COMET LOVEJOY (C/2017 E4) Taken by Yasushi Aoshima on April 1, 2017 @ Ishikawa, JAPAN

A thin, faint tail extended to M15. The length was about 4°. You may find a small, blue planetary nebula NGC7094 on the left of the tail.
Data: EF300mmF2.8L USM, CanonEOS6D, 12800 ISO, 50x30sec stacked (18:39-19:07 UT), FOV: 4.5 x 7°, North: upper left 35° *)The lower right star is ε Peg.