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Asteroid 1I/2017 U1 (Oumuamua)

Available Resources

Asteroid 1I/2017 U1 (Oumuamua) Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 1I/2017 U1 (Oumuamua) is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 1I/2017 U1 (Oumuamua) in Pegasus on December, 11 2018
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
23h 45m 58s
+20° 23’ 25”

Asteroid 1I/2017 U1 (Oumuamua) Rise and Set Times

Today's Asteroid 1I/2017 U1 (Oumuamua) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 69.6°
Max altitude: 58.9°
Azimuth: 290.4°

Asteroid 1I/2017 U1 (Oumuamua) Orbit Diagram

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 1I/2017 U1 (Oumuamua) with respect of the Sun and the orbits of the major planets. The position of Asteroid 1I/2017 U1 (Oumuamua) and the planets along their orbits in this diagram accurately represents the current configuration of the objects in the Solar System. This is an experimental feature and it requires a WebGL enabled browser. Please provide us feedback!

Orbit Diagram of Asteroid 1I/2017 U1 (Oumuamua)
View Asteroid 1I/2017 U1 (Oumuamua) in the 3D Solar System Simulator

Asteroid 1I/2017 U1 (Oumuamua) Ephemeris

The following table lists the ephemerides of Asteroid 1I/2017 U1 (Oumuamua) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 1I/2017 U1 (Oumuamua) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2018 Dec 04 23h 46m 31s +20° 43’ 05” 31.99 Pegasus
2018 Dec 05 23h 46m 24s +20° 40’ 23” 32.00 Pegasus
2018 Dec 06 23h 46m 19s +20° 37’ 45” 32.01 Pegasus
2018 Dec 07 23h 46m 14s +20° 35’ 08” 32.03 Pegasus
2018 Dec 08 23h 46m 09s +20° 32’ 36” 32.04 Pegasus
2018 Dec 09 23h 46m 06s +20° 30’ 06” 32.05 Pegasus
2018 Dec 10 23h 46m 02s +20° 27’ 41” 32.07 Pegasus
2018 Dec 11 23h 46m 00s +20° 25’ 18” 32.08 Pegasus
2018 Dec 12 23h 45m 57s +20° 22’ 59” 32.09 Pegasus
2018 Dec 13 23h 45m 56s +20° 20’ 43” 32.11 Pegasus
2018 Dec 14 23h 45m 55s +20° 18’ 29” 32.12 Pegasus
2018 Dec 15 23h 45m 54s +20° 16’ 21” 32.13 Pegasus
2018 Dec 16 23h 45m 52s +20° 14’ 15” 32.14 Pegasus
2018 Dec 17 23h 45m 52s +20° 12’ 12” 32.16 Pegasus

Distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth

The following chart shows the distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 1I/2017 U1 (Oumuamua) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth between January 2013 and December 2075

Light Curve of Asteroid 1I/2017 U1 (Oumuamua)

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 1I/2017 U1 (Oumuamua), according to the most recent ephemerides data. Magnitude data is sampled with a 2 days interval and there might be inaccuracies for objects changing brightness very rapidly during the course of a few days. For comets there could be large discrepancies between the observed and predicted brightness because of their highly dynamic behaviour.

Predicted magnitude of Asteroid 1I/2017 U1 (Oumuamua) between January 2013 and December 2075

Asteroid 1I/2017 U1 (Oumuamua) Orbital Elements

The following table lists the orbital elements of Asteroid 1I/2017 U1 (Oumuamua) at epoch 22 November 2017 00:00 UTC (JD: 2458080.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 1.20113380
Orbit inclination i 122.74170628°
Perihelion distance q 0.25591158 AU
38,283,828 km
Aphelion distance Q n.a.
Semi-major axis a n.a.
Orbital period period n.a.
Date of perihelion transit Tp 2017-Sep-09 12:10:32
2,458,006.0073 JD
Argument of perihelion peri 241.81053603049°
Longitude of the ascending node node 24.596909555232°
Mean anomaly M 51.157619793825°
Mean motion n 0.68674695°/day
Closest approach to Earth* 2017-Oct-15
Distance of closest approach* 0.16199099 AU
24,233,507 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.