Asteroid 90377 Sedna
Asteroid 90377 Sedna is in the constellation of Taurus, at a distance of
Finder Charts
The sky charts below show, at different resolutions, the position of asteroid 90377 Sedna in the sky. Click on each chart to access the interactive star map tool.
The following map uses photographic imagery from the Digitized Sky Survey (DSS) to realistically visualize the precise position of asteroid 90377 Sedna against the stars in the background. The horizontal size of the map measures 60 arcminutes. Click on the image to access a more detailed full-screen view.
Equatorial Coordinates
Apparent
J2000
Additional Information
Rise and Set Times
The following table lists today's rise, transit and set times of asteroid 90377 Sedna from Xinshi, China (all times relative to the local timezone Asia/Shanghai):
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 90377 Sedna from Earth is currently
The following graph shows the distance of asteroid 90377 Sedna from Earth as a function of time. In the chart the distance is measured in Astronomical Units and the data is sampled with an interval of 1 day.
Note: The values in this chart may not be entirely accurate around the time of closest approach for objects passing very close to Earth at high speed (e.g., Near-Earth Objects).
The value of the distance of 90377 Sedna from Earth is also available as a real time updated value in the live position tracker.
Closest Approach to Earth
In the period between January 1, 1900 and December 31, 2099, the closest approach of asteroid 90377 Sedna to Earth will happen on Tuesday 29 December 2076 at a distance of 75.217298 Astronomical Units, or 11,252,347,695 kilometers:
Note: the values for the closest approach are computed with a sampling interval of 1 day.
Light Curve
The following chart shows the light curve of asteroid 90377 Sedna, i.e., its apparent magnitude as a function of time. The curve is calculated using the latest ephemerides provided by JPL Horizons. The magnitude data is sampled with the interval of 2 days. Because of this sampling, inaccuracies may occur for objects that have large variations of brightness over a few days. For comets, large discrepancies can arise between the calculated brightness and the observations due to their highly dynamic, and not always precisely predictable, behavior.
Orbital Elements
The following table lists the orbital elements of asteroid 90377 Sedna at epoch February, 24 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.85650695 |
| Orbit inclination | i | 11.93034000° |
| Perihelion distance | q | 76.38227795 AU 11,426,626,164 km |
| Aphelion distance | Q |
988.23066284 AU 147,837,203,218 km |
| Semi-major axis | a |
532.30647040 AU 79,631,914,691 km |
| Orbital period | period |
12,281.4832 years 4,485,811.7555 days |
| Date of perihelion transit | Tp | May 15, 2075 2,479,072.5781 JD |
| Argument of perihelion | peri | 310.86879009292° |
| Longitude of the ascending node | node | 144.25847763982° |
| Mean anomaly | M | 358.46940787854° |
| Mean motion | n | 0.00008025°/day |
Orbit Visualization
The following chart is a 3D animated visualization of the orbit of asteroid 90377 Sedna relative to the other major objects in the Solar System. You can access more advanced features using our 3D Solar System Viewer.
15 Days Ephemeris
The following table lists the ephemerides of asteroid 90377 Sedna 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 |
|---|---|---|---|---|
| Jun 25 2025 | 04h 06m 43s | +08° 56’ 03” | 20.83 | Taurus |
| Jun 26 2025 | 04h 06m 46s | +08° 56’ 06” | 20.83 | Taurus |
| Jun 27 2025 | 04h 06m 49s | +08° 56’ 10” | 20.83 | Taurus |
| Jun 28 2025 | 04h 06m 52s | +08° 56’ 13” | 20.83 | Taurus |
| Jun 29 2025 | 04h 06m 54s | +08° 56’ 16” | 20.83 | Taurus |
| Jun 30 2025 | 04h 06m 57s | +08° 56’ 19” | 20.83 | Taurus |
| Jul 01 2025 | 04h 07m 00s | +08° 56’ 22” | 20.83 | Taurus |
| Jul 02 2025 | 04h 07m 02s | +08° 56’ 24” | 20.83 | Taurus |
| Jul 03 2025 | 04h 07m 05s | +08° 56’ 27” | 20.83 | Taurus |
| Jul 04 2025 | 04h 07m 07s | +08° 56’ 28” | 20.84 | Taurus |
| Jul 05 2025 | 04h 07m 10s | +08° 56’ 30” | 20.84 | Taurus |
| Jul 06 2025 | 04h 07m 12s | +08° 56’ 31” | 20.84 | Taurus |
| Jul 07 2025 | 04h 07m 15s | +08° 56’ 33” | 20.84 | Taurus |
| Jul 08 2025 | 04h 07m 17s | +08° 56’ 34” | 20.84 | Taurus |
Additional Resources on TheSkyLive
- Asteroid 90377 Sedna: Complete reference information on TheSkyLive.com.
- Where is asteroid 90377 Sedna?: Key information on where to find asteroid 90377 Sedna in the sky.
- Distance of asteroid 90377 Sedna from Earth: Find out how far asteroid 90377 Sedna is from Earth right now.
- How Bright is asteroid 90377 Sedna?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Rise and set times of asteroid 90377 Sedna from your location.
- Interactive Sky Map: Planetarium-style interactive visualization of asteroid 90377 Sedna's position in the sky.
- Live Position Tracker: High precision real time tracker of asteroid 90377 Sedna's position using deep space imagery.
- Ephemeris: 15 days asteroid 90377 Sedna's computed ephemeris.
- Orbital elements: Information about asteroid 90377 Sedna orbital parameters.
- Orbit Visualization: 3D interactive visualization showing the orbit of asteroid 90377 Sedna with respect to the major Solar System objects.