Asteroid 99942 Apophis
Asteroid 99942 Apophis is in the constellation of
Gemini,
at a distance of
Finder Charts
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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.
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.
Celestial Coordinates
Apparent
J2000
Additional Information
Rise and Set Times
Today's rise, transit and set times of Asteroid 99942 Apophis from Greenwich, UK (all times relative to the local timezone Europe/London):
- 99942 Apophis is above the horizon from Greenwich, UK.
- Right now it is placed in the South-South-East direction at an altitude of 57.20° above the horizon.
- Given its current magnitude, 99942 Apophis is visible only through long exposure photography.
- Go to interactive sky chart
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Distance from Earth
The distance of Asteroid 99942 Apophis from Earth is currently
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.
Closest Approach
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 38,011 kilometers:
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.
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 |
View Asteroid 99942 Apophis in the 3D Solar System Simulator
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 |
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. Apparent celestial coordinates are provided.
| Date | Right AscensionR.A. | DeclinationDec. | MagnitudeMag | Constellation |
|---|---|---|---|---|
| 2025 Jun 09 | 06h 29m 35s | +21° 28’ 18” | 21.49 | Gemini |
| 2025 Jun 10 | 06h 33m 31s | +21° 25’ 16” | 21.50 | Gemini |
| 2025 Jun 11 | 06h 37m 25s | +21° 21’ 54” | 21.50 | Gemini |
| 2025 Jun 12 | 06h 41m 19s | +21° 18’ 11” | 21.50 | Gemini |
| 2025 Jun 13 | 06h 45m 12s | +21° 14’ 10” | 21.51 | Gemini |
| 2025 Jun 14 | 06h 49m 05s | +21° 09’ 48” | 21.51 | Gemini |
| 2025 Jun 15 | 06h 52m 57s | +21° 05’ 08” | 21.52 | Gemini |
| 2025 Jun 16 | 06h 56m 48s | +21° 00’ 09” | 21.52 | Gemini |
| 2025 Jun 17 | 07h 00m 37s | +20° 54’ 50” | 21.53 | Gemini |
| 2025 Jun 18 | 07h 04m 26s | +20° 49’ 13” | 21.53 | Gemini |
| 2025 Jun 19 | 07h 08m 15s | +20° 43’ 18” | 21.53 | Gemini |
| 2025 Jun 20 | 07h 12m 03s | +20° 37’ 05” | 21.54 | Gemini |
| 2025 Jun 21 | 07h 15m 50s | +20° 30’ 33” | 21.54 | Gemini |
| 2025 Jun 22 | 07h 19m 37s | +20° 23’ 44” | 21.54 | Gemini |
Additional Resources on TheSkyLive
- Asteroid 99942 Apophis: Complete reference information on TheSkyLive.com.
- Where is Asteroid 99942 Apophis?: Key information on where to find Asteroid 99942 Apophis in the sky.
- Distance from Earth: Find out how far Asteroid 99942 Apophis is from Earth right now.
- How Bright is Asteroid 99942 Apophis?: Current visual brightness (magnitude) and apparent size.
- Rise and Set Times: Rise and set times of Asteroid 99942 Apophis from your location.
- Interactive Sky Map: Planetarium-style interactive visualization of Asteroid 99942 Apophis's position in the sky.
- Ephemeris: 15 days Asteroid 99942 Apophis's computed ephemeris.
- Orbital elements: Information about Asteroid 99942 Apophis orbital parameters.
- Orbit Visualization: 3D interactive visualization showing the orbit of Asteroid 99942 Apophis with respect to the major Solar System objects.
- Physical Data: Detailed information about physical properties of Asteroid 99942 Apophis, such as mass and geometric properties.