Asteroid 99942 Apophis
Asteroid 99942 Apophis is currently in the constellation of Crater. The current Right Ascension of Asteroid 99942 Apophis is 11h 43m 09s and the Declination is -17° 46’ 18” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 99942 Apophis is 18.21 (JPL).
Summary of key facts about Asteroid 99942 Apophis [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]:
- 99942 Apophis is above the horizon from Greenwich, United Kingdom [change].
- It is visible looking in the South-West direction at an altitude of 10° above the horizon.
- Given its current magnitude, 99942 Apophis is visible only through long exposure photography.
- See also 99942 Apophis rise and set times.
- Go to interactive sky chart
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 99942 Apophis available on TheSkyLive:
Asteroid 99942 Apophis Position and Finder Charts
Below we provide Asteroid 99942 Apophis 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.
Higher precision deep sky finder chart, 60 arcmin wide, showing where Asteroid 99942 Apophis is right now. Click on the image to see a more detailed fullscreen tracker view.
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 from Earth
The distance of Asteroid 99942 Apophis from Earth is currently 29,689,187 kilometers, equivalent to 0.198460 Astronomical Units. Light takes 1 minutes and 39.0325 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 0.000437 Astronomical Units, or 65,410 kilometers:
NOTE: values for the closest approach are computed with a sampling interval of 1 day.
Asteroid 99942 Apophis brightness
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
The rise and set times are defined as the time at which the upper limb of Asteroid 99942 Apophis 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 99942 Apophis Orbital Elements
|Perihelion distance||q||0.74607243 AU
|Date of perihelion transit||Tp||2009-Mar-04 09:54:01
|Next perihelion transit||2010-Jan-22 00:13
|Argument of perihelion||peri||126.40187952485°|
|Longitude of the ascending node||node||204.44602891898°|
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!
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|
|Sideral Rotation||30.4000 hours||1.2701|
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.
|2021 Jan 11||11h 44m 00s||-16° 18’ 08”||18.52||Crater|
|2021 Jan 12||11h 44m 05s||-16° 31’ 00”||18.48||Crater|
|2021 Jan 13||11h 44m 08s||-16° 43’ 37”||18.44||Crater|
|2021 Jan 14||11h 44m 07s||-16° 55’ 59”||18.39||Crater|
|2021 Jan 15||11h 44m 00s||-17° 08’ 06”||18.35||Crater|
|2021 Jan 16||11h 43m 50s||-17° 19’ 53”||18.31||Crater|
|2021 Jan 17||11h 43m 36s||-17° 31’ 22”||18.26||Crater|
|2021 Jan 18||11h 43m 18s||-17° 42’ 30”||18.22||Crater|
|2021 Jan 19||11h 42m 53s||-17° 53’ 17”||18.17||Crater|
|2021 Jan 20||11h 42m 25s||-18° 03’ 42”||18.13||Crater|
|2021 Jan 21||11h 41m 52s||-18° 13’ 42”||18.08||Crater|
|2021 Jan 22||11h 41m 13s||-18° 23’ 17”||18.03||Crater|
|2021 Jan 23||11h 40m 30s||-18° 32’ 25”||17.98||Crater|
|2021 Jan 24||11h 39m 39s||-18° 41’ 03”||17.93||Crater|