C/2013 E2 (Iwamoto)?
Posted 16 September 2013 - 10:14 AM
This is the tagline for Iwamoto from www.cometchasing.skyhound.com
Yet even using the finder's chart and spending an hour tracking down exactly where it should be Saturday night (Sun morning) I couldn't find it. I was using my 18" Obsession with the 30mm ES82 (~70x), then the 18mm ES82 (~110x In case it was too small for the 30mm). I found the stars on the finder chart on either end of where it might be for that night and scanned back and forth to no avail.
Anyone seen Iwamoto?
Posted 16 September 2013 - 05:21 PM
Posted 16 September 2013 - 06:31 PM
Hopefully someone else can confirm or deny being able to find it... at least visually.
My skies aren't the darkest around, but they should be dark enough. Was frustrating not to even see a hint of it. There wasn't even a star out of place on the finder chart.
Posted 16 September 2013 - 07:09 PM
Posted 16 September 2013 - 08:09 PM
I did find Comet Lemmon that night, at 60x, and it was pretty darned dim from my green-sky site.
It showed quite a bit of movement over 3 hours at 203x.
Posted 17 September 2013 - 06:25 AM
Posted 17 September 2013 - 12:50 PM
For brightness, there is an estimate made initially that rarely gets updated and almost never in popular astronomy programs, it's used to predict future brightness months later. Recent MPC reports are far better, but one of the gotchas is Total Brightness, which is the same as galactic surface brightness, i.e. it's going to be dimmer. The last brightness in my database for Iwamoto is a 'T' at 15.9, with previous days at 15-16 for the Nucleus. Since the T and N brightness values are so close, I'd say there isn't much of a coma, making it a hard visual object.
Iwamoto has been seen nearly every day for the past month, so Horizons location and MPC brightness reports should successfully guide you. Comets on their way outbound are likely to split and fizzle, and of greater interest for final orbit determination, so they can be a show still.
Overall, nothing is much up since C/2011 L4 faded.
Posted 23 September 2013 - 12:58 AM
I plan on trying for it in October when it's dark enough again but I find Skyhound's estimates can often be optimistic.
Posted 25 September 2013 - 12:30 PM
Posted 26 September 2013 - 06:24 PM
At least I was happy that I got my first experience at really detailed star hopping!