According to Space Weather, 2013 is likely to be a real year. year of comets. Comet Pan-STARRS will be visible unarmed eye in March, it will probably be followed by ISON’s Great Comet November. Now we have to add a green comet to this list. Lemmon (C / 2012 F6). 
Photos from open sources
Green Comet – Lemmon. “Comet Lemmon will give us great show for the southern hemisphere, “says John Drummond, who sent us a photo from Gisborne, New Zealand: “This image was taken on January 23 using 41 cm (16 inches) Meade reflector, “says Drummond.” This is the result of twenty shots with 1 minute exposure. “” It took a lot time to consider comet coma about 7-magnitude (“Coma” = gas cloud surrounding the comet’s nucleus). Green Color – Lemmon comes from the gases that make up her coma. Jets spew out comet nucleus cyanogen (CN: poisonous gas present in many comets) and diatomic carbon (C2). Both substances acquire green glow in the sun in a near cosmic vacuum. Discovered March 23, 2012 Mount Lemmon Observation Center (Mount Lemmon) in Arizona, Comet Lemmon is on an elliptical orbit with a period of almost 11,000 years. This is her first visit to the inside of the solar system for a very long time. The brightness of the comet will increase as it approaches the sun; can assume that its luminosity reaches 2 or 3 values, and she will be like stars in Ursa Major in late March, when it will approach the Sun about the same distance as Venus (0.7 AU). Northern Hemisphere Observers Receive First the opportunity to observe the comet in early April, until then it will target exclusively to astronomers from the south hemisphere.
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