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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:12 
Transit: 12:56 
Sunset: 20:41
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Dwarf Planets and Asteroids » 

Asteroid 5 Astraea

Above the horizon.  Rise: 22:16 | Tran: 2:58 | Set: 7:36
Alt: 14.78°   Az: 219.60°   Direction: South-West

Asteroid 5 Astraea is in the constellation of Serpens, at a distance of 257,754,425.0 kilometers from Earth. The current Right Ascension is 17h 22m 57s and the Declination is -15° 19’ 43” (apparent coordinates). The magnitude of Asteroid 5 Astraea is 10.98 (data provided by JPL Horizons).

Finder Charts

Map showing Asteroid 5 Astraea in Serpens on May, 13 2025. Field of view: 50x30 degrees
View interactive star map
Sky map showing Asteroid 5 Astraea in Serpens on May, 13 2025. Field of view: 15x9 degrees. View in interactive sky chart

High precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 5 Astraea is right now. Click on the image to see a more detailed fullscreen tracker view.

5 Astraea
RA: 17h 21m 30s
Dec: -15° 18’ 20”
Deep sky finder chart for Asteroid 5 Astraea. Field of view: 60x40 arcmins. View in deep sky object tracker

Also check out Where is Asteroid 5 Astraea?, a page that provides all the information needed to find Asteroid 5 Astraea in the sky and additional links to sky charts.

Celestial Coordinates

Apparent

17h 22m 57s
-15° 19’ 43”
02h 38m 52s
20h 01m 50s

J2000

17h 21m 30s
-15° 18’ 20”

Additional Information

Serpens
10.98

Rise and Set Times

Today's rise, transit and set times of Asteroid 5 Astraea from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 105.3°
Max altitude: 23.2°
Azimuth: 254.7°
  • 5 Astraea is above the horizon from Greenwich, UK.
  • Right now it is placed in the South-West direction at an altitude of 14.78° above the horizon.
  • Given its current magnitude, 5 Astraea 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 5 Astraea from Earth is currently 257,754,425.0 kilometers, equivalent to 1.7229819101 Astronomical Units. Light takes 14m 19.776s to travel from Asteroid 5 Astraea and arrive to us.

257,754,425.0
1.7229819101
14m 19.776s

The following chart shows the distance of Asteroid 5 Astraea 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 5 Astraea 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 5 Astraea 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 5 Astraea to Earth happens on Fri Feb 13 1925 at a distance of 1.093100 Astronomical Units, or 163,525,365 kilometers:

Fri Feb 13 1925
163,525,365
1.093100

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 5 Astraea, 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 5 Astraea as a function of time

Orbital Elements

The following table lists the orbital elements of Asteroid 5 Astraea at epoch 24 February 2023 00:00 UTC (JD: 2460000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.18792368
Orbit inclination i 5.36012857°
Perihelion distance q 2.09409950 AU
313,272,827 km
Aphelion distance Q 3.06329633 AU
458,262,609 km
Semi-major axis a 2.57869792 AU
385,767,718 km
Orbital period period 4.1410 years
1,512.5131 days
Date of perihelion transit Tp 2024-May-06 19:49:09
2,460,437.3258 JD
Next perihelion transit 2028-Jun-27 08:07
2,461,949.8389 JD
Argument of perihelion peri 358.88655645318°
Longitude of the ascending node node 141.52276093715°
Mean anomaly M 256.0291368156°
Mean motion n 0.23801448°/day

Orbit Visualization

Orbit Diagram of Asteroid 5 Astraea
View Asteroid 5 Astraea in the 3D Solar System Simulator

Physical Data

The following shows the known values of the most important physical parameters of Asteroid 5 Astraea. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 119.07 km 0.0093
Sideral Rotation 16.8000 hours 0.7019
Absolute Magnitude 6.85
Geometric Albedo 0.2268

15 Days Ephemeris

The following table lists the ephemerides of Asteroid 5 Astraea 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 May 06 17h 27m 27s -15° 32’ 05” 11.11 Serpens
2025 May 07 17h 26m 54s -15° 30’ 18” 11.09 Serpens
2025 May 08 17h 26m 20s -15° 28’ 31” 11.07 Serpens
2025 May 09 17h 25m 44s -15° 26’ 45” 11.05 Serpens
2025 May 10 17h 25m 06s -15° 25’ 03” 11.03 Serpens
2025 May 11 17h 24m 28s -15° 23’ 21” 11.02 Serpens
2025 May 12 17h 23m 47s -15° 21’ 41” 11.00 Serpens
2025 May 13 17h 23m 06s -15° 20’ 02” 10.98 Serpens
2025 May 14 17h 22m 22s -15° 18’ 26” 10.96 Serpens
2025 May 15 17h 21m 38s -15° 16’ 51” 10.94 Serpens
2025 May 16 17h 20m 53s -15° 15’ 19” 10.92 Serpens
2025 May 17 17h 20m 06s -15° 13’ 49” 10.90 Serpens
2025 May 18 17h 19m 19s -15° 12’ 20” 10.88 Serpens
2025 May 19 17h 18m 30s -15° 10’ 55” 10.87 Ophiuchus

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