updated from time to time. 13 Nov 2017 Although it is not a planet in the IAU sense, it is of interest for exoplanet.eu (like planetary disks) since it provides informations on planetary systems it general. 08 Nov 2017 Spitzer DDT Proposal (Trilling et al.) 08 Nov 2017 Rotation period at least 5h. and axial ratio is at least 3:1 (Knight et al. 2017) 08 Nov 2017 Incoming direction RA, Dec=280.14,+34.15 (Mamajek 2017) 02 Nov 2017 Although detected by direct imaging inside the Solar System, its eccentricity larger than 1 (de la Fuente Marcos C. & R. 2017) makes it an intertsellar substellar object. Its perihelion is 0.25 AU. Related publications Interstellar planetesimals: potential seeds for planet formation? 2022 MORO-MARTIN A. & NORMAN C. ApJ, 924, 96 paper arxiv Arguing About Extraterrestrial Intelligence 2022 COWIE Ch. Philos. Quarterly, in press paper High-performance solar sails for interstellar object rendezvous 2022 MILLER D., DUVIGNEAUD F., MENKEN W., LANDAU D. & LINARES R. Acta Astronaut., 200, 242 paper Misaligned circumbinary disks as efficient progenitors of interstellar asteroids 2022 CHILDS A. & MARTIN R. ApJ. Letters, accepted arxiv Seismology in the solar system 2022 STÄHLER S. & KNAPMEYER M. Adv. in Geophysi., 63, 9 paper Interstellar Object Encounter Trade Space Exploration 2022 DONITZ B., MAGOS D., LANDAU D., MAYDAN J., CASTILLO-RODRIGUZ J. et al. 2022 IEEE Aerospace Conference (AERO) paper The Population of Interstellar Objects Detectable with the LSST and Accessible for In Situ Rendezvous with Various Mission Designs 2022 HOOVER D., SELIGMAN D. & PAYNE M. Plan. Sci. J., 3, 71 paper arxiv Observable tests for the light-sail scenario of interstellar objects 2022 ZHOU W.-H., LIU Sh.-F., & LIN D. Astron. & Astrophys., 667, A108 paper arxiv Overview of the Galileo Project 2022 LOEB A. J. Astron. Instr., accepted arxiv The Interstellar Interlopers 2022 JEWITT D. & SELIGMAN D. ARA&A, accepted arxiv Optimum Location to Intercept Interstellar Objects with Build-and-wait Missions 2022 LOPEZ LLOBET L. & HEIN A. Acta Astronaut., to be submitted arxiv A Fast Response Mission to Rendezvous with an Interstellar Object 2022 GARBER D., FRIEDMAN L., DAVOYAN A., TURYSHEV S., MELAMED et al. Exp. Astron., 53, 945 paper arxiv The Inferred Abundance of Interstellar Objects of Technological Origin 2022 EZELL C. & LOEB A. arxiv Orbital characterization of superbolides observed from space: Dynamical association with near-Earth objects, meteoroid streams and identification of hyperbolic projectiles 2022 PEÑA-ASENSIO E., TRIGO-RODRIGUEZ J. & RIMOLA A. Astron. J., 164, 76 paper arxiv Assessing Potential Contributions from Outgassing and Tidal Effects on the Evolving Rotational State of 1I/'Oumuamua 2022 TAYLOR A., SELIGMAN D., MACAYEAL D., HAINAUT O. & MEECH K. Astron. J., submitted arxiv Interstellar Object Accessibility and Mission Design 2022 DONITZ B., MAGES D., TSUKAMOTO H., DIXON P., LANDAU D. et al. IEEE Aerospace Conference, accepted arxiv Mission Concept for the Exploration of Interstellar Bodies 2022 BIELLA M. & THANGAVELAUTHAM J. in TECH.EXPL-23: Probing the Solar System's Edge and Beyond, AIAA 2022-4340 paper Physical Considerations for an Intercept Mission to a 1I/'Oumuamua-like Interstellar Object 2022 SIRAJ A., LOEB A., MORO-PARTIN A., ELOWITZ M., WHITE A. et al. J. Astron. Instr., accepted arxiv On the Possibility of an Artificial Origin