NASA Study Using Keck Telescope Hints at Possible Change in Water 'Fingerprint' of Comet
Astronomers from NASA's Goddard Space Flight Center in Greenbelt, Maryland, observed the Oort cloud comet C/2014 Q2, also called Lovejoy, when it passed near Earth in early 2015. Through NASA's partnership in the W. M. Keck Observatory on Mauna Kea, Hawaii, the team observed the comet at infrared wavelengths a few days after Lovejoy passed its perihelion - or closest point to the sun. Scientists from NASA's Goddard Center for Astrobiology observed the comet C/2014 Q2 - also called Lovejoy - and made simultaneous measurements of the output of H2O and HDO, a variant form of water. This image of Lovejoy was taken on Feb. 4, 2015 - the same day the team made their observations and just a few days after the comet passed its perihelion, or closest point to the sun. Read more
C/2014 Q2 (Lovejoy) is a long-period comet discovered on 17 August 2014 by Terry Lovejoy using a 0.2-meter (8 in) Schmidt-Cassegrain telescope. Read more