Comet C/2018 Y1 (Iwamoto)

Here's a finder chart for C/2018 Y1 (Iwamoto) from Sky & Telescope for mid-January through mid-February, 2019, tick marks at 0 hr UT. It's from Bob King's article, Comets to Catch in 2019.

 

 

Comet C/2018 Y1 (Iwamoto)
January 15, 2019, 0500 EST

 

Screen capture of C/2018 Y1 (Iwamoto) from SkyTools. The comet is 4.7 north of Pi Hydrae. The dashed line represents the boundary between Virgo and Hydra. The dashed circle represents the field of a 30 mm 82 eyepiece in a 12.5-inch, f/5 reflector (= 53x, 1.55 TFOV).

Iwamoto was not seen visually on January 15 (using an 85 mm spotting scope at 60x), but it was visible on a snapshot taken at 4:34 am EST. The sky did not seem as dark as I had expected/hoped, probably due to the layer of relatively fresh snow on the field (perhaps an inch or two). 

The image below was captured on January 15 at 4:34 am EST with a Canon 6D and a Cannon 200 mm f/2.8L lens, 4 seconds at f/2.8, ISO 6400, 4000 K white balance (it's a significant crop from the same image on my home page). It covers roughly the same area as the SkyTools finder chart above in a field about 1.9 square. Mouseover for labels. 

 

 

 

 

Comet C/2018 Y1 (Iwamoto)
January 12, 2019, 0500 EST

Screen capture of C/2018 Y1 (Iwamoto) from SkyTools. The comet is 4 north of Pi Hydrae. The dashed line represents the boundary between Virgo and Hydra. The dashed circle represents the field of a 30 mm 82 eyepiece in a 12.5-inch, f/5 reflector (= 53x, 1.55 TFOV).

 C/2018 Y1 (Iwamoto) was spotted for the first time by me, Joe Stieber, on 12-Jan-2019 at 4:45 am EDT from Carranza Field in Wharton State Forest, NJ, with an 85 mm spotting scope, best seen at the maximum 60x. It was at the threshold of visibility and was not seen with 15x56 binoculars.

 

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