Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

Asteroid 3 Juno

Asteroid 3 Juno is currently in the constellation of Ophiucus. The current Right Ascension of Asteroid 3 Juno is 16h 43m 23s and the Declination is -11° 42’ 05” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 3 Juno is 11.51 (JPL).

Summary of key facts about Asteroid 3 Juno [tip: you can also create a Quick Access page for this data if you access it frequently and would like to have a simpler view]:

16h 43m 23s
-11° 42’ 05”
Ophiucus
11.51
  • 3 Juno is above the horizon from Greenwich, United Kingdom [change].
  • It is visible looking in the South-South-West direction at an altitude of 23° above the horizon.
  • Given its current magnitude, 3 Juno is visible with the help of a telescope havng an aperture of 4 inches (100mm) or more.
  • See also 3 Juno rise and set times.
  • 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 information about Asteroid 3 Juno available on TheSkyLive:

Available Resources

Asteroid 3 Juno Position and Finder Charts

Below we provide Asteroid 3 Juno finder charts showing where the object is right now in the sky with respect to the brightest stars. The first finder chart has a field of view of 50 degrees, while the second one has a field of view of 10 degrees. Click on each finder chart to access a full screen interactive Online Planetarium.

Map showing Asteroid 3 Juno in Ophiucus on January, 24 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid 3 Juno in Ophiucus on January, 24 2021
Field of view: 10x6 degrees
View fullscreen
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]

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.

3 Juno
RA: 16h 43m 23s
Dec: -11° 42’ 05”
Deep sky finder chart for Asteroid 3 Juno
Field of view: 60x40 arcmins
View fullscreen

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 573,584,989 kilometers, equivalent to 3.834179 Astronomical Units. Light takes 31 minutes and 53.2736 seconds to travel from Asteroid 3 Juno and arrive to us.

573,584,989
3.834179
31 minutes and 53.2736 seconds

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.

Distance of Asteroid 3 Juno from Earth between January 2013 and December 2100

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 January 2013 and December 2100, the closest approach of Asteroid 3 Juno to Earth happens on Fri Nov 16 2018 at a distance of 1.035930 Astronomical Units, or 154,972,893 kilometers:

Fri Nov 16 2018
154,972,893
1.035930

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

Asteroid 3 Juno brightness

The current visual magnitude of Asteroid 3 Juno is 11.51.

11.51

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.

Predicted magnitude of Asteroid 3 Juno between January 2013 and December 2100

Asteroid 3 Juno rise and set times

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 101.7°
Max altitude: 26.8°
Azimuth: 258.3°

The rise and set times are defined as the time at which the upper limb of Asteroid 3 Juno touches the horizon, considering the effect of the atmospheric refraction. As the atmospheric conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.

Asteroid 3 Juno Orbital Elements

The following table lists the orbital elements of Asteroid 3 Juno at epoch 30 May 2020 00:00 UTC (JD: 2459000.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.25693643
Orbit inclination i 12.99104367°
Perihelion distance q 1.98270560 AU
296,608,537 km
Aphelion distance Q 3.35386498 AU
501,731,060 km
Semi-major axis a 2.66828529 AU
399,169,799 km
Orbital period period 4.3600 years
1,592.0138 days
Date of perihelion transit Tp 2018-Nov-23 07:00:45
2,458,445.7922 JD
Next perihelion transit 2023-Apr-03 07:20
2,460,037.8060 JD
Argument of perihelion peri 248.0661927877°
Longitude of the ascending node node 169.85148121231°
Mean anomaly M 125.43535422966°
Mean motion n 0.22612870°/day

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 Physical Data

The following shows the known values of the most important physical parameters of Asteroid 3 Juno. Source: JPL Small-Body Database

Physical Parameter Value Relative to Earth
Diameter 233.92 km 0.0184
Sideral Rotation 7.2100 hours 0.3012
Absolute Magnitude 5.33
Geometric Albedo 0.2383

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
2021 Jan 17 16h 34m 46s -11° 42’ 51” 11.52 Ophiucus
2021 Jan 18 16h 35m 57s -11° 42’ 59” 11.52 Ophiucus
2021 Jan 19 16h 37m 09s -11° 43’ 02” 11.52 Ophiucus
2021 Jan 20 16h 38m 18s -11° 43’ 01” 11.52 Ophiucus
2021 Jan 21 16h 39m 28s -11° 42’ 56” 11.51 Ophiucus
2021 Jan 22 16h 40m 37s -11° 42’ 47” 11.51 Ophiucus
2021 Jan 23 16h 41m 47s -11° 42’ 33” 11.51 Ophiucus
2021 Jan 24 16h 42m 55s -11° 42’ 12” 11.51 Ophiucus
2021 Jan 25 16h 44m 03s -11° 41’ 49” 11.50 Ophiucus
2021 Jan 26 16h 45m 10s -11° 41’ 21” 11.50 Ophiucus
2021 Jan 27 16h 46m 18s -11° 40’ 49” 11.50 Ophiucus
2021 Jan 28 16h 47m 23s -11° 40’ 10” 11.49 Ophiucus
2021 Jan 29 16h 48m 29s -11° 39’ 29” 11.49 Ophiucus
2021 Jan 30 16h 49m 36s -11° 38’ 43” 11.49 Ophiucus