Asteroid 162173 Ryugu (1999 JU3)
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.
High Precision Live Sky Chart
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.
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!
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.
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.
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.