Comets C/2017 O1 (ASASSN) & C/2015 ER61 (PANSTARRS)
Taken by José J. Chambó on September 17, 2017 @ Mayhill, New Mexico, USA
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Comet C/2017 O1 ASASSN, down left, is observable by binoculars now while approaching to perihelion showing a greenish coma of diatomic carbon and a small ionic tail. At same time comet C/2015 ER61 PANSTARRS, up right, moving away since four months ago and twice as far from Earth, can be still imaged with a long and narrow tail. Between both is glimpsed a shred of IFN (Integrated Flux Nebula) very near to Pleiades located next to field toward the top right.

Takahashi FSQ-106ED f/5.0 & SBIG STL-11000M (L:4×180s Bin1 + RGB:1x60s Bin2)
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