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]:

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Additional information about Asteroid 99942 Apophis available on TheSkyLive:

Available Resources

• Position and finder charts (see also Where is Asteroid 99942 Apophis?)
• Distance from Earth (see also How far is Asteroid 99942 Apophis from Earth?)
• Rise and set times (see also When does Asteroid 99942 Apophis rise and set?)
• Brightness (see also How bright is Asteroid 99942 Apophis?)
• Physical data. Detailed information about physical properties of Asteroid 99942 Apophis, such as mass and geometric properties.
• 15 days ephemerides. Table showing celestial coordinates and magnitude of Asteroid 99942 Apophis for the past and next 7 days.
• Interactive sky chart. An online planetarium application that shows where to locate Asteroid 99942 Apophis in the sky from your location.
• Live position tracker. A high precision sky chart that uses real deep sky imagery to help locate Asteroid 99942 Apophis with your telescope or on your astrophotographies.

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 current visual magnitude of Asteroid 99942 Apophis is 21.54.

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

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, 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 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
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