for ‘Oumuamua 2022 LOEB A. Astrobiology, 22, 1392 paper Some Pertinent Issues for Interstellar Panspermia Raised after the Discovery of 1I/‘Oumuamua 2022 DESCH S. & JACKSON A. Astrobiology, 22, 1400 paper ‘Oumuamua Is Not a Probe Sent to Our Solar System by an Alien Civilization 2022 ZUCKERMAN B. Astrobiology, 22, 1414 paper The ‘Oumuamua Controversy: Bayesian Priors and the Evolution of Technological Intelligence 2022 LINEWEAVER Ch. Astrobiology, 22, 1419 paper Interstellar Now! Missions to and Sample Returns from Nearby Interstellar Objects 2022 HEIN A., EUBANKS M., LINGAM M., HIBBERD A., FRIES D. et al. Advances in Spa. Res., 69, 402 paper arxiv Intermediate Points for Missions to Interstellar Objects Using Optimum Interplanetary Trajectory Software 2022 HIBBERD A. JBIS, submitted arxiv Project Lyra: Another Possible Trajectory to 1I/'Oumuamua 2022 HIBBERD A. arxiv Interstellar planetesimals 2022 MORO-MARTIN A. in "Planetary systems now", edited by Luisa M. Lara and David C. Jewitt, arxiv Inferring Late Stage Enrichment of Exoplanet Atmospheres from Observed Interstellar Comets 2022 SELIGMAN D., BECKER J., ADAMS F., FEINSTEIN A. & ROGERS L. ApJ. Letters, 933, L7 paper arxiv Free-Floating Planets, the Einstein Desert, and 'Oumuamua 2022 GOULD A., JUNG Y., HWANG K.-H., DONG S., ALBROW M. et al. JKAS, submitted arxiv Discerning between different 'Oumuamua models by optical and infrared observations 2022 LEKKOY E. & BRODIN J. ApJ. Letters, 925, L11 paper arxiv Project Lyra: A Mission to 1I/'Oumuamua without Solar Oberth Manoeuvre 2022 HIBBERD A., HEIN A., EUBANKS M. & KENNEDY R. III Acta Astronaut., 199, 161 paper arxiv Capture of interstellar objects I: the capture cross-section 2022 DEHNEN W. & HANDS Th. MNRAS, 512, 4062 paper arxiv Capture of interstellar objects II: By the Solar system 2022 DEHNEN W., HANDS Th. & SCHÖNRICH R. MNRAS, 512, 4078 paper arxiv Research Programs Arising from 'Oumuamua Considered as an Alien Craft 2022 ELVIS M. Int. J. Astrobiol., 21, 63 paper arxiv Identifying Interstellar Object Impact Craters 2022 CABOT S. & LAUGHLIN G. Plan. Sci. J., 3, 172 paper arxiv An Interstellar Visitor: sorting the fact from the speculation 2021 AYLWARD A. Principium, 32, 53 paper Project Lyra: Catching 1I/'Oumuamua Using Nuclear Thermal Rockets 2021 HIBBERD A. & HEIN A. Acta Astronaut., 179, 594 paper arxiv Video The New Astronomical Frontier of Interstellar Objects 2021 SIRAJ A. & LOEB A. Astrobiology, accepted arxiv On the Possibility of an Artificial Origin for `Oumuamua 2021 LOEB A. Astrobiology, submitted arxiv Diffusion Gravity (9) Direct Evidence for MOND and Asymmetric Near-Field Gravity from the Solar Flyby of 1I/2017 U1 2021 FULTON D. ResearchGate On the Fate of Interstellar Objects Captured by our Solar System 2021 NAPIER K., ADAMS F. & BATYGIN K. Plan. Sci. J., 2, 217 paper arxiv Bridge to the stars: A mission concept to an interstellar object 2021 COURVILLE S., MOORE K., CONNOUR K., FERGUSON S., AGRAWAL R. et am. LPI Conf. 2020, 1766 paper Bridge to the stars: A mission concept to an interstellar object 2021 MOORE K., COURVILLE S., FERGUSON S., SCOENFELD A., LLERA K. et al. Plan. & Spa. Sci., 197, 105137 paper Erosion of Icy Interstellar Objects by Cosmic Rays and Implications for `Oumuamua 2021 MINH PHAN V., HOANG Th. & LOEB A. ApJ, submitted arxiv Interstellar objects outnumber Solar system objects in the Oort cloud 