We use cookies to deliver essential features and to measure their performance. Learn more.
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:15 
Transit: 12:47 
Sunset: 18:17
sunny   (Daytime)  
What's Visible Now • Tonight Timeline
Search  close
Dwarf Planets and Asteroids » 

Asteroid 15 Eunomia

Below the horizon.  Rise: 19:19 | Tran: 5:36 | Set: 15:50
Alt: -1.32°   Az: 344.65°   Direction: North-North-West

Asteroid 15 Eunomia is in the constellation of Auriga, at a distance of 248,500,972.0 kilometers from Earth. The current Right Ascension is 05h 49m 58s and the Declination is +35° 37’ 12” (apparent coordinates). The magnitude of Asteroid 15 Eunomia is 9.25 (data provided by JPL Horizons).

Finder chart of 15 Eunomia in Auriga on October,09 2024
Map showing Asteroid 15 Eunomia in Auriga on October, 09 2024. Field of view: 50x30 degrees
View interactive star map

Asteroid 15 Eunomia is one of the largest asteroids in the main asteroid belt, with a diameter of about 270 kilometers. It was discovered on July 29, 1851, by the Italian astronomer Annibale de Gasparis. The asteroid was named after Eunomia, the Greek goddess of law and order. Eunomia orbits the Sun at a distance of about 2.64 astronomical units (AU), with an orbital period of about 4.38 years. Eunomia is classified as an S-type asteroid, indicating that its surface is likely composed of silicate materials. Astronomers have observed that Eunomia has a small moon, which has a diameter of about 4 kilometers and orbits at a distance of approximately 110 kilometers from the asteroid's center.

Celestial Coordinates

Apparent

05h 49m 58s
+35° 37’ 12”
10h 44m 00s
16h 33m 59s

J2000

05h 48m 18s
+35° 36’ 49”

Additional Information

Auriga
9.25

Rise and Set Times

Today's rise, transit and set times of Asteroid 15 Eunomia from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 54.4°
Max altitude: 74.1°
Azimuth: 305.6°
  • 15 Eunomia is below the horizon from Greenwich, UK.
  • Given its current magnitude, 15 Eunomia is visible with the help of a binocular with a 50mm aperture, easy with a small telescope.
  • 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.

Finder Charts

Finder chart of 15 Eunomia
Sky map showing Asteroid 15 Eunomia in Auriga on October, 09 2024. Field of view: 10x6 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 15 Eunomia is right now. Click on the image to see a more detailed fullscreen tracker view.

15 Eunomia
RA: 05h 48m 18s
Dec: +35° 36’ 49”
Deep sky finder chart for Asteroid 15 Eunomia. Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Asteroid 15 Eunomia?, a page that provides all the information needed to find Asteroid 15 Eunomia in the sky and additional links to sky charts.

Distance from Earth

The distance of Asteroid 15 Eunomia from Earth is currently 248,500,972.0 kilometers, equivalent to 1.6611263973 Astronomical Units. Light takes 13m 48.910s to travel from Asteroid 15 Eunomia and arrive to us.

248,500,972.0
1.6611263973
13m 48.910s

The following chart shows the distance of Asteroid 15 Eunomia 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.

Chart of the distance of Asteroid 15 Eunomia from Earth in Astronomical Units (au)

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 15 Eunomia from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach

Between 1 January 1900 and 31 December 2099, the closest approach of Asteroid 15 Eunomia to Earth happens on Sat Oct 24 2071 at a distance of 1.190320 Astronomical Units, or 178,069,374 kilometers:

Sat Oct 24 2071
178,069,374
1.190320

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 15 Eunomia, 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.

Chart of the magnitude of Asteroid 15 Eunomia as a function of time

Orbital Elements

The following table lists the orbital elements of Asteroid 15 Eunomia at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.18700976
Orbit inclination i 11.75360648°
Perihelion distance q 2.14877925 AU
321,452,801 km
Aphelion distance Q 3.13733404 AU
469,338,492 km
Semi-major axis a 2.64305664 AU
395,395,647 km
Orbital period period 4.2970 years
1,569.4885 days
Date of perihelion transit Tp 2024-Jul-14 02:11:40
2,460,505.5914 JD
Next perihelion transit 2028-Oct-30 13:55
2,462,075.0799 JD
Argument of perihelion peri 98.713244720149°
Longitude of the ascending node node 292.90826165525°
Mean anomaly M 244.14510652076°
Mean motion n 0.22937410°/day

Orbit Visualization

Orbit Diagram of Asteroid 15 Eunomia
View Asteroid 15 Eunomia in the 3D Solar System Simulator

Physical Data

The following shows the known values of the most important physical parameters of Asteroid 15 Eunomia. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 255.33 km 0.0200
Sideral Rotation 6.0830 hours 0.2542
Absolute Magnitude 5.28
Geometric Albedo 0.2094

15 Days Ephemeris

The following table lists the ephemerides of Asteroid 15 Eunomia 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
2024 Oct 02 05h 42m 51s +35° 24’ 03” 9.36 Auriga
2024 Oct 03 05h 43m 53s +35° 25’ 56” 9.35 Auriga
2024 Oct 04 05h 44m 53s +35° 27’ 47” 9.33 Auriga
2024 Oct 05 05h 45m 51s +35° 29’ 34” 9.32 Auriga
2024 Oct 06 05h 46m 48s +35° 31’ 19” 9.30 Auriga
2024 Oct 07 05h 47m 43s +35° 33’ 00” 9.29 Auriga
2024 Oct 08 05h 48m 35s +35° 34’ 38” 9.27 Auriga
2024 Oct 09 05h 49m 26s +35° 36’ 13” 9.26 Auriga
2024 Oct 10 05h 50m 15s +35° 37’ 45” 9.24 Auriga
2024 Oct 11 05h 51m 02s +35° 39’ 14” 9.22 Auriga
2024 Oct 12 05h 51m 46s +35° 40’ 41” 9.21 Auriga
2024 Oct 13 05h 52m 29s +35° 42’ 04” 9.19 Auriga
2024 Oct 14 05h 53m 10s +35° 43’ 24” 9.18 Auriga
2024 Oct 15 05h 53m 49s +35° 44’ 41” 9.16 Auriga

Additional Resources