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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:45  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
wb_twilight Civil TwilightWhat's Visible Now?
Dwarf Planets and Asteroids » 

Asteroid 13 Egeria

Altitude: 11.6°   Azimuth: 164.7°   Direction: South-South-East

Asteroid 13 Egeria is a relatively large asteroid with a diameter of approximately 214 kilometers. It was discovered on November 2, 1850, by Italian astronomer Annibale de Gasparis and named after the Roman goddess Egeria, who was associated with wisdom and prophecy. The asteroid orbits the Sun between Mars and Jupiter, with a semi-major axis of approximately 2.66 astronomical units (AU) and an orbital period of about 4.45 years. Egeria's orbit is moderately eccentric and inclined compared to other asteroids in the main belt. It rotates relatively slowly, with a rotation period of about 14.1 hours. Egeria is also classified as a C-type asteroid, indicating that its surface is likely rich in carbonaceous materials. It is relatively bright and can be observed with a small telescope under favorable conditions.

Asteroid 13 Egeria is currently in the constellation of Pisces Austrinus.

The current Right Ascension of Asteroid 13 Egeria is 22h 11m 22s and the Declination is -25° 34’ 38” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current magnitude of Asteroid 13 Egeria is 12.40 (JPL).

22h 11m 22s
-25° 34’ 38”
Pisces Austrinus

Today's rise, transit and set times of Asteroid 13 Egeria from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

Azimuth: 115.6°
Max altitude: 13.0°
Azimuth: 244.5°
  • 13 Egeria is above the horizon from Greenwich, United Kingdom edit_location_alt.
  • Right now it is placed in the South-South-East direction at an altitude of 12° above the horizon.
  • Given its current magnitude, 13 Egeria is visible with the help of a telescope having an aperture of 4 inches (100mm) or more.
  • 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.

Available Resources

Asteroid 13 Egeria Position and Finder Charts

Below we provide Asteroid 13 Egeria finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Finder chart of 13 Egeria in Pisces Austrinus on December,04 2023
Map showing Asteroid 13 Egeria in Pisces Austrinus on December, 04 2023
Field of view: 50x30 degrees
View fullscreen
Finder chart of 13 Egeria
Map showing Asteroid 13 Egeria in Pisces Austrinus on December, 04 2023
Field of view: 10x6 degrees
View fullscreen

Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 13 Egeria is right now. Click on the image to see a more detailed fullscreen tracker view.

13 Egeria
RA: 22h 11m 22s
Dec: -25° 34’ 38”
Deep sky finder chart for Asteroid 13 Egeria
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 13 Egeria?, a page that provides all the information needed to find Asteroid 13 Egeria in the sky and additional links to sky charts.

Asteroid 13 Egeria Distance from Earth

The distance of Asteroid 13 Egeria from Earth is currently 423,119,155 kilometers, equivalent to 2.828377 Astronomical Units. Light takes 23 minutes and 31.3736 seconds to travel from Asteroid 13 Egeria and arrive to us.

23 minutes and 31.3736 seconds

The following chart shows the distance of Asteroid 13 Egeria 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 13 Egeria 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 13 Egeria from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Asteroid 13 Egeria to Earth

Between 1 January 1900 and 31 December 2099, the closest approach of Asteroid 13 Egeria to Earth happens on Fri Jan 14 1955 at a distance of 1.428381 Astronomical Units, or 213,682,816 kilometers:

Fri Jan 14 1955

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

Asteroid 13 Egeria Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 13 Egeria, 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 13 Egeria as a function of time

Asteroid 13 Egeria Orbital Elements

The following table lists the orbital elements of Asteroid 13 Egeria at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.08561105
Orbit inclination i 16.53667695°
Perihelion distance q 2.35507774 AU
352,314,615 km
Aphelion distance Q 2.79607316 AU
418,286,592 km
Semi-major axis a 2.57557545 AU
385,300,604 km
Orbital period period 4.1335 years
1,509.7667 days
Date of perihelion transit Tp 2021-Apr-17 06:45:44
2,459,321.7818 JD
Next perihelion transit 2025-Jun-05 01:09
2,460,831.5485 JD
Argument of perihelion peri 79.906107517124°
Longitude of the ascending node node 43.208385237831°
Mean anomaly M 161.8386226222°
Mean motion n 0.23844744°/day

Visualization of Asteroid 13 Egeria Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 13 Egeria with respect of the Sun and the orbits of the major planets. The position of Asteroid 13 Egeria 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!

Orbit Diagram of Asteroid 13 Egeria
View Asteroid 13 Egeria in the 3D Solar System Simulator

Asteroid 13 Egeria Physical Data

The following shows the known values of the most important physical parameters of Asteroid 13 Egeria. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 207.64 km 0.0163
Sideral Rotation 7.0450 hours 0.2943
Absolute Magnitude 6.74
Geometric Albedo 0.0825

Asteroid 13 Egeria 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 13 Egeria computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 13 Egeria in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2023 Nov 27 22h 03m 44s -27° 02’ 21” 12.34 Pisces Austrinus
2023 Nov 28 22h 04m 41s -26° 51’ 02” 12.35 Pisces Austrinus
2023 Nov 29 22h 05m 39s -26° 39’ 39” 12.36 Pisces Austrinus
2023 Nov 30 22h 06m 38s -26° 28’ 15” 12.37 Pisces Austrinus
2023 Dec 01 22h 07m 37s -26° 16’ 50” 12.37 Pisces Austrinus
2023 Dec 02 22h 08m 38s -26° 05’ 22” 12.38 Pisces Austrinus
2023 Dec 03 22h 09m 38s -25° 53’ 53” 12.39 Pisces Austrinus
2023 Dec 04 22h 10m 40s -25° 42’ 21” 12.39 Pisces Austrinus
2023 Dec 05 22h 11m 43s -25° 30’ 48” 12.40 Pisces Austrinus
2023 Dec 06 22h 12m 46s -25° 19’ 14” 12.41 Pisces Austrinus
2023 Dec 07 22h 13m 50s -25° 07’ 37” 12.41 Pisces Austrinus
2023 Dec 08 22h 14m 53s -24° 55’ 59” 12.42 Pisces Austrinus
2023 Dec 09 22h 15m 59s -24° 44’ 18” 12.43 Aquarius
2023 Dec 10 22h 17m 04s -24° 32’ 36” 12.43 Aquarius