2021 SIRAJ A. & LOEB A. MNRAS Letters, 507, L16 paper Constraints on the Occurrence of 'Oumuamua-Like Objects 2021 LEVINE W., CABOT S., SELIGMAN D. & LAUGHLIN G. ApJ, 922, 39 paper arxiv On The Spin Dynamics of Elongated Minor Bodies with Applications to a Possible Solar System Analogue Composition for `Oumuamua 2021 SELIGMAN D., LEVINE G., CABOT S., LAUGHLIN G. & MEECH K. ApJ, 920, 28 paper arxiv The ‘Oumuamua controversy 2021 COWIE Ch. Nature Astronomy, 5, 526 paper The Comet Interceptor Mission 2021 JONES G., SNODGRASS C. & TUBIANA C. EGU 2021, EGU21-15188 ADS Interstellar objects follow the collapse of molecular clouds 2021 PFALZNER S., PATERSON D., BANNISTER M. & PORTEGIES ZWART S. ApJ, accepted arxiv Hyperspeed penetrator to deliver research equipment to interstellar wanderers 2021 BAGROV A., LEONOV V., LEUN E., POLYAKOV A. & SYSOEV V. AIP Conf. Proc., 2318, 190002 paper Evidence Suggesting that 'Oumuamua is the ~30 Myr-old product of a Molecular Cloud 2021 HSIEH Ch.-H., LAUGHLIN G. & ARCE H. ApJ, 917, 20 paper arxiv 'Oumuamua as a light sail -- evidence against artificial origin 2021 CURRAN S. Astron. & Astrophys., in press paper arxiv Black Swans in Astronomical Data 2021 KIPPING D. MNRAS, 504, 4054 paper arxiv The NAROO digitization center. Overview and Scientific program 2021 ROBERT V., DESMARS J., LAINEY V., ARLOT J.-E., PERLBARG A.-C. et al. Astron. & Astrophys., 652, A3 paper Significant interstellar object production by close stellar flybys 2021 PFALZNER S., VARGAS L., BHANDARE A. & VERAS D. Astron. & Astrophys., 651, A38 paper arxiv To see a world in a shard of ice: ‘Oumuamua as a fragment of n2 ice from an exopluto 2021 JACKSON A. & DESCH S. 52nd Lunar & Planetary Science Conf., 2548 paper The Mass Budget Necessary to Explain `Oumuamua as a Nitrogen Iceberg 2021 SIRAJ A. & LOEB A. ApJ. Lett., submitted arxiv How to Photograph a (Possible) Alien Artifact 2021 LOEB A. Sci. Amer., March 22, 2021 paper Was the Interstellar Object 'Oumuamua a Nitrogen Iceberg? 2021 LOEB A. Sci. Amer., March 19 2021 paper 1I/'Oumuamua as an N2 ice fragment of an exo-Pluto surface: I. size and compositional constraints 2021 JACKSON A. & DESCH S. JGR Planets, 126, e2020JE006706 paper arxiv 1I/'Oumuamua as an N2 ice fragment of an exo-pluto surface. II. Generation of N2 ice fragments and the origin of 'Oumuamua 2021 JACKSON A. & DESCH S. JGR Planets, 126, e2020JE006807 paper arxiv From the SpaceX Starlink megaconstellation to the search for Type-I civilizations 2021 OSMANOV Z. arxiv Oumuamua Is Not a Probe Sent to our Solar System by an Alien Civilization 2021 ZUCKERMAN B. Astron. J., submitted arxiv Assessing the Formation of Solid Hydrogen Objects in Starless Molecular Cloud Cores 2021 LEVIN G. & LAUGHLIN G. ApJ, accepted arxiv Interstellar Objects in the Solar System: 1. Isotropic Kinematics from the Gaia Early Data Release 3 2021 EUBANKS M., HEIN A., LINGAM M., HIBBERD A., FRIES D. et al. Astron. J., submitted arxiv On the Capture of Interstellar Objects by our Solar System 2021 NAPIER K., ADAMS F. & BATYGIN K. Plan. Sci. J., 2, 53 paper arxiv `Oumuamua is not Artificial 2021 KATZ J. arxiv Iterative Lambert’s Trajectory Optimization for Extrasolar Bodies Interception 2021 HERRERO A., MOLL S., MORAÑO J.