Planet 1I/2017 U1

Name 1I/2017 U1
Planet Status Controversial
Discovered in 2017
Mass
Mass*sin(i)
Semi-Major Axis
Orbital Period
Eccentricity 1.196 (± 0.004)
ω 241.5 (± 0.3) deg
Tperi 2.45806e+06 JD
Radius 2e-06 RJ
Inclination
Update 2018-02-22
Detection Method Imaging
Mass Detection Method
Radius Detection Method Theoretical
Molecules
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/'Oumuamua

Star

Sun
Name Sun
Distance
Spectral type
Apparent magnitude V
Mass 1 MSun
Age
Effective temperature
Radius 1 RSun
Metallicity [Fe/H]
Detected Disc
Magnetic Field
RA2000 00:00:00.0
Dec2000 +00:00:00
Alternate Names
Planetary system 1 planet

More data

Observability Predictor

Remarks

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

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  

APO Time Resolved Color Photometry of Highly-Elongated Interstellar Object 1I/'Oumuamua
2018 BOLIN B., WEAVER H., FERNANDEZ Y., LISSE C., HUPPENKOTHEN D. et al.
ApJ. Letters, 852, L2
paper  arxiv  

Investigating the dynamical history of the interstellar object 'Oumuamua
2018 DYBCZYNSKI P. & KROLIKOWSKA M.
Astron. & Astrophys., 610, L11
paper  arxiv  

Ejection of rocky and icy material from binary star systems: Implications for the origin and composition of 1I/`Oumuamua
2018 JACKSON A., TAMAYO D., HAMMOND N., ALI-DIB M. & REIN H.
MNRAS, 477, L85
paper  arxiv  

Implications of the interstellar object 1I/'Oumuamua for planetary dynamics and planetesimal formation
2018 RAYMOND S., ARMITAGE Ph., VERAS D., QUINTANA E. & BARCLAY Th.
MNRAS, in press
paper  arxiv  

A general method for assessing the origin of interstellar small bodies: the case of 1I/2017 U1 (Oumuamua)
2018 ZULUAGA J., SANCHEZ-HERNANDEZ O., SUCERQUIA M. & FERRIN I.
Astron. J., 155, 236
paper  arxiv  

Planet seeding and lithopanspermia through gas-assisted capture of interstellar objects
2018 GRISHIN E., PERETS H. & AVNI Y.
arxiv  

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  

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  

Prospects for Backtracing 1I/`Oumuamua and Future Interstellar Objects
2018 ZHANG Q.
ApJ. Letters, 852, L13
paper  arxiv  

Breakthrough Listen Observations of Breakthrough Listen with the GBT
2018 ENRIQUEZ J., SIEMION A., LAZIO T., LEBOSKY M., MACMAHON D. et al.
Res. Notes AAS, 2, 9
paper  arxiv  

Interstellar Interlopers: Number Density and Origins of 'Oumuamua-like Objects
2018 DO A., TUCKER M. & TONRY J.
ApJ. Letters, submitted
arxiv  

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

Implications of Captured Interstellar Objects for Panspermia and Extraterrestrial Life
2018 LINGAM M. & LOEB A.
ApJ, submitted
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, submitted
arxiv  

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

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  

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

A brief visit from a red and extremely elongated interstellar asteroid
2017 MEECH K., WERYK R., MICHELI M., KLEYNA J., HAINAUT O. et al.
Nature, in press
paper  

1I/2017 U1 (Oumuamua) Might Be A Cometary Nucleus
2017 FERRIN I. & ZULUAGA J.
arxiv  

`Oumuamua as a messenger from the Local Association
2017 FENG F. & JONES H.
ApJ. Letters, 852, L27
paper  arxiv  

An Observational Upper Limit on the Interstellar Number Density of Asteroids and Comets
2017 ENGELHARDT T., JEDICKE R., VERES P., FITZSIMMONS A., DENNEAU L. et al.
Astron. J., 153, 133
paper  arxiv   ADS

1I/'Oumuamua is tumbling
2017 FRASER W., PRAVEC P., FITZSIMMONS A., LACERDA P., BANNISTER M. et al.
arxiv  

Tumbling motion of 1I/'Oumuamua reveals body's violent past
2017 DRAHUS M., GUZIK P., WANIAK W., HANDZLIK B., KUROWSKI S. & XU S.
Nature Astronomy, submitted
arxiv  

Kinematics of the Interstellar Vagabond A/2017 U1
2017 MAMAJEK E.
Res. Notes AAS, 1, 21
paper  arxiv  

On Distinguishing Interstellar Objects Like 'Oumuamua From Products of Solar System Scattering
2017 WRIGHT J.
Res. Notes AAS, 1, 38
paper  

Explaining the elongated shape of 'Oumuamua by the Eikonal abrasion model
2017 DOMOKOS G., SIPOSA., SZABO G. & VARKONYI P.
Res. Notes AAS, 1, 50
paper  arxiv  

