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Ephemeris Calculator

Compute Asteroid 1I/2017 U1 (Oumuamua) ephemerides for any date and time between 01 Jan 2013 and 31 Dec 2100 and display the predicted position in an interactive sky map.

Time: : UTC
Dwarf Planets and Asteroids » 

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 Andromeda on April, 21 2019
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]
00h 15m 55s
+22° 02’ 01”
33.06

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: 68.0°
Max altitude: 60.5°
Azimuth: 292.0°

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
2019 Apr 14 00h 13m 51s +21° 42’ 19” 32.99 Pegasus
2019 Apr 15 00h 14m 08s +21° 44’ 48” 33.00 Pegasus
2019 Apr 16 00h 14m 25s +21° 47’ 20” 33.01 Pegasus
2019 Apr 17 00h 14m 40s +21° 49’ 50” 33.02 Pegasus
2019 Apr 18 00h 14m 57s +21° 52’ 22” 33.02 Pegasus
2019 Apr 19 00h 15m 11s +21° 54’ 53” 33.03 Andromeda
2019 Apr 20 00h 15m 28s +21° 57’ 25” 33.04 Andromeda
2019 Apr 21 00h 15m 42s +21° 59’ 58” 33.05 Andromeda
2019 Apr 22 00h 15m 57s +22° 02’ 31” 33.06 Andromeda
2019 Apr 23 00h 16m 13s +22° 05’ 06” 33.07 Andromeda
2019 Apr 24 00h 16m 27s +22° 07’ 39” 33.08 Andromeda
2019 Apr 25 00h 16m 42s +22° 10’ 13” 33.08 Andromeda
2019 Apr 26 00h 16m 58s +22° 12’ 47” 33.09 Andromeda
2019 Apr 27 00h 17m 12s +22° 15’ 21” 33.10 Andromeda

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 2100

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 2100

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 2100-Dec-31, with a sampling interval of 1 day.