❤ Support this Project
Asteroid 5 Astraea Position Calculator
Compute the position of Asteroid 5 Astraea for any date and time between 1 January 1900 and 31 December 2099 and visualize the results on an interactive sky map.
Asteroid 5 Astraea
Asteroid 5 Astraea is in the constellation of
Leo,
at a distance of
View interactive star map
5 Astraea is a relatively small main-belt asteroid located between the orbits of Mars and Jupiter. It was discovered 8 December 1845 by German astronomer Karl Ludwig Hencke and is named after the Greek goddess of justice. Astraea has a diameter of approximately 119 kilometers and is irregularly shaped, with a rotation period of about 16 hours. Its surface is covered in numerous impact craters, some of which are several kilometers in diameter. Astraea's composition is thought to be a mixture of rock and metal, similar to the composition of the Earth's crust. It has a relatively low density compared to other asteroids, indicating that it may have a porous interior. Astraea orbits the Sun once every 4.14 Earth years and has been observed by ground-based telescopes, which have revealed insights into its geology, composition, and history.
Celestial Coordinates
Apparent
J2000
Additional Information
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):
- 5 Astraea is above the horizon from Greenwich, UK.
- Right now it is placed in the West direction at an altitude of 18.27° above the horizon.
- Given its current magnitude, 5 Astraea 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.
Finder Charts
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.
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.
Distance from Earth
The distance of Asteroid 5 Astraea from Earth is currently
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.
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:
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.
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
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 |
|---|---|---|---|---|
| 2024 Jul 21 | 10h 17m 45s | +12° 22’ 59” | 11.79 | Leo |
| 2024 Jul 22 | 10h 19m 48s | +12° 12’ 37” | 11.79 | Leo |
| 2024 Jul 23 | 10h 21m 50s | +12° 02’ 12” | 11.79 | Leo |
| 2024 Jul 24 | 10h 23m 52s | +11° 51’ 43” | 11.79 | Leo |
| 2024 Jul 25 | 10h 25m 55s | +11° 41’ 10” | 11.79 | Leo |
| 2024 Jul 26 | 10h 27m 57s | +11° 30’ 35” | 11.79 | Leo |
| 2024 Jul 27 | 10h 29m 58s | +11° 19’ 56” | 11.79 | Leo |
| 2024 Jul 28 | 10h 32m 00s | +11° 09’ 13” | 11.79 | Leo |
| 2024 Jul 29 | 10h 34m 01s | +10° 58’ 28” | 11.79 | Leo |
| 2024 Jul 30 | 10h 36m 03s | +10° 47’ 39” | 11.79 | Leo |
| 2024 Jul 31 | 10h 38m 05s | +10° 36’ 47” | 11.78 | Leo |
| 2024 Aug 01 | 10h 40m 06s | +10° 25’ 52” | 11.78 | Leo |
| 2024 Aug 02 | 10h 42m 08s | +10° 14’ 54” | 11.78 | Leo |
| 2024 Aug 03 | 10h 44m 09s | +10° 03’ 54” | 11.78 | Leo |
Additional Resources
- Position and finder charts (see also Where is Asteroid 5 Astraea?)
- Distance from Earth (see also How far is Asteroid 5 Astraea from Earth?)
- When does Asteroid 5 Astraea rise and set?
- Brightness (see also How bright is Asteroid 5 Astraea?)
- Orbital elements. Detailed information about Asteroid 5 Astraea orbital parameters.
- Interactive orbit visualization. 3d visualization showing the orbit of Asteroid 5 Astraea with respect to the major Solar System objects.
- Physical data. Detailed information about physical properties of Asteroid 5 Astraea, such as mass and geometric properties.
- 15 days ephemerides. Table showing celestial coordinates and magnitude of Asteroid 5 Astraea for the past and next 7 days.
- Interactive sky chart. An online planetarium application that shows where to locate Asteroid 5 Astraea in the sky from your location.
- Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Asteroid 5 Astraea with your telescope or on your astrophotographies.