Asteroid 3 Juno

3 Juno is a large main-belt asteroid located between the orbits of Mars and Jupiter. It was discovered on 1 September 1804 by German astronomer Karl Ludwig Harding and is one of the largest asteroids in the solar system, with a diameter of approximately 247 kilometers. Juno has an irregular shape, with a rotation period of about 7.2 hours, and its surface is covered in numerous impact craters, some of which are several kilometers in diameter. Juno's composition is thought to be a mixture of rock and metal, similar to the composition of the Earth's crust. Juno orbits the Sun once every 4.36 Earth years and has been observed by ground-based telescopes, as well as by the Hubble Space Telescope and the Dawn spacecraft. The observations have revealed insights into its geology, composition, and history, including potential signs of water and organic molecules on its surface.

Asteroid 3 Juno is currently in the constellation of Orion.

The current Right Ascension of Asteroid 3 Juno is 05h 04m 16s and the Declination is +14° 05’ 02” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom edit_location_alt). The current magnitude of Asteroid 3 Juno is 9.43 (JPL).

Today's rise, transit and set times of Asteroid 3 Juno from Greenwich, United Kingdom edit_location_alt (all times relative to the local timezone Europe/London):

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

• Position and finder charts (see also Where is Asteroid 3 Juno?)
• Distance from Earth (see also How far is Asteroid 3 Juno from Earth?)
• When does Asteroid 3 Juno rise and set?
• Brightness (see also How bright is Asteroid 3 Juno?)
• Orbital elements. Detailed information about Asteroid 3 Juno orbital parameters.
• Interactive orbit visualization. 3d visualization showing the orbit of Asteroid 3 Juno with respect to the major Solar System objects.
• Physical data. Detailed information about physical properties of Asteroid 3 Juno, such as mass and geometric properties.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Asteroid 3 Juno for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Asteroid 3 Juno in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Asteroid 3 Juno with your telescope or on your astrophotographies.

Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 3 Juno is right now. Click on the image to see a more detailed fullscreen tracker view.

Also check out Where is Asteroid 3 Juno?, a page that provides all the information needed to find Asteroid 3 Juno in the sky and additional links to sky charts.

Asteroid 3 Juno Distance from Earth

The distance of Asteroid 3 Juno from Earth is currently 448,734,287 kilometers, equivalent to 2.999603 Astronomical Units. Light takes 24 minutes and 56.8165 seconds to travel from Asteroid 3 Juno and arrive to us.

The following chart shows the distance of Asteroid 3 Juno 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 3 Juno from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest Approach of Asteroid 3 Juno to Earth

Between 1 January 1600 and 30 December 2499, the closest approach of Asteroid 3 Juno to Earth happens on Thu Nov 5 1874 at a distance of 1.028769 Astronomical Units, or 153,901,649 kilometers:

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

Asteroid 3 Juno Brightness and Light Curve

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 3 Juno, 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.

Visualization of Asteroid 3 Juno Orbit

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

Asteroid 3 Juno 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 3 Juno computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 3 Juno in our Online Planetarium at the chosen date.

Date	Right AscensionR.A.	DeclinationDec.	MagnitudeMag	Constellation
2023 May 23	04h 46m 30s	+13° 34’ 41”	9.44	Orion
2023 May 24	04h 48m 51s	+13° 39’ 11”	9.44	Orion
2023 May 25	04h 51m 15s	+13° 43’ 32”	9.44	Orion
2023 May 26	04h 53m 36s	+13° 47’ 44”	9.44	Orion
2023 May 27	04h 55m 59s	+13° 51’ 51”	9.43	Orion
2023 May 28	04h 58m 22s	+13° 55’ 47”	9.43	Orion
2023 May 29	05h 00m 43s	+13° 59’ 38”	9.43	Orion
2023 May 30	05h 03m 06s	+14° 03’ 19”	9.43	Orion
2023 May 31	05h 05m 29s	+14° 06’ 52”	9.43	Orion
2023 Jun 01	05h 07m 50s	+14° 10’ 18”	9.42	Orion
2023 Jun 02	05h 10m 14s	+14° 13’ 36”	9.42	Orion
2023 Jun 03	05h 12m 35s	+14° 16’ 45”	9.42	Orion
2023 Jun 04	05h 14m 58s	+14° 19’ 48”	9.42	Orion
2023 Jun 05	05h 17m 21s	+14° 22’ 41”	9.42	Orion