Michael A. Covington    Michael A. Covington, Ph.D.
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Comet C/2022 E3 (ZTF)
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Comet C/2022 E3 (ZTF)


Given our dodgy weather, this may be the best picture of Comet ZTF that I get. (The comet is now receding.) This is a stack of twenty 1-minute exposures, aligned on the comet, which was moving, so the stars are streaks. Nikon D5500 (H-alpha modified, not that it matters) at ISO 200, Askar 200-mm f/4 lens wide open, AVX mount with PEC, no guiding corrections.

Is this a "rare green comet streaking across the sky"? You tell me. I think it's the same color as most comets. But the press has gone wild with it. Their latest conceit is that the comet is "over" particular cities at particular times ("Comet to pass over Houston on February 4" or the like). That's not how any of this works...


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