The predicted times are predictions and may be in error by tens of seconds. Start observing aįew minutes before the event and observe for a few minutes after the event. (practicing on a previous evening is a good idea). The stars are often dim (mag 10 orĭimmer) so you should allow plenty of time to find the "target" star I have listed a few common methods in the following page:Īlso, you should note the latitude, longitude, and elevation of yourĪ couple of additional suggestions. Several methods for determining the duration and exact times of an event. The beginning and end of the event from their location (UT). Third, the observer can report the exact times of If the observer sees a positive event, they can report the duration of the If there was no change in the star'sīrightness during the predicted time, the observer reports a negative event.īoth negative and positive observations are valuable data. If the star dropped in magnitude during the predicted time, the observer First, the observer can report a negative or positive event. An observation can yield three types of usefulĭata. Occulted and monitor the star during the predicted time of an occultationįor your location. To observe an asteroid occultation you find the star which will be For most events, the uncertainty is largeĮnough that we must spread multiple observers across the predicted path toĮnsure a good chance of observing the event. Therefore, the likelihood of seeing anĪsteroid occultation from a location in the predicted path is different forĮach occultation event. Location depends on the uncertainty in the position of the star and the As a result, we can only make a statistical prediction of Stars is still relatively large compared to the size of anĪsteroid. Although new instrumentation has provided significantĪdvances in recent years, the positional uncertainty for both asteroids and Even the largest asteroids subtend smallĪngles on the sky. These events would be very hard to detect with amateur equipment.Īn asteroid occultation prediction predicts the path of theĪsteroid's shadow on the earth. These occultations involve small asteroids and relatively dim stars, and As asteroids move through the sky they o ft en p as s in f ro nt o f stars from the If the star is relatively bright compared to theĪsteroid, an observer will see a noticeable drop in magnitude as when theĪsteroid covers the star. Orbit, the asteroid may cover the star for a fraction of a second or close Size of the asteroid, its distance from the earth, and its speed in its Of the asteroid's shadow as it passes across the earth. And the term "shadow path" refers to the path Shadow" to refer to the "shadow" thrown by the asteroid with respect to the During an asteroid occultation "event" theĪsteroid momentarily hides the star. The term asteroid occultation for the situation where an asteroid occults a In a lunarĮclipse, the earth occults the sun for observers on the moon. Moon occults (covers) the sun for observers on the earth. Transits are common examples of occultations. One body "covers" or "passes in front of" another body. Occultation is a generic astronomical term for a situation where Miscellaneous information on equipment for.What does RUWE high mean? How about Duplicated Source Flag?.How does IOTA generate path predictions?.What if there is no update for an event in my.What is the field of view of the star chart.What do the red and blue lines mean on the more detailed road maps?.What is the information listed in the Event.Which asteroid occultations should I try to.How do I report an asteroid occultation.How do I observe an Asteroid Occultation?.What is an Asteroid Occultation Prediction?.
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