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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:45 
Transit: 13:02 
Sunset: 21:19
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Dwarf Planets and Asteroids » 

Asteroid 90377 Sedna

Below the horizon.  Rise: 4:12 | Tran: 10:55 | Set: 17:38
Alt: -28.77°   Az: 13.03°   Direction: South

Asteroid 90377 Sedna is in the constellation of Taurus, at a distance of 12,566,819,807.0 kilometers from Earth. The current Right Ascension is 04h 06m 42s and the Declination is +08° 56’ 03” (apparent coordinates). The magnitude of asteroid 90377 Sedna is 20.83.

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.

Star map showing the position of asteroid 90377 Sedna in the constellation of Taurus on F, d Y. Field of view: 50x30 degrees. View interactive star map.
Star map showing the position of asteroid 90377 Sedna in the constellation of Taurus on F, d Y. Field of view: 15x9 degrees. View in interactive star map.

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.

90377 Sedna
RA: 04h 05m 19s
Dec: +08° 51’ 59”
Simplified high-resolution deep sky chart showing the current position of asteroid 90377 Sedna. Field of view: 60 x 40 arcminutes. Go to the dedicated page

Equatorial Coordinates

Apparent

04h 06m 42s
+08° 56’ 03”
12h 46m 10s
16h 52m 53s

J2000

04h 05m 19s
+08° 51’ 59”

Additional Information

Taurus
20.83

Rise and Set Times

The following table lists today's rise, transit and set times of asteroid 90377 Sedna from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 81.1°
Max altitude: 47.5°
Azimuth: 278.9°

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 12,566,819,807.0 kilometers, equivalent to 84.0040018497 Astronomical Units. Light takes 11h 38m 38.399s to travel from asteroid 90377 Sedna and arrive to us.

12,566,819,807.0
84.0040018497
11h 38m 38.399s

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.

Chart of the distance of asteroid 90377 Sedna from Earth in Astronomical Units (au)
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:

Tuesday 29 December 2076
11,252,347,695
75.217298

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.

Chart of the magnitude of asteroid 90377 Sedna as a function of time

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 17 2025 04h 06m 20s +08° 55’ 27” 20.82 Taurus
Jun 18 2025 04h 06m 23s +08° 55’ 33” 20.82 Taurus
Jun 19 2025 04h 06m 26s +08° 55’ 38” 20.82 Taurus
Jun 20 2025 04h 06m 29s +08° 55’ 42” 20.82 Taurus
Jun 21 2025 04h 06m 32s +08° 55’ 46” 20.82 Taurus
Jun 22 2025 04h 06m 35s +08° 55’ 51” 20.82 Taurus
Jun 23 2025 04h 06m 38s +08° 55’ 55” 20.83 Taurus
Jun 24 2025 04h 06m 40s +08° 55’ 59” 20.83 Taurus
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

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