Asteroid 99942 Apophis
Asteroid 99942 Apophis Position
Asteroid 99942 Apophis is currently in the constellation of Ophiucus. The current Right Ascension is 16h 36m 49s and the Declination is -19° 37’ 10”.
Simplified sky chart showing where Asteroid 99942 Apophis is right now in the sky with respect to the brightest stars and constellations (see fuillscreen Online Planetarium)
Field of view: 60x30 degrees
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Hihgher precision deep sky finder chart showing where Asteroid 99942 Apophis is right now (view fullscreen)
Also check out Where is Asteroid 99942 Apophis?, a page that provides all the information needed to find Asteroid 99942 Apophis in the sky and additional links to sky charts.
Asteroid 99942 Apophis Distance
The distance of Asteroid 99942 Apophis from Earth is currently 130,876,701 kilometers, equivalent to 0.874857 Astronomical Units. Light takes 7 minutes and 16.5577 seconds to travel from Asteroid 99942 Apophis and arrive to us.
The following chart shows the distance of Asteroid 99942 Apophis 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.
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 99942 Apophis from Earth is also available as a real time updated value in the Live Position and Data Tracker.
Closest approach of Asteroid 99942 Apophis to Earth
Between January 2013 and December 2100 the closest approach of Asteroid 99942 Apophis to Earth happens on Sat Apr 14 2029 at a distance of 0.00043719 Astronomical Units, or 65,403 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Asteroid 99942 Apophis brightness
The current visual magnitude of Asteroid 99942 Apophis is 21.19.
The following chart is the predicted light curve (visual magnitude as a function of time) of Asteroid 99942 Apophis, 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 99942 Apophis 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 99942 Apophis rise, transit and set times from Greenwich, United Kingdom [change] are the following (all times relative to the local timezone Europe/London):
The rise and set times are defined as the time at which the upper limb of Asteroid 99942 Apophis touches the horizon, consideting the effect of the atmospheric refraction. As the atmoshpere conditions cannot be modeled precisely the times reported here should be considered correct with an approximation of few minutes.
Asteroid 99942 Apophis Orbital Elements
The following table lists the orbital elements of Asteroid 99942 Apophis at epoch 23 September 2008 00:00 UTC (JD: 2454733.5). Source: JPL Small-Body Database
| Element | Symbol | Value |
|---|---|---|
| Orbit eccentricity | e | 0.19119530 |
| Orbit inclination | i | 3.33136952° |
| Perihelion distance | q | 0.74607243 AU 111,610,847 km |
| Aphelion distance | Q |
1.09880417 AU 164,378,765 km |
| Semi-major axis | a |
0.92243830 AU 137,994,806 km |
| Orbital period | period |
0.8900 years 323.5969 days |
| Date of perihelion transit | Tp | 2009-Mar-04 09:54:01 2,454,894.9125 JD |
| Next perihelion transit | 2010-Jan-22 00:13 2,455,218.5095 JD |
|
| Argument of perihelion | peri | 126.40187952485° |
| Longitude of the ascending node | node | 204.44602891898° |
| Mean anomaly | M | 180.42937304564° |
| Mean motion | n | 1.11249504°/day |
Visualization of Asteroid 99942 Apophis Orbit
This 3d orbit diagram is a feature of our 3D Solar System Simulator and shows the orbit of Asteroid 99942 Apophis with respect of the Sun and the orbits of the major planets. The position of Asteroid 99942 Apophis 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 99942 Apophis in the 3D Solar System Simulator
Asteroid 99942 Apophis Physical Data
The following shows the known values of the most important physical parameters of Asteroid 99942 Apophis. Source: JPL Small-Body Database
| Physical Parameter | Value | Relative to Earth |
|---|---|---|
| Diameter | 0.325 km | 0.0000 |
| Sideral Rotation | 30.4000 hours | 1.2701 |
| Absolute Magnitude | 19.7 | |
| Geometric Albedo | 0.23 |
Asteroid 99942 Apophis 15 Days Ephemeris
The following table lists the ephemerides of Asteroid 99942 Apophis computed for the past and next 7 days, with a 24 hours interval. Click on each row of the table to locate Asteroid 99942 Apophis in our Online Planetarium at the chosen date.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2019 Oct 11 | 16h 04m 09s | -18° 12’ 52” | 21.23 | Scorpius |
| 2019 Oct 12 | 16h 08m 44s | -18° 25’ 57” | 21.22 | Scorpius |
| 2019 Oct 13 | 16h 13m 22s | -18° 38’ 39” | 21.22 | Scorpius |
| 2019 Oct 14 | 16h 18m 00s | -18° 51’ 03” | 21.21 | Scorpius |
| 2019 Oct 15 | 16h 22m 40s | -19° 03’ 06” | 21.20 | Scorpius |
| 2019 Oct 16 | 16h 27m 21s | -19° 14’ 49” | 21.20 | Ophiucus |
| 2019 Oct 17 | 16h 32m 03s | -19° 26’ 11” | 21.19 | Ophiucus |
| 2019 Oct 18 | 16h 36m 48s | -19° 37’ 09” | 21.19 | Ophiucus |
| 2019 Oct 19 | 16h 41m 34s | -19° 47’ 47” | 21.19 | Ophiucus |
| 2019 Oct 20 | 16h 46m 21s | -19° 58’ 01” | 21.18 | Ophiucus |
| 2019 Oct 21 | 16h 51m 10s | -20° 07’ 54” | 21.18 | Ophiucus |
| 2019 Oct 22 | 16h 55m 59s | -20° 17’ 22” | 21.17 | Ophiucus |
| 2019 Oct 23 | 17h 00m 51s | -20° 26’ 27” | 21.17 | Ophiucus |
| 2019 Oct 24 | 17h 05m 44s | -20° 35’ 08” | 21.16 | Ophiucus |