Asteroid 1I/2017 U1 (Oumuamua)
Asteroid 1I/2017 U1 (Oumuamua) is in the constellation of
Pegasus,
at a distance of
Finder Charts
View interactive star map
High 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.
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.
Celestial Coordinates
Apparent
J2000
Additional Information
Rise and Set Times
Today's rise, transit and set times of Asteroid 1I/2017 U1 (Oumuamua) from Greenwich, UK (all times relative to the local timezone Europe/London):
- 1I/2017 U1 (Oumuamua) is below the horizon from Greenwich, UK.
- Given its current magnitude, 1I/2017 U1 (Oumuamua) is visible only through long exposure photography.
- 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.
Distance from Earth
The distance of Asteroid 1I/2017 U1 (Oumuamua) from Earth is currently
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.
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
Between 1 January 2013 and 30 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:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Light Curve
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.
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 |
View Asteroid 1I/2017 U1 (Oumuamua) in the 3D Solar System Simulator
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. Apparent celestial coordinates are provided.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2025 May 30 | 00h 01m 18s | +24° 36’ 29” | 38.99 | Pegasus |
| 2025 May 31 | 00h 01m 20s | +24° 37’ 07” | 38.99 | Pegasus |
| 2025 Jun 01 | 00h 01m 21s | +24° 37’ 45” | 38.99 | Pegasus |
| 2025 Jun 02 | 00h 01m 23s | +24° 38’ 23” | 38.99 | Pegasus |
| 2025 Jun 03 | 00h 01m 24s | +24° 39’ 01” | 38.99 | Pegasus |
| 2025 Jun 04 | 00h 01m 26s | +24° 39’ 39” | 39.00 | Pegasus |
| 2025 Jun 05 | 00h 01m 27s | +24° 40’ 16” | 39.00 | Pegasus |
| 2025 Jun 06 | 00h 01m 28s | +24° 40’ 53” | 39.00 | Pegasus |
| 2025 Jun 07 | 00h 01m 29s | +24° 41’ 29” | 39.00 | Pegasus |
| 2025 Jun 08 | 00h 01m 30s | +24° 42’ 05” | 39.00 | Pegasus |
| 2025 Jun 09 | 00h 01m 31s | +24° 42’ 41” | 39.00 | Pegasus |
| 2025 Jun 10 | 00h 01m 32s | +24° 43’ 17” | 39.00 | Pegasus |
| 2025 Jun 11 | 00h 01m 33s | +24° 43’ 52” | 39.00 | Pegasus |
| 2025 Jun 12 | 00h 01m 33s | +24° 44’ 27” | 39.01 | Pegasus |
Additional Resources on TheSkyLive
- Asteroid 1I/2017 U1 (Oumuamua): Complete reference information on TheSkyLive.com.
- Where is Asteroid 1I/2017 U1 (Oumuamua)?: Key information on locating Asteroid 1I/2017 U1 (Oumuamua) in the sky.
- Distance from Earth: Find out how far Asteroid 1I/2017 U1 (Oumuamua) is from Earth right now.
- How Bright is Asteroid 1I/2017 U1 (Oumuamua)?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Asteroid 1I/2017 U1 (Oumuamua)'s rise and set times from your location.
- Interactive Sky Map: planetarium-style interactive visualization of Asteroid 1I/2017 U1 (Oumuamua)'s position in the sky.
- Live Position Tracker: high precision position tracker with deep space imagery.
- Ephemeris: 15 days Asteroid 1I/2017 U1 (Oumuamua)'s computed ephemeris.
- Orbital elements: information about Asteroid 1I/2017 U1 (Oumuamua) orbital parameters.
- Orbit Visualization. 3d interactive visualization showing the orbit of Asteroid 1I/2017 U1 (Oumuamua) with respect to the major Solar System objects.