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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 5:41  
clear_day Transit: 12:56  
SunsetSet: 20:12
wb_twilight Astronomical TwilightWhat's Visible Now?
Dwarf Planets and Asteroids » 

Asteroid 13 Egeria

Altitude: -26.4°   Azimuth: 319.0°   Direction: North-West

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, at a distance of 535,639,905 kilometers from Earth.

Finder chart of 13 Egeria in Pisces on April,26 2024
Map showing Asteroid 13 Egeria in Pisces on April, 26 2024. Field of view: 50x30 degrees
View interactive star map
The current Right Ascension of Asteroid 13 Egeria is 01h 33m 56s and the Declination is +04° 10’ 05” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current magnitude of Asteroid 13 Egeria is 12.26 (JPL).

01h 33m 56s
+04° 10’ 05”
Pisces
12.26

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: 86.0°
Max altitude: 42.6°
Azimuth: 274.1°
  • 13 Egeria is below the horizon from Greenwich, United Kingdom edit_location_alt.
  • 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.

Additional Resources

Asteroid 13 Egeria Position and Finder Charts

Finder chart of 13 Egeria
Map showing Asteroid 13 Egeria in Pisces on April, 26 2024
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: 01h 33m 56s
Dec: +04° 10’ 05”
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 535,639,905 kilometers, equivalent to 3.580532 Astronomical Units. Light takes 29 minutes and 46.7024 seconds to travel from Asteroid 13 Egeria and arrive to us.

535,639,905
3.580532
29 minutes and 46.7024 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
213,682,816
1.428381

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
2024 Apr 19 01h 21m 48s +02° 37’ 31” 12.20 Cetus
2024 Apr 20 01h 23m 21s +02° 49’ 23” 12.21 Pisces
2024 Apr 21 01h 24m 54s +03° 01’ 14” 12.22 Pisces
2024 Apr 22 01h 26m 26s +03° 13’ 04” 12.22 Pisces
2024 Apr 23 01h 27m 57s +03° 24’ 51” 12.23 Pisces
2024 Apr 24 01h 29m 30s +03° 36’ 37” 12.24 Pisces
2024 Apr 25 01h 31m 04s +03° 48’ 20” 12.24 Pisces
2024 Apr 26 01h 32m 35s +04° 00’ 02” 12.25 Pisces
2024 Apr 27 01h 34m 09s +04° 11’ 42” 12.26 Pisces
2024 Apr 28 01h 35m 40s +04° 23’ 21” 12.26 Pisces
2024 Apr 29 01h 37m 14s +04° 34’ 56” 12.27 Pisces
2024 Apr 30 01h 38m 47s +04° 46’ 31” 12.28 Pisces
2024 May 01 01h 40m 19s +04° 58’ 03” 12.28 Pisces
2024 May 02 01h 41m 53s +05° 09’ 33” 12.29 Pisces