Asteroid 99942 Apophis
Asteroid 99942 Apophis is currently in the constellation of Leo. The current Right Ascension of Asteroid 99942 Apophis is 10h 12m 38s and the Declination is +07° 41’ 17” (topocentric coordinates computed for the selected location: Greenwich, United Kingdom [change]). The current magnitude of Asteroid 99942 Apophis is 21.54 (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 West-South-West direction at an altitude of 32° 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 142,040,924 kilometers, equivalent to 0.949485 Astronomical Units. Light takes 7 minutes and 53.7975 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 0.000438 Astronomical Units, or 65,520 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 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 Oct 19||09h 50m 06s||+10° 00’ 21”||21.51||Leo|
|2021 Oct 20||09h 53m 08s||+09° 41’ 57”||21.52||Leo|
|2021 Oct 21||09h 56m 12s||+09° 23’ 27”||21.52||Leo|
|2021 Oct 22||09h 59m 13s||+09° 04’ 54”||21.53||Leo|
|2021 Oct 23||10h 02m 14s||+08° 46’ 17”||21.53||Leo|
|2021 Oct 24||10h 05m 16s||+08° 27’ 36”||21.54||Leo|
|2021 Oct 25||10h 08m 17s||+08° 08’ 49”||21.54||Leo|
|2021 Oct 26||10h 11m 17s||+07° 50’ 00”||21.54||Leo|
|2021 Oct 27||10h 14m 17s||+07° 31’ 08”||21.55||Leo|
|2021 Oct 28||10h 17m 16s||+07° 12’ 11”||21.55||Leo|
|2021 Oct 29||10h 20m 15s||+06° 53’ 12”||21.56||Leo|
|2021 Oct 30||10h 23m 12s||+06° 34’ 09”||21.56||Leo|
|2021 Oct 31||10h 26m 11s||+06° 15’ 03”||21.56||Sextans|
|2021 Nov 01||10h 29m 08s||+05° 55’ 54”||21.57||Sextans|