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

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.

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2021 LEVIN G. & LAUGHLIN G.
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Detecting Interstellar Objects Through Stellar Occultations
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'Oumuamua as a Cometary Fractal Aggregate: the "Dust Bunny" Model
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2020 KWIECINSKI J.
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Destruction of molecular hydrogen ice and Implications for 1I/2017 U1 (`Oumuamua)
2020 HOANG Th. & LOEB A.
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Evidence that 1I/2017 U1 (`Oumuamua) was composed of molecular hydrogen ice
2020 SELIGMAN D. & LAUGHLIN G.
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Possible Interstellar meteoroids detected by the Canadian Meteor Orbit Radar
2020 FRONCISZ M., BROWN P. & WERYK R.
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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

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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
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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/`Oumuamua
2018 TRILLING D., MOMMERT M., HORA J., FARNOCCHIA D., CHODAS P. et al.
MNRAS, 156, 261
paper  arxiv  

Ice can survive an interstellar trip
2018 MEECH K.
Nature Astronomy, 2, 112
paper  

Rendezvous with `Oumuamua
2018 HAINAUT O., MEECH K., MICHELI M. & BELTON M.
The Messenger, 173, 13
paper  

Could Solar Radiation Pressure Explain 'Oumuamua's Peculiar Acceleration?
2018 BIALY Sh. & LOEB A.
ApJ. Letters, 868, L1
paper   arxiv  

Origin of 1I/'Oumuamua. II. An ejected exo-Oort cloud object?
2018 MORO-MARTIN A.
ApJ, submitted
arxiv  

Origin of 1I/'Oumuamua. I. An ejected protoplanetary disk object?
2018 MORO-MARTIN A.
ApJ, accepted
arxiv  

Plausible home stars of the interstellar object 'Oumuamua found in Gaia DR2
2018 BAILER-JONES C., FARNOCCHIA D., MEECH K., BRASSER R., MICHELI M. et al.
Astron. J., 156, 205
paper  arxiv  

Spin Evolution and Cometary Interpretation of the Interstellar Minor Object 1I/2017 'Oumuamua
2018 RAFIKOV R.
ApJ. Letters, 867, L17
paper  arxiv  

Radio SETI Observations of the Interstellar Object 'Oumuamua
2018 HARP, G., RICHARDS, J., JENNISKENS, P., SHOSTAK, S. & J. TARTER
ApJ, submitted
  arxiv   ADS  

A kinematical age for the interstellar object 1I/'Oumuamua
2018 ALMEIDA-FERNANDES, F. & H. ROCHA-PINTO
MNRAS, 480, 4903
paper   arxiv   ADS  

1I/2017 'Oumuamua-like Interstellar Asteroids as Possible Messengers from Dead Stars
2018 RAFIKOV, R.
ApJ, 861, 35
paper  

Non-gravitational acceleration in the trajectory of 1I/2017 U1 (‘Oumuamua)
2018 MICHELI M., FARNOCCHIA D., MEECH K., BUIE M., HAINAUT O. et al.
Nature, 558, 223
paper  

Planet seeding and lithopanspermia through gas-assisted capture of interstellar objects
2018 GRISHIN E., PERETS H. & AVNI Y.
Astron. J., 156, 253
paperarxiv  

Metal Pollution of Low-Mass Population III Stars through Accretion of Interstellar Objects like `Oumuamua
2018 TANIKAWA A., SUZUKI T. & DOI Y.
PASJ, submitted
arxiv  

Dust bombardment can explain the extremely elongated shape of 1I/'Oumuamua and the lack of interstellar objects
2018 VAVILOV D. & MEDVEDEV Y.
MNRAS, 484, L75
paper  arxiv  

The Excited Spin State of 1I/2017 U1 'Oumuamua
2018 BELTON M., HAINAUT O., MEECH K., MUELLER B., KLEYNA J., WEAVER H. et al.
ApJ. Letters, 856, L21
paper  arxiv  

The Feasibility and Benefits of In Situ Exploration of `Oumuamua-like objects
2018 SELIGMAN D. & LAUGHLIN G.
Astron. J., 155, 217
paper  arxiv  

Interstellar object 'Oumuamua as an extinct fragment of an ejected cometary planetesimal
2018 RAYMOND Sh., ARMITAGE Ph. & VERAS D.
ApJ Lett, 856, L7
paper  arxiv  

A Serendipitous MWA Search for Narrow-band and Broad-band Low Frequency Radio Transmissions from 1I/2017 U1 'Oumuamua
2018 TINGAY S., KAPLAN D., LENC E., CROFT S., MCKINLEY B. et al.
ApJ, accepted
arxiv  

Why is Interstellar Object 1I/2017 U1 (`Oumuamua) Rocky, Tumbling and Very Prolate?
2018 KATZ J.
MNRAS, 478, L95
paper  arxiv  

Spinup and Disruption of Interstellar Asteroids by Mechanical Torques, and Implications for 1I/2017 U1 (`Oumuamua)
2018 HOANG Th., LOEB A., LAZARIAN A. & CHO J.
ApJ, 860, 42
paper  arxiv  

Implications of Captured Interstellar Objects for Panspermia and Extraterrestrial Life
2018 LINGAM M. & LOEB A.
Astron. J., 156, 193
paper  arxiv  

1I/2017 'Oumuamua-like Interstellar Asteroids as Possible Messengers from the Dead Stars
2018 RAFIKOV R.
ApJ
arxiv  

Interstellar Interlopers: Number Density and Origins of 'Oumuamua-like Objects
2018 DO A., TUCKER M. & TONRY J.
ApJ. Letters, submitted
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On the Consequences of the Detection of an Interstellar Asteroid
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