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Software for Predicting the circumstances of occultations:

Occult (free)

Occult is our primary software program for predicting the circumstances of many types of astronomic occultations. Occult will predict the circumstances of lunar occultations (total and grazing), asteroid occultations, occultations of planetary moons, and more. Occult Resources page (for download link and other info).

OccultWatcher (free)

Tangra 3 is a free open source corss-platform software for reducing astronomical video observations such as asteroid occultations and runs natively on Windows, Linux and Mac OSX. Occular, ROTE, PYOTE (free) Programs for deriving event times and likelihood from light curve data. Additional Occultation related Software. Download Box apps on all your devices: Mac, Windows, iPhone, Android, for seamless collaboration and security that satisfies even the most regulated industries. Where can I find a phone synchronization app? A synchronization client for Android phones named 'AsteroidOSSync' is available for you to download on F-Droid. Ubuntu Touch users can download 'Telescope' from the OpenStore. Download for Mac. To use the Signal desktop app, Signal must first be installed on your phone. Signal for Windows; Signal for Linux - Debian-based distros. Download 1Password X. 1Password X is the best way to experience 1Password in your browser. It works everywhere you use Chrome, Firefox, or Brave, including on Linux or Chrome OS. Click here for movie. This animation shows the distance between the Apophis asteroid and Earth at the time of the asteroid's closest approach. The blue dots are the many man-made satellites that orbit our planet, and the pink represents the International Space Station.

OccultWatcher is one of the primary tools for IOTA observers interested in asteroid occultations. OccultWatcher filters the global list of asteroid occultation predictions to show the events passing near your site or region. In addition observers can declare their planned location for observing an event. This is our main tool for coordinating multiple observers for an event. OccultWatcher website

GrazPrep (free)

GrazPrep will generate maps and local circumstances for lunar grazing occultations. GrazPrep website

Software for Occultation Observations and Data Reduction:

IOTA_VideoCapture (free)

A simple program for capturing video with a windows PC (and an analog video capture device). To install IOTA_VideoCapture and the companion playback application, download the following zip file which contains the manual and install files: IOTA_VideoCapture (version 2.2). For more information on capturing occultation videos with a Windows PC, see this guide.

OccuRec (free)

A full featured program for capturing occultation video in Windows. More information here.

Astro Flash Timer for iPhone (free)

AstroFlashTimer provides precise timestamp flashes based on NTP timing from the camera LED for astronomical videos (primarily asteroidal occultation recordings). Just point the camera flash into the optical path of the video recording device and trigger the desired flash mode. The app will log the exact time of the video flash onto your iPhone. The timing information can then be sent from the iPhone by email or text for later analysis. It is available from the App Store. More information here.

Occult Flash Tag for Android (free)

Occult Flash Tag provides precise timestamp flashes from the camera LED for astronomical videos (primarily asteroidal occultation recordings). Just point the camera flash into the optical path of the video recording device and trigger the desired flash mode. The app will log the exact time of the video flash onto your Android device. The timing information can then be sent from the Android phone by email or text for later analysis. It is available on Google Play. More information here.

PyMovie (free)

PyMovie is an aperture photometry program for analyzing video files. PyMovie is implemented in Python and has been tested on both MacOS and Windows. Instructions and documentation can be found on the PyMovie page

Limovie (free)

Limovie is a light measurement tool for analyzing video files containing occultation observations. It runs on Windows (7, 8, 10) and is an essential tool for extracting light intensity curves from video recordings of stellar occultations. It may be downloaded here. More information on using LiMovie is posted at the Observations page.

Tangra (free)

Tangra 3 is a free open source corss-platform software for reducing astronomical video observations such as asteroid occultations and runs natively on Windows, Linux and Mac OSX. Tangra website.

Occular, ROTE, PYOTE (free)

Programs for deriving event times and likelihood from light curve data. OTE Page.

Additional Occultation related Software

More tools for analzying occultation observations may be found at this website.

A colossal asteroid equivalent to the size of three football grounds might collide with Earth over the course of upcoming decades, as predicted by astronomers. The asteroid ‘Apophis,’ having the size of 300 meters and named after the ‘God of Chaos,’ is seemingly appearing to be getting affected due to Sunlight as it peculiarly drifts away from its orbit.

It is expected that this asteroid will whizz past the Earth on April 13, 2029, when it would be easily visible from the naked eye. Following that, it will rush through the vicinity of the Earth’s communication satellites while it makes a close contact with our world, as revealed by observations made through Subaru Telescope.

According to a study conducted by astronomers of Hawai Institute University of Astronomy, it has been found that the path of asteroid Apophis might be getting affected under the influence of ‘Yarkovsky’ acceleration. Due to such effect, it becomes quite difficult for scientists to predict the path of the orbits of the asteroid and to arrive at a conclusion as to whether the asteroid will hit the planet or not.

Prior to the detection of Yarkovsky effect on Apophis asteroid – scientists ruled out the possibility of the heavenly body crashing into the Earth in the year 2068. But, it is being reported that the asteroid is drifting away by 170 meters per year from its orbit due to Yarkovsky effect. This is enough to substantiate the claim inferring towards the consequences of 2068 impact. The statement comes from Dave Tholen, who is co-author of the paper presented at the Division for Planetary Sciences of the American Astronomical. In the hindsight, it has further corroborated the fact that giant Apophis might hit the Earth in 2068.

Having said that, Yarkovsky acceleration occurs due to the phenomenon of the asteroids re-radiating their absorbed heat. It happens often that these asteroids go through non-uniform thermal radiation, which means some parts get heated-up more in comparison to the other parts. Further, in order to maintain its thermal equilibrium, the day-side portion of these asteroids absorb Sunlight while the night-side radiate this energy. In this process of radiation, a small thrust gets generated which can either accelerate or decelerate the asteroid on its course. Subsequently, this may lead to a significant change in the orbit of the asteroid.

It is now that the scientists are wary of asteroid Apophis colliding with the Earth due to Yarkovsky effect which can have an impact that can be equivalent to the explosion of 880 million of TNT. /how-to-open-photo-transfer-app-on-mac.html. In addition, it is also predicted that the destructive consequences after the collision could be 65,000 times more than that of Hiroshima Nuclear disaster. Besides that, astronomers, still believe that this asteroid may hit somewhere in Europe in 2068.

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