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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 Ophiucus on December, 10 2018
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]
17h 10m 09s
-22° 30’ 50”
21.96

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: 112.5°
Max altitude: 16.0°
Azimuth: 247.5°

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
2018 Dec 03 16h 45m 43s -22° 09’ 45” 22.07 Ophiucus
2018 Dec 04 16h 48m 56s -22° 13’ 19” 22.06 Ophiucus
2018 Dec 05 16h 52m 09s -22° 16’ 40” 22.05 Ophiucus
2018 Dec 06 16h 55m 23s -22° 19’ 45” 22.04 Ophiucus
2018 Dec 07 16h 58m 36s -22° 22’ 36” 22.02 Ophiucus
2018 Dec 08 17h 01m 49s -22° 25’ 12” 22.01 Ophiucus
2018 Dec 09 17h 05m 02s -22° 27’ 33” 21.99 Ophiucus
2018 Dec 10 17h 08m 14s -22° 29’ 42” 21.97 Ophiucus
2018 Dec 11 17h 11m 26s -22° 31’ 33” 21.96 Ophiucus
2018 Dec 12 17h 14m 39s -22° 33’ 12” 21.97 Ophiucus
2018 Dec 13 17h 17m 52s -22° 34’ 36” 21.99 Ophiucus
2018 Dec 14 17h 21m 03s -22° 35’ 45” 22.01 Ophiucus
2018 Dec 15 17h 24m 16s -22° 36’ 39” 22.03 Ophiucus
2018 Dec 16 17h 27m 29s -22° 37’ 19” 22.05 Ophiucus

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 2075

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 2075

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* 2033-Dec-21
Distance of closest approach* 0.04745041 AU
7,098,480 km

* NOTE: values for the closest approach are computed for the time interval between 2013-Jan-01 and 2075-Dec-31, with a sampling interval of 1 day.