Asteroid 15 Eunomia

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.

Asteroid 15 Eunomia is currently in the constellation of Sagittarius. The current Right Ascension of Asteroid 15 Eunomia is 19h 33m 05s and the Declination is -26° 01’ 37” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current magnitude of Asteroid 15 Eunomia is 9.56 (JPL).

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

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.

Available Resources

• Position and finder charts (see also Where is Asteroid 15 Eunomia?)
• Distance from Earth (see also How far is Asteroid 15 Eunomia from Earth?)
• When does Asteroid 15 Eunomia rise and set?
• Brightness (see also How bright is Asteroid 15 Eunomia?)
• Orbital elements. Detailed information about Asteroid 15 Eunomia orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Asteroid 15 Eunomia with respect to the major Solar System objects.
• Physical data. Detailed information about physical properties of Asteroid 15 Eunomia, such as mass and geometric properties.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Asteroid 15 Eunomia for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Asteroid 15 Eunomia in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Asteroid 15 Eunomia with your telescope or on your astrophotographies.

Higher 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.

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.

Asteroid 15 Eunomia Distance from Earth

The distance of Asteroid 15 Eunomia from Earth is currently 276,777,653 kilometers, equivalent to 1.850144 Astronomical Units. Light takes 15 minutes and 23.2309 seconds to travel from Asteroid 15 Eunomia and arrive to us.

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.

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 of Asteroid 15 Eunomia to Earth

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:

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

Asteroid 15 Eunomia Brightness and 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.

Visualization of Asteroid 15 Eunomia Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 15 Eunomia with respect of the Sun and the orbits of the major planets. The position of Asteroid 15 Eunomia 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!

Asteroid 15 Eunomia 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. Click on each row of the table to locate Asteroid 15 Eunomia in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2023 Jun 01	19h 36m 41s	-26° 11’ 22”	9.74	Sagittarius
2023 Jun 02	19h 36m 18s	-26° 10’ 04”	9.71	Sagittarius
2023 Jun 03	19h 35m 53s	-26° 08’ 44”	9.69	Sagittarius
2023 Jun 04	19h 35m 26s	-26° 07’ 26”	9.67	Sagittarius
2023 Jun 05	19h 34m 56s	-26° 06’ 07”	9.64	Sagittarius
2023 Jun 06	19h 34m 27s	-26° 04’ 49”	9.62	Sagittarius
2023 Jun 07	19h 33m 55s	-26° 03’ 29”	9.60	Sagittarius
2023 Jun 08	19h 33m 21s	-26° 02’ 11”	9.57	Sagittarius
2023 Jun 09	19h 32m 45s	-26° 00’ 51”	9.55	Sagittarius
2023 Jun 10	19h 32m 09s	-25° 59’ 30”	9.53	Sagittarius
2023 Jun 11	19h 31m 31s	-25° 58’ 09”	9.50	Sagittarius
2023 Jun 12	19h 30m 51s	-25° 56’ 47”	9.48	Sagittarius
2023 Jun 13	19h 30m 10s	-25° 55’ 23”	9.45	Sagittarius
2023 Jun 14	19h 29m 26s	-25° 53’ 59”	9.43	Sagittarius