Your guide to the Solar System and the night sky
Latest Perseverance Images received 1 hours 44 mins ago for Sol74
🌎  Greenwich, United Kingdom [change]

Asteroid 162173 Ryugu (1999 JU3)

Asteroid 162173 Ryugu (1999 JU3) is currently in the constellation of Crater. The current Right Ascension of Asteroid 162173 Ryugu (1999 JU3) is 11h 46m 55s and the Declination is -13° 39’ 53” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 162173 Ryugu (1999 JU3) is 18.72 (JPL).

Summary of key facts about Asteroid 162173 Ryugu (1999 JU3) [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]:

11h 46m 55s
-13° 39’ 53”
Crater
18.72

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 162173 Ryugu (1999 JU3) available on TheSkyLive:

Available Resources

Asteroid 162173 Ryugu (1999 JU3) Position and Finder Charts

Below we provide Asteroid 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3) in Crater on May, 06 2021
Field of view: 50x30 degrees
View fullscreen
Map showing Asteroid 162173 Ryugu (1999 JU3) in Crater on May, 06 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 162173 Ryugu (1999 JU3) is right now. Click on the image to see a more detailed fullscreen tracker view.

162173 Ryugu (1999 JU3)
RA: 11h 46m 55s
Dec: -13° 39’ 53”
Deep sky finder chart for Asteroid 162173 Ryugu (1999 JU3)
Field of view: 60x40 arcmins
View fullscreen

Also check out Where is Asteroid 162173 Ryugu (1999 JU3)?, a page that provides all the information needed to find Asteroid 162173 Ryugu (1999 JU3) in the sky and additional links to sky charts.

Asteroid 162173 Ryugu (1999 JU3) Distance from Earth

The distance of Asteroid 162173 Ryugu (1999 JU3) from Earth is currently 45,519,932 kilometers, equivalent to 0.304282 Astronomical Units. Light takes 2 minutes and 31.8381 seconds to travel from Asteroid 162173 Ryugu (1999 JU3) and arrive to us.

45,519,932
0.304282
2 minutes and 31.8381 seconds

The following chart shows the distance of Asteroid 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3) from Earth is also available as a real time updated value in the Live Position and Data Tracker.

Closest approach of Asteroid 162173 Ryugu (1999 JU3) to Earth

Between January 2013 and December 2100, the closest approach of Asteroid 162173 Ryugu (1999 JU3) to Earth happens on Sun Dec 6 2076 at a distance of 0.010460 Astronomical Units, or 1,564,767 kilometers:

Sun Dec 6 2076
1,564,767
0.010460

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

Asteroid 162173 Ryugu (1999 JU3) brightness

The current visual magnitude of Asteroid 162173 Ryugu (1999 JU3) is 18.72.

18.72

The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 162173 Ryugu (1999 JU3), 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 162173 Ryugu (1999 JU3) between January 2013 and December 2100

Asteroid 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3) rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 103.6°
Max altitude: 24.9°
Azimuth: 256.2°

The rise and set times are defined as the time at which the upper limb of Asteroid 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3) Orbital Elements

The following table lists the orbital elements of Asteroid 162173 Ryugu (1999 JU3) at epoch 16 December 2020 00:00 UTC (JD: 2459200.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.19099437
Orbit inclination i 5.88371601°
Perihelion distance q 0.96317675 AU
144,089,192 km
Aphelion distance Q 1.41796057 AU
212,123,883 km
Semi-major axis a 1.19056866 AU
178,106,537 km
Orbital period period 1.3000 years
474.4933 days
Date of perihelion transit Tp 2021-Jan-04 22:15:01
2,459,219.4271 JD
Next perihelion transit 2022-Apr-24 10:05
2,459,693.9204 JD
Argument of perihelion peri 211.4437098978°
Longitude of the ascending node node 251.53585168923°
Mean anomaly M 345.6399297063°
Mean motion n 0.75870405°/day

Visualization of Asteroid 162173 Ryugu (1999 JU3) Orbit

This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 162173 Ryugu (1999 JU3) with respect of the Sun and the orbits of the major planets. The position of Asteroid 162173 Ryugu (1999 JU3) 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 162173 Ryugu (1999 JU3)
View Asteroid 162173 Ryugu (1999 JU3) in the 3D Solar System Simulator

Asteroid 162173 Ryugu (1999 JU3) 15 Days Ephemeris

The following table lists the ephemerides of Asteroid 162173 Ryugu (1999 JU3) computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 162173 Ryugu (1999 JU3) in our Online Planetarium at the chosen date.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2021 Apr 29 11h 34m 15s -16° 25’ 35” 18.33 Crater
2021 Apr 30 11h 35m 53s -16° 01’ 00” 18.38 Crater
2021 May 01 11h 37m 31s -15° 37’ 18” 18.44 Crater
2021 May 02 11h 39m 10s -15° 14’ 29” 18.49 Crater
2021 May 03 11h 40m 49s -14° 52’ 28” 18.54 Crater
2021 May 04 11h 42m 29s -14° 31’ 18” 18.59 Crater
2021 May 05 11h 44m 08s -14° 10’ 58” 18.64 Crater
2021 May 06 11h 45m 50s -13° 51’ 24” 18.69 Crater
2021 May 07 11h 47m 31s -13° 32’ 39” 18.74 Crater
2021 May 08 11h 49m 14s -13° 14’ 39” 18.80 Crater
2021 May 09 11h 50m 56s -12° 57’ 25” 18.85 Crater
2021 May 10 11h 52m 40s -12° 40’ 58” 18.90 Crater
2021 May 11 11h 54m 24s -12° 25’ 14” 18.95 Crater
2021 May 12 11h 56m 08s -12° 10’ 13” 19.00 Crater