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🌎  Greenwich, United Kingdom [change]

Asteroid 1I/2017 U1 (Oumuamua)

Asteroid 1I/2017 U1 (Oumuamua) is currently in the constellation of Pegasus. The current Right Ascension of Asteroid 1I/2017 U1 (Oumuamua) is 23h 56m 09s and the Declination is +24° 39’ 29” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 1I/2017 U1 (Oumuamua) is 37.15 (JPL).

Summary of key facts about Asteroid 1I/2017 U1 (Oumuamua) [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

23h 56m 09s
+24° 39’ 29”
  • 1I/2017 U1 (Oumuamua) is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the East-South-East direction at an altitude of 45° above the horizon.
  • Given its current magnitude, 1I/2017 U1 (Oumuamua) is visible only through long exposure photography.
  • See also 1I/2017 U1 (Oumuamua) rise and set times.
  • Go to interactive sky chart

If you need to access this information frequently for your observations, you can create a simple customized Quick Access page, so that you can easily bookmark it in your browser favorites or add a shortcut to your mobile phones' home screen.

Additional information about Asteroid 1I/2017 U1 (Oumuamua) available on TheSkyLive:

Available Resources

Asteroid 1I/2017 U1 (Oumuamua) Position and Finder Charts

Below we provide Asteroid 1I/2017 U1 (Oumuamua) finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Asteroid 1I/2017 U1 (Oumuamua) in Pegasus on September, 30 2022
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid 1I/2017 U1 (Oumuamua) in Pegasus on September, 30 2022
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 1I/2017 U1 (Oumuamua) is right now. Click on the image to see a more detailed fullscreen tracker view.

1I/2017 U1 (Oumuamua)
RA: 23h 56m 09s
Dec: +24° 39’ 29”
Deep sky finder chart for Asteroid 1I/2017 U1 (Oumuamua)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 1I/2017 U1 (Oumuamua)?, a page that provides all the information needed to find Asteroid 1I/2017 U1 (Oumuamua) in the sky and additional links to sky charts.

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

The distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth is currently 4,608,279,394 kilometers, equivalent to 30.804445 Astronomical Units. Light takes 4 hours, 16 minutes and 11.5655 seconds to travel from Asteroid 1I/2017 U1 (Oumuamua) and arrive to us.

4 hours, 16 minutes and 11.5655 seconds

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

Distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth between January 2013 and December 2100

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

Closest approach of Asteroid 1I/2017 U1 (Oumuamua) to Earth

Between January 2013 and December 2100, the closest approach of Asteroid 1I/2017 U1 (Oumuamua) to Earth happens on Sun Oct 15 2017 at a distance of 0.161991 Astronomical Units, or 24,233,513 kilometers:

Sun Oct 15 2017

NOTE: values for the closest approach are computed with a sampling interval of 1 day.

Asteroid 1I/2017 U1 (Oumuamua) brightness

The current visual magnitude of Asteroid 1I/2017 U1 (Oumuamua) is 37.15.


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) rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 65.3°
Max altitude: 63.2°
Azimuth: 294.7°

The rise and set times are defined as the time at which the upper limb of Asteroid 1I/2017 U1 (Oumuamua) touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

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

Visualization of Asteroid 1I/2017 U1 (Oumuamua) Orbit

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) 15 Days 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
2022 Sep 23 23h 57m 11s +24° 45’ 29” 37.14 Pegasus
2022 Sep 24 23h 57m 02s +24° 44’ 45” 37.15 Pegasus
2022 Sep 25 23h 56m 54s +24° 44’ 02” 37.15 Pegasus
2022 Sep 26 23h 56m 47s +24° 43’ 18” 37.15 Pegasus
2022 Sep 27 23h 56m 39s +24° 42’ 32” 37.15 Pegasus
2022 Sep 28 23h 56m 30s +24° 41’ 45” 37.15 Pegasus
2022 Sep 29 23h 56m 22s +24° 40’ 59” 37.15 Pegasus
2022 Sep 30 23h 56m 16s +24° 40’ 10” 37.15 Pegasus
2022 Oct 01 23h 56m 08s +24° 39’ 21” 37.15 Pegasus
2022 Oct 02 23h 55m 59s +24° 38’ 32” 37.16 Pegasus
2022 Oct 03 23h 55m 51s +24° 37’ 42” 37.16 Pegasus
2022 Oct 04 23h 55m 45s +24° 36’ 52” 37.16 Pegasus
2022 Oct 05 23h 55m 36s +24° 36’ 02” 37.16 Pegasus
2022 Oct 06 23h 55m 28s +24° 35’ 09” 37.17 Pegasus