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public LocationGreenwich, UK
Sunrise: 4:57 
Transit: 13:04 
Sunset: 21:10
sunny   (Daytime)   What's Visible Now?
Near Earth Objects » 

Asteroid 99942 Apophis

Above the horizon.  Rise: 5:06 | Tran: 12:57 | Set: 20:47
Altitude: 54.5°   Azimuth: 217.2°   Direction: South-West
Please note: this information pertains to a Near-Earth Object (NEO). During close approaches, our current computational model is not able to provide an accurate position, due to the high speeds of these objects. We plan to refine our algorithms to improve accuracy in the future. JPL Horizons can compute precise positions in these situations.

Asteroid 99942 Apophis is currently in the constellation of Gemini, at a distance of 306,432,595 kilometers from Earth.

The current Right Ascension of Asteroid 99942 Apophis is 07h 21m 10s and the Declination is +20° 26’ 08” (topocentric coordinates computed for Greenwich, UK).

The magnitude of Asteroid 99942 Apophis is 20.94 (data provided by JPL Horizons)

Finder chart of 99942 Apophis in Gemini on July,12 2024
Map showing Asteroid 99942 Apophis in Gemini on July, 12 2024. Field of view: 50x30 degrees
View interactive star map

07h 21m 10s
+20° 26’ 08”

Today's rise, transit and set times of Asteroid 99942 Apophis from Greenwich, UK (all times relative to the local timezone Europe/London):

Azimuth: 69.5°
Max altitude: 59.0°
Azimuth: 290.4°
  • 99942 Apophis is above the horizon from Greenwich, UK.
  • Right now it is placed in the South-West direction at an altitude of 55° above the horizon.
  • Given its current magnitude, 99942 Apophis is visible only through long exposure photography.
  • 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 Resources

Asteroid 99942 Apophis Position and Finder Charts

Finder chart of 99942 Apophis
Sky map showing Asteroid 99942 Apophis in Gemini on July, 12 2024. Field of view: 10x6 degrees. View in interactive sky chart

High 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.

99942 Apophis
RA: 07h 21m 10s
Dec: +20° 26’ 08”
Deep sky finder chart for Asteroid 99942 Apophis. Field of view: 60x40 arcmins. View in deep sky object tracker

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 306,432,595 kilometers, equivalent to 2.048375 Astronomical Units. Light takes 17 minutes and 2.1491 seconds to travel from Asteroid 99942 Apophis and arrive to us.

17 minutes and 2.1491 seconds

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.

Chart of the distance of Asteroid 99942 Apophis from Earth in Astronomical Units (au)

The value of the reported distance might be somewhat inaccurate around the times of closest approach for objects passing extremely close to Earth.

Closest Approach of Asteroid 99942 Apophis to Earth

During the next 10 years, the closest approach of Asteroid 99942 Apophis to Earth happens on Fri Apr 13 2029 at a distance of 0.000254 Astronomical Units, or 38,012 kilometers:

Fri Apr 13 2029

Asteroid 99942 Apophis Brightness and Light Curve

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.

Chart of the magnitude of Asteroid 99942 Apophis as a function of time

Asteroid 99942 Apophis Orbital Elements

The following table lists the orbital elements of Asteroid 99942 Apophis at epoch 30 March 2024 00:00 UTC (JD: 2460400.5). Source: JPL Small-Body Database

Element Symbol Value
Orbit eccentricity e 0.19129073
Orbit inclination i 3.33973639°
Perihelion distance q 0.74607647 AU
111,611,452 km
Aphelion distance Q 1.09902781 AU
164,412,220 km
Semi-major axis a 0.92255214 AU
138,011,836 km
Orbital period period 0.8861 years
323.6569 days
Date of perihelion transit Tp 2024-Mar-26 07:17:55
2,460,395.8041 JD
Next perihelion transit 2025-Feb-12 23:03
2,460,719.4610 JD
Argument of perihelion peri 126.68323178996°
Longitude of the ascending node node 203.91537218109°
Mean anomaly M 5.2231884488416°
Mean motion n 1.11228913°/day

Visualization of Asteroid 99942 Apophis Orbit

Orbit Diagram of Asteroid 99942 Apophis
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.

Date Right AscensionR.A. DeclinationDec. MagnitudeMag Constellation
2024 Jul 05 06h 51m 39s +21° 16’ 26” 20.87 Gemini
2024 Jul 06 06h 55m 36s +21° 10’ 50” 20.88 Gemini
2024 Jul 07 06h 59m 32s +21° 04’ 54” 20.89 Gemini
2024 Jul 08 07h 03m 29s +20° 58’ 38” 20.90 Gemini
2024 Jul 09 07h 07m 23s +20° 52’ 05” 20.91 Gemini
2024 Jul 10 07h 11m 17s +20° 45’ 11” 20.92 Gemini
2024 Jul 11 07h 15m 10s +20° 37’ 59” 20.92 Gemini
2024 Jul 12 07h 19m 00s +20° 30’ 29” 20.93 Gemini
2024 Jul 13 07h 22m 51s +20° 22’ 41” 20.94 Gemini
2024 Jul 14 07h 26m 42s +20° 14’ 35” 20.95 Gemini
2024 Jul 15 07h 30m 30s +20° 06’ 11” 20.96 Gemini
2024 Jul 16 07h 34m 18s +19° 57’ 29” 20.97 Gemini
2024 Jul 17 07h 38m 05s +19° 48’ 32” 20.98 Gemini
2024 Jul 18 07h 41m 53s +19° 39’ 16” 20.99 Gemini