Astronomical Calendar 2011
January February March April May June July August September October November December
|Quadrantid meteor shower||3-4 Jan 2011|
Quadrantid meteor shower will be peaked on 3rd and 4th January but it will be visible on 1-5 January 2011. One can see upto 40 meteors per hour during peak. Meteors seems to radiate from the constellation Bootes, close to the North Star. In 1932, the Quadrantid meteor shower showed maximum activity with 80 meteors per hour.
|Lyrid meteor shower||21-22 Apr 2011 |
Lyrid is a medium intensity meteor shower. It usually produces about 20 meteors per hour in its peak. The shower will peak on 21-22 April but some meteors will be visible between 16 to 25th April. Meteors seems to radiate from the constellation Lyra.
|Eta Aquarid meteor shower||5-6 May 2011 |
Eta Aquarid is a low intensity meteor shower. It usually produces about 10 meteors per hour in its peak. The shower will peak on 5-6 May. Meteors seems to radiate from the constellation Aquarius.
|Perseid meteor shower||12-13th Aug 2011 |
Perseids are one of the strong meteor showers. It produce up to 60 meteors per hour at peak hours. Radiant point of this shower is in the constellation Perseus. These meteors originate from the tail of comet Swift-Tuttle.
|Orionid meteor shower||21-22 Oct 2011 |
Orionid is a medium intensity meteor shower and one can see about 25 meteors per hour.
|Leonids meteor shower||17-18th Nov 2011 |
Annual event of Leonid meteor shower can be seen on 16-17th November. Leonid meteor shower is visible towards the constellation Leo, the Lion. During Leonid meteor shower, Earth will pass through a stream of debris which is left behind by comet Tempel-Tuttle.
|Geminids meteor shower||13-14th Dec 2011 |
Geminids meteor shower is a strong meteor shower. Annual event of Geminids meteor shower take place on 13-14th December but some meteors will be visible between 6 to 19th December. For many observers, geminid is the best meteor shower. It can produce 60-80 meteors per hour at its peak.
|Ursids meteor shower||22-23 Dec 2011 |
Ursids meteor shower is a medium intensity meteor shower. Ursids meteor shower peaks on 22-23 December. It usually produces 5-10 meteors per hour but occasionally it can produce about 100 meteors per hour.
Aphelion: Farthest position of a planet from the Sun.
Perihelion: Closest position of a planet from the Sun.
Apogee: the position of the Moon farthest from Earth.
Perigee: the position of the Moon closest from Earth.
Superior Conjunction: Venus or Mercury is on the opposite side of the Sun from Earth.
Inferior Conjunction: Venus or Mercury is between the Earth and Sun.
Greatest elongation: elongation is the angle between the Sun and a planet as seen from Earth, during eastern elongation, the planet appears as an evening star, during western elongation, the planet appears as a morning star.
Opposition: position in the orbit of a planet when opposites the Sun as seen from Earth.
Conjunction: position in the orbit of a planet when appears closer to the Sun as seen from Earth.
Occultation: Moon occults or eclipses a planet or a star.