Triton Occultation on 5 October 2017 Steve Conard

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Presentation transcript:

Triton Occultation on 5 October 2017 Steve Conard 10 September 2017 Triton Occultation on 5 October 2017 Steve Conard

Importance of This Event Triton has an atmosphere An occultation can tell us critical information about the atmosphere It has been many years since the last good data collection Highly desirable to have observers on centerline for the possible flash

Path Credit: Bruno Sicardy/Lucky-Star 2017 Predictions

Details 5 October 2017 23:51:46 UTC RA/Dec: 22h 54m 28s, -08d 51’ 08” Star mag 12.4, Triton mag 13.5 Separation from Neptune 11.4” Max duration 161 s Credit: Dave Herald Prediction

Issues for US Observers! Only visible from east coast Short time after sunset, still late twilight even for eastern-most observers Low elevation Full moon only 33° away Neptune only 11” away After effects of hurricane Irma Besides all these, what’s not to like?

Observing Groups SwRI is making an effort to observe from the centerline in northern Florida Eliot Young is leading this effort Unknown if they will offer any travel money to IOTA team members, but they could possibly bring extra telescopes MIT has a very organized effort https://hubble.mit.edu/ They currently list 8 fixed observatories in the US Per the IOTA agreement with Bruno Sicardy, we are obligated to share our data with his group They are working with SwRI

SwRI/UVa Plans 24” and 20” portable telescopes on centerline with one visible and one SWIR camera (2) UVa C-14’s with Hyperstars 3 fixed observatories in mid-Atlantic/New England Additionally, they will send ~6 Skywatcher 16” telescope systems to the area around the centerline They currently have ~16 observers from SwRI, not clear how much of IOTA’s help they need

IOTA Observers Near Centerline Name General Location Notes Ted Blank Orlando, FL Needs scope David & Joan Dunham Centerline Their 16” Skywatcher Bill Hanna TBD Paul Maley Jacksonville, FL Jacksonville Univ 12”? Aart Olsen South Georgia? Roger Venable Chester, GA His C-14

Other IOTA Observers Name General Location Notes Bob Auburger Towson University 16” Bart Billard Fredericksburg, VA 14” TBC Steve Conard TBD TBD with dichroic Kevin Green Connecticut Bruce & Dylan Holenstein Philadelphia Suburbs 20” with dichroic John Menke DC Suburbs 18”

Holenstein/Conard Equipment Bruce and I will both be using Bruce’s ONAGs to split visible and NIR Reflected leg <750 nm, transmitted >750 nm I plan on using QHY174’s on both legs

Images Collected Image by John Moore 8” RC @ f/4 with Watec 910 14” to Neptune Image by Steve Conard C-14 @f/11 with QHY174M-GPS 16” to Neptune

Other Notes UVa has imaged Neptune/Triton with a 14” SCT with Hyperstar (f/1.9) They reported that they were able to cleanly separate Triton from Neptune