-A., VAZQUEZ D. & VEGA E. Aerospace, 8, 366 paper Oumuamuas passing through molecular clouds 2020 PFALZNER S., DAVIES M., KOKAIA G. & BANNISTER M. ApJ, 903, 114 paper arxiv The Scientific Impact of the Vera C. Rubin Observatory's Legacy Survey of Space and Time (LSST) for Solar System Science 2020 JONES R., BANNISTER M., BOLIN B., CHANDLER C., CHESLEY S. et al. White paper submitted to the 2020 Planetary Astronomy Decadal Survey arxiv Transformative Planetary Science with the US ELT Program 2020 WONG M., MEECH K., DICKINSON M., GREATHOUSE Th., CARTWRIGHT R. et al. White Paper submitted to the 2023-2032 Planetary Science and Astrobiology Decadal Survey arxiv Constraining the orientation of the spin axes of extrasolar minor bodies 1I/2017 U1 (`Oumuamua) and 2I/Borisov 2020 de la FUENTE MARCOS C. & de la FUENTE MARCOS R. Astron. & Astrophys., 643, A18 paper arxiv Detecting Interstellar Objects Through Stellar Occultations 2020 SIRAJ A. & LOEB A. ApJ. Letters, 891, L3 paper arxiv 'Oumuamua as a Cometary Fractal Aggregate: the "Dust Bunny" Model 2020 LUU J., FLEKKOY E. & TOUSSAINT R. Astron. J., submitted arxiv Exobodies in Our Back Yard: Science from Missions to Nearby Interstellar Objects 2020 EUBANKS M., SCHNEIDER J., HEIN A., HIBBARD A. & KENNEDY R. BAAS, 53, 292 paper arxiv Interstellar Now! Missions to and Sample Returns from Nearby Interstellar Objects 2020 HEIN A., EUBANKS M., HIBBERD A., FRIES D., SCHNEIDER J. et al. White Paper to the 2023-2032 Planetary Science and Astrobiology Decadal Survey, submitted arxiv Relaxation of Viscoelastic Tumblers with Application to 1I/2017 (‘Oumuamua) and 4179 Toutatis 2020 KWIECINSKI J. MNRAS, 497, 19 paper Project Lyra: Catching 1I/'Oumuamua -- Using Laser Sailcraft in 2030 2020 HIBBERD A. & HEIN A. arxiv Destruction of molecular hydrogen ice and Implications for 1I/2017 U1 (`Oumuamua) 2020 HOANG Th. & LOEB A. ApJ. Letters, 899, L23 paper arxiv Evidence that 1I/2017 U1 (`Oumuamua) was composed of molecular hydrogen ice 2020 SELIGMAN D. & LAUGHLIN G. ApJ. Letters, 896, L8 paper arxiv Possible Interstellar meteoroids detected by the Canadian Meteor Orbit Radar 2020 FRONCISZ M., BROWN P. & WERYK R. Plan. Spa. Sci., 190, 104980 paper arxiv Retrograde orbits excess among observable interstellar objects 2020 MARCETA D. & NOVAKOVIC B. MNRAS, 498, 5386 paper arxiv Relaxation of Viscoelastic Tumblers with Application to 1I/2017 (`Oumuamua) and 4179 Toutatis 2020 KWIECINSKI J. arxiv Capture of interstellar objects: a source of long-period comets 2020 HANDS T. & DEHNEN W. MNRAS, 493, L59 paper arxiv Potential Backup Targets for Comet Interceptor 2020 SCHWAMB M., KNIGHT M., JONES G., SNODGRASS C., BUCCI L. et al. Res. Notes AAS, 4, 21 paper arxiv The Design of a Space-based Observation and Tracking System for Interstellar Objects 2020 NALLAPU R., XU Y., MARQUEZ A., SCHULER T. & THABGAVELAUTHAM J. AAS GNC Conferences 2020 arxiv On the aspect ratio of Oumuamua: less elongated shape for irregular surface properties 2020 VAZAN A. & SARI R. MNRAS, 493, 1546 paper arxiv Hyperbolic Orbits in the Solar System: Interstellar Origin or Perturbed Oort Cloud Comets? 2020 HIGUCHI A. & KOKUBO E. MNRAS, 492, 268 paper arxiv Observable Signatures of the Ejection Speed of Interstellar Objects from their Birth Systems 2020 SIRAJ A. & LOEB A. ApJ. Letters, 903, L20 paper arxiv 'Oumuamua's Rotation with the Mechanical Torque Produced by Interstellar Medium 2019 ZHOU W.