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Asteroid 162173 Ryugu (1999 JU3)

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Asteroid 162173 Ryugu (1999 JU3) Sky Charts and Coordinates

This is a simplified sky chart, showing where Asteroid 162173 Ryugu (1999 JU3) is now with respect to the brightest stars and constellations.

More advanced sky charts are available on TheSkyLive for this object: 1) the Online Planetarium which is interactive and allows to select dates and additional objects to visualize; and 2) the Live Position and Data Tracker which provides the highest precision position data and features deep sky imagery from the Digitized Sky Survey.

Asteroid 162173 Ryugu (1999 JU3) in Aquarius on February, 23 2019
High Precision Live Sky Chart
 = visible to the naked eye
 = binocular, brighter than 10th magnitude
= current altitude ≥ 30°   = current altitude < 30°   = below the horizon
Location: Greenwich, United Kingdom [change]
20h 58m 47s
-14° 22’ 37”
22.65

Asteroid 162173 Ryugu (1999 JU3) Rise and Set Times

Today's Asteroid 162173 Ryugu (1999 JU3) rise, transit and set times from Greenwich, United Kingdom [change]. All times are relative to the Europe/London timezone.

Azimuth: 104.4°
Max altitude: 24.2°
Azimuth: 255.7°

Asteroid 162173 Ryugu (1999 JU3) Orbit Diagram

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) 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
2019 Feb 16 20h 37m 50s -15° 58’ 21” 22.63 Capricornus
2019 Feb 17 20h 40m 45s -15° 45’ 38” 22.63 Capricornus
2019 Feb 18 20h 43m 38s -15° 32’ 44” 22.64 Capricornus
2019 Feb 19 20h 46m 32s -15° 19’ 42” 22.64 Capricornus
2019 Feb 20 20h 49m 26s -15° 06’ 29” 22.64 Capricornus
2019 Feb 21 20h 52m 19s -14° 53’ 08” 22.65 Capricornus
2019 Feb 22 20h 55m 13s -14° 39’ 36” 22.65 Capricornus
2019 Feb 23 20h 58m 05s -14° 25’ 54” 22.65 Aquarius
2019 Feb 24 21h 00m 57s -14° 12’ 05” 22.65 Aquarius
2019 Feb 25 21h 03m 51s -13° 58’ 05” 22.66 Aquarius
2019 Feb 26 21h 06m 42s -13° 43’ 55” 22.66 Aquarius
2019 Feb 27 21h 09m 33s -13° 29’ 38” 22.66 Aquarius
2019 Feb 28 21h 12m 25s -13° 15’ 11” 22.66 Aquarius
2019 Mar 01 21h 15m 17s -13° 00’ 34” 22.66 Aquarius

Distance of Asteroid 162173 Ryugu (1999 JU3) from Earth

The following chart shows the distance of Asteroid 162173 Ryugu (1999 JU3) from Earth as a function of time. Distance data is measured in Astronomical Units and sampled with a 2 days interval.

The reported distances might be inaccurate around the times of closest approach for objects passing extremely close to Earth. The value of the distance of 162173 Ryugu (1999 JU3) is also available as a real time updated value in the Live Position and Data Tracker.

Distance of Asteroid 162173 Ryugu (1999 JU3) from Earth between January 2013 and December 2100

Light Curve of Asteroid 162173 Ryugu (1999 JU3)

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) Orbital Elements

The following table lists the orbital elements of Asteroid 162173 Ryugu (1999 JU3) at epoch 11 December 2011 00:00 UTC (JD: 2455907.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.19022575
Orbit inclination i 5.88374239°
Perihelion distance q 0.96330811 AU
144,108,842 km
Aphelion distance Q 1.41589353 AU
211,814,658 km
Semi-major axis a 1.18960082 AU
177,961,750 km
Orbital period period 1.3000 years
473.9148 days
Date of perihelion transit Tp 2011-Dec-06 18:09:07
2,455,902.2563 JD
Next perihelion transit 2013-Mar-24 16:06
2,456,376.1712 JD
Argument of perihelion peri 211.42584970315°
Longitude of the ascending node node 251.61971097785°
Mean anomaly M 3.9832447394972°
Mean motion n 0.75963014°/day
Closest approach to Earth* 2076-Dec-06
Distance of closest approach* 0.01045950 AU
1,564,719 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2100-Dec-31, with a sampling interval of 1 day.