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TOPIC: Geminid meteor shower


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The Geminids
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The Geminid meteor shower peaks at ~03:00 UT, 14th December 2017



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Geminid Stream
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Title: Meteoroid Orbits from Video Meteors. The Case of the Geminid Stream
Author: Maria Hajdukova Jr., Pavel Koten, Leonard Kornos, Juraj Toth

We use the Slovak and Czech video meteor observations, as well as video meteoroid orbits collected in the CAMS, SonotaCo, EDMOND and DMS catalogues, for an analysis of the distribution of meteoroid orbits within the stream of the Geminids and of the dispersion of their radiants. We concentrate on the influence of the measurement errors on the precision of the orbits obtained from the video networks that are based on various meteor-detection software packages and various meteor orbital element softwares. The observed orbital dispersions in the Geminid stream described by the median absolute deviation range from 0.029 to 0.042 1/AU for the video catalogues. The distribution of the semi-major axes of video meteors in all the databases, except for the Ondrejov (Czech) data, seem to be systematically biased in comparison with the photographic and radio meteors. The determined velocities of the video data are underestimated, probably as a consequence of the methods used for the positional and velocity measurements. The largest shift is observed in the EDMOND and SonotaCo catalogues. Except for the measurement errors which influence the analyses and their interpretations, we also point out the problem of the uncertainties of the numerical integration procedures that influence the simulations' results. Several experimental integrations of the Geminids parent asteroid, which we performed from the present to the past and then back to the year 2015, showed that a complete reproduction, including also the mean anomaly, is only possible for a time span of about 2700 years.

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Geminids
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Geminid Meteor Shower peak is at 21:00 UT, 13th December 2016



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RE: Geminid meteor shower
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Star Gazing: Geminid Meteor shower awes spectators in China

Spoiler



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Geminids meteor peak predicted for 15:00 UT, 14th December 2015.

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A Good Year To View The Geminid Meteor Shower

This year's Geminid meteor display, the best of the annual meteor showers, will be visible from approximately the 7th to 17th December, peaking on the evening of the 14th. The meteors, or 'shooting stars', which are best seen any time from late evening onwards, emanate from an area of the sky known as the 'radiant', which lies in the winter constellation Gemini (the 'twins'). This rises after sunset and remains above the horizon all night. For those who have never seen a meteor, this year provides one of the best opportunities, as there will no interfering moonlight.
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Title: Video Observation of Geminid 2010 from India using a portable system
Author: Chintamani Pai, Ankush Bhaskar, Virendra Yadav, R. D. Tewari, A. M. Narsale

Visual observations of meteor showers have been carried out for many decades by astronomers. Modern developments in imaging systems have advanced our knowledge about the shower dynamics and their origin. We have made an attempt to make a portable video recording system to observe meteor showers. The system consists of a camera capable of recording the rapid motion of meteors entering the Earths atmosphere. The camera is interfaced with a laptop using an open source software like VirtualDub. The initial testing was carried out while observing Geminid meteor shower in December, 2010 from the base of Mahuli fort (Lat: 19.47deg N, Long: 73.26deg E) near Asangaon, India. Here, we present few of the meteors recorded during this event, followed by a preliminary analysis of the shower. The portable video recording system enables to capture meteors at a remote location. This system will strengthen traditional visual observation methods used by astronomers in India. Future coordinated studies with a multi-station approach using such systems will assist in deriving the parameters associated with meteor shower activity and its impact on the Earth's atmosphere. Therefore, we propose long term and simultaneous multi-station video observations in the Indian subcontinent for continuous monitoring and better understanding of meteor dynamics.

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Geminids Meteor Shower peak at ~03:00 UT, 14th December, 2013.

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Geminids Meteor Shower peak at ~21:00 UT, 13th December, 2012.

ZHR: 88.0 á
Velocity: 36.2km/sá

Radiant: áRA=7.5h/113░ áDec=32.5░á



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Rock Comet Meteor Shower

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The Geminid meteor shower peaks on Dec. 13th and 14th when Earth runs through a stream of debris from a strange object that some astronomers are calling a "rock comet."



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