NASA's Swift Mission has spied a comet slowdown

NASA’s Swift mission has spied a comet slowdown which orbits the planet every 5.4 years was rotating 3 times slower than it was in march when observed by Discovery Channel Telescope the comet 41P/Tuttle-Giacobini-Kresák which is just 0.9 mile(1.4 kilometers) had a rotating period of 20 hours but according to observations the rotating period had more than doubled 46 and 60 hours but why is the comet spinning slower ?

To find the reason we did some research and found the answer on NASA’s Website

As a comet nears the Sun, increased heating causes its surface ice to change directly to a gas, producing jets that launch dust particles and icy grains into space. This material forms an extended atmosphere, called a coma. Water in the coma quickly breaks up into hydrogen atoms and hydroxyl molecules when exposed to ultraviolet sunlight. Because Swift’s Ultraviolet/Optical Telescope (UVOT) is sensitive to UV light emitted by hydroxyl, it is ideally suited for measuring how comet activity levels evolve throughout the orbit.   

Tony Farnham, a principal research scientist at UMD. said “We suspect that the jets from the active areas are oriented in a favorable way to produce the torques that slowed 41P’s spin,” 

please note the blue coloured text has been taken from Nasa’s Website