-H. ApJ, 899, 42 paper arxiv Project Lyra: Sending a Spacecraft to 1I/'Oumuamua (former A/2017 U1), the Interstellar Asteroid 2019 HEIN A., PERAKIS N., EUBANKS M., HIBBERD A., CROWL A. et al. Acta Astronaut., 161, 552 paper arxiv Turning up the heat on `Oumuamua 2019 FORBES J. & LOEB A. ApJ. Letters, 875, L23 paper arxiv The fate of planetesimal discs in young open clusters: implications for 1I/'Oumuamua, the Kuiper belt, the Oort cloud and more 2019 HANDS Th., DEHNEN W., GRATION A., STADEL J. & MOORE B. MNRAS, 490, 21 paper arxiv Identifying Interstellar Objects Trapped in the Solar System through Their Orbital Parameters 2019 SIRAJ A. & LOEB A. ApJ. Letters, 870, L10 paper arxiv 'Oumuamua's Geometry Could Be More Extreme than Previously Inferred 2019 SIRAJ A. & LOEB A. Res. Notes AAS, 3, 15 paper Could 1I/'Oumuamua be an icy fractal aggregate ejected from a protoplanetary disk? A fluffy radiation-pressure-driven scenario 2019 MORO-MARTIN A. ApJ. Letters, 872, L32 paper arxiv On the Anomalous Acceleration of 1I/2017 U1 `Oumuamua 2019 SELIGMAN D., LAUGHLIN G. & BATYGIN K. ApJ. Letters, 876, L26 paper arxiv Collisional Elongation: Possible Origin of Extremely Elongated Shape of 1I/`Oumuamua 2019 SUGIURA K., KOBAYASHI H. & INUTSUKA Sh-I. Icarus, accepted arxiv 1I/`Oumuamua and the Problem of Survival of Oort Cloud Comets Near the Sun 2019 SEKANINA Z. Astron. J., submitted arxiv Fast Radio Bursts from Terraformation 2019 YALINEWICH A., RAHMAN M., OBERTAS A. & BREYSSE P. MNRAS, submitted arxiv Evidence against non-gravitational acceleration of 1I/2017 U1 `Oumuamua 2019 KATZ J. Astrophys. & Spa. Sci., 364, 51 paper arxiv Outgassing As Trigger of 1I/`Oumuamua's Nongravitational Acceleration: Could This Hypothesis Work at All? 2019 SEKANINA Z. ApJ, submitted arxiv Modeling the light curve of `Oumuamua: evidence for torque and disc-like shape 2019 MASHCHENKO S. MNRAS, 489, 3003 paper arxiv Probing Extrasolar Planetary Systems with Interstellar Meteors 2019 SIRAJ A. & LOEB A. ApJ. Letters, submitted arxiv The natural history of ‘Oumuamua 2019 BANNISTER M., BHANDARE A., DYBCZYNSKI P., FITZSIMMONS A., GUILBERT-LEPOUTRE A. et al. Nature Astronomy, 3, 594 paper arxiv Hidden Planets: Implications from 'Oumuamua and DSHARP 2019 RICE M. & LAUGHLIN G. ApJ. Letters, 884, L22 paper arxiv Radio Flares from Collisions of Neutron Stars with Interstellar Asteroids 2019 SIRAJ A. & LOEB A. Res. Notes AAS, 3, 130 paper The interstellar object 'Oumuamua as a fractal dust aggregate 2019 FLEKKOY E., LUU J. & TOUSAINT R. ApJ. Letters, 885, L41 paper arxiv New Insights into Interstellar Object 1I/2017 U1 (`Oumuamua) from SOHO/STEREO Nondetections 2019 HUI M.-T. & KNIGHT M. Astron. J., 158, 256 paper arxiv The Dynamics of Interstellar Asteroids and Comets within the Galaxy: an Assessment of Local Candidate Source Regions for 1I/`Oumuamua and 2I/Borisov 2019 HALLATT T. & WIEGERT P. Astron. J., submitted arxiv Initial Characterization of Interstellar Comet 2I/2019 Q4 (Borisov) 2019 JEWITT D. & LUU J. ApJ. Letters, 886, L29 paper High-drag Interstellar Objects and Galactic Dynamical Streams 2019 EUBANKS T. ApJ. Letters, 874, L11 paper It Takes a Village to Declassify an Error Bar 2019 LOEB A. Sci. Amer., 3 Jul. 2019 paper Search for OH 18-cm radio emission from 1I/2017 U1 with the Green Bank telescope 2018 PARK R., PISANO D., LAZIO J., CHODAS P. & NAIDU Sh. Astron. J., 155, 185 paper arxiv Spitzer Observations of Interstellar Object 1I/`Oumua… truncated (9,909 more characters in archive)