Spectroscopy and thermal modelling of the first interstellar object 1I/2017 U1 'Oumuamua
2017 FITZSIMMONS A., SNODGRASS C., ROZITIS B., YANG B., HYLAND M. et al.
Nature, accepted
arxiv  

On Distinguishing Interstellar Objects Like `Oumuamua From Products of Solar System Scattering
2017 WRIGHT J.
arxiv  

What and Whence 1I/`Oumuamua?
2017 GAIDOS E.
MNRAS, submitted
arxiv  

Ejection of material --"Jurads" -- from post main sequence planetary systems
2017 HANSEN B. & ZUCKERMAN B.
Res. Notes AAS, accepted
arxiv  

1I/`Oumuamua as a Tidal Disruption Fragment From a Binary Star System
2017 CUK M.
ApJ Lett, submitted
arxiv  

Pole, Pericenter, and Nodes of the Interstellar Minor Body A/2017 U1
2017 de la FUENTE MARCOS C. & de la FUENTE MARCOS R.
Res. Notes AAS, 1, 5
paper   arxiv  

On the Consequences of the Detection of an Interstellar Asteroid
2017 LAUGHLIN G. & BATYGIN K.
Res. Notes AAS, 1, 43
paper  arxiv  draft

Palomar Optical Spectrum of Hyperbolic Near-Earth Object A/2017 U1
2017 MASIERO J.
arxiv  

The rotation period and shape of the hyperbolic asteroid A/2017 U1 from its lightcurve
2017 KNIGHT M., PROTOPAPA S., KELLEY M., FARNHAM T., BUAER J. et al.
ApJ. Letters, 851, L31
paper  arxiv  

Implications for planetary system formation from interstellar object A/2017 U1
2017 TRILLING D., ROBINSON T., ROEGGE A., CHANDLER C., SMITH N. et al.
ApJ. Letters, 850, L38
paper  arxiv  

Origin of Interstellar Object A/2017 U1 in a Nearby Young Stellar Association?
2017 GAIDOS E., WILLIAMS J. & KRAUS A.
Res. Notes AAS, 1, 13
paper  arxiv  

New Designation Scheme for Interstellar Objects
2017 WILLIAMS G.
Minor Pl. Electr. Circ., 2017-V17
MPEC  

1I/'Oumuamua is Hot: Imaging, Spectroscopy and Search of Meteor Activity
2017 YE Q.-Zh., ZHANG Q., KELLEY M. & BROWN P.
ApJ. Letters, 851, L5
paper  arxiv  

Which way home? Finding the origin of our Solar System's first interstellar visitor
2017 MEECH K.
HST Proposal

Project Lyra: Sending a Spacecraft to 1I/'Oumuamua (former A/2017 U1), the Interstellar Asteroid
2017 HEIN A., PERAKIS N., LONG K., CROWL A., EUBANKS M. et al.
Acta Astronautica, to be submitted
arxiv  

The origin of interstellar asteroidal objects like 1I/2017 U1
2017 PORTEGIES ZWART S., PELUPESSY I., BEDORF J., CAI M. & TORRES S.
MNRAS, submitted
arxiv  

Could 1I/'Oumuamua be macroscopic dark matter?
2017 CYNCYNATES D., DIMASTROGIOVANNI E., KUMAR S., SIDHU J. & STARKMAN G.
arxiv  

Is 1I/2017 U1 really of interstellar origin ?
2017 SCHNEIDER J.
Res. Notes AAS, 1, 18
paper  arxiv  

Interstellar Interloper 1I/2017 U1: Observations from the NOT and WIYN Telescopes
2017 JEWITT D., LUU J., RAJAGOPAL J., KOTULLA R., RIDGWAY S. et al.
ApJ. Letters, 850, L36
paper  arxiv  

Col-OSSOS: Colors of the Interstellar Planetesimal 1I/2017 U1 in Context with the Solar System
2017 BANNISTER M., SCHWAMB M., FRASER W., MARSSET M., FITZSIMMONS A. et al.
ApJ. Letters, 851, L38
paper  arxiv  

Realistic Detectability of Close Interstellar Comets
2016 COOK N., RAGOZZINE D., GRANVIK M. & STEPHENS D.
ApJ, 825, 51
paper  

Will the Large Synoptic Survey Telescope Detect Extra-Solar Planetesimals Entering the Solar System?
2009 MORO-MARTIN A., TURNER E. & LOEB A.
ApJ, 704, 733
paper  

On the number density of interstellar comets as a constraint on the formation rate of planetary systems
1990 STERN S.
PASP, 102, 793
paper  

A Probability of Encounter With Interstellar Comets and the Likelihood of Their Existence
1976 ZEKANINA Z.
Icarus, 27, 123
paper