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Dwarf Planets and Asteroids » 

Asteroid 13 Egeria

Below the horizon.  Rise: 8:04 | Tran: 18:23 | Set: 4:44
Alt: -2.47°   Az: 4.73°   Direction: North

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 in the constellation of Perseus, at a distance of 301,099,059.0 kilometers from Earth. The current Right Ascension is 04h 06m 52s and the Declination is +35° 53’ 50” (apparent coordinates). The magnitude of Asteroid 13 Egeria is 11.48 (data provided by JPL Horizons).

Finder Charts

Map showing Asteroid 13 Egeria in Perseus on February, 15 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid 13 Egeria in Perseus on February, 15 2025. Field of view: 15x9 degrees. View in interactive sky chart

High 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: 04h 05m 14s
Dec: +35° 49’ 50”
Deep sky finder chart for Asteroid 13 Egeria. Field of view: 60x40 arcmins. View in deep sky object tracker

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.

Celestial Coordinates

Apparent

04h 06m 52s
+35° 53’ 50”
12h 23m 20s
16h 30m 13s

J2000

04h 05m 14s
+35° 49’ 50”

Additional Information

Perseus
11.48

Rise and Set Times

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

Azimuth: 54.1°
Max altitude: 74.4°
Azimuth: 305.9°
  • 13 Egeria is below the horizon from Greenwich, UK.
  • Given its current magnitude, 13 Egeria is visible with the help of a binocular with a 70-80mm aperture or 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.

Distance from Earth

The distance of Asteroid 13 Egeria from Earth is currently 301,099,059.0 kilometers, equivalent to 2.0127228923 Astronomical Units. Light takes 16m 44.358s to travel from Asteroid 13 Egeria and arrive to us.

301,099,059.0
2.0127228923
16m 44.358s

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

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
213,682,816
1.428381

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 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

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

Orbit Visualization

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

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

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. Apparent celestial coordinates are provided.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2025 Feb 08 04h 00m 40s +35° 50’ 01” 11.37 Perseus
2025 Feb 09 04h 01m 25s +35° 50’ 25” 11.39 Perseus
2025 Feb 10 04h 02m 13s +35° 50’ 51” 11.40 Perseus
2025 Feb 11 04h 03m 02s +35° 51’ 20” 11.42 Perseus
2025 Feb 12 04h 03m 53s +35° 51’ 51” 11.43 Perseus
2025 Feb 13 04h 04m 45s +35° 52’ 24” 11.45 Perseus
2025 Feb 14 04h 05m 40s +35° 53’ 01” 11.46 Perseus
2025 Feb 15 04h 06m 36s +35° 53’ 39” 11.48 Perseus
2025 Feb 16 04h 07m 34s +35° 54’ 19” 11.49 Perseus
2025 Feb 17 04h 08m 33s +35° 55’ 01” 11.51 Perseus
2025 Feb 18 04h 09m 34s +35° 55’ 45” 11.52 Perseus
2025 Feb 19 04h 10m 36s +35° 56’ 31” 11.53 Perseus
2025 Feb 20 04h 11m 41s +35° 57’ 19” 11.55 Perseus
2025 Feb 21 04h 12m 46s +35° 58’ 09” 11.56 Perseus

Additional Resources