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The A symbol issue is something to do with displaying the file contents in a Browser window. If I save the file and then open it, it formats just fine.
Clear skies,
Greg
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2022-01-13, 08:56 PM
(This post was last modified: 2022-01-13, 08:57 PM by theskyhound.)
(2022-01-13, 08:21 PM)bigmasterdrago Wrote: Sorry by broken I mean for a few hours over several day. Not as one continuous set of hours. I took the ephemeris to a copy to the clipboard and then opened it in Notepad ++. Did the needed edits and then saved for attaching to the post.
Not printing to a file. Copy/paste and then into an editor. Seemed to work fine that way to drop all the hours I did not want (when below horizon, etc).
This is what the filters are for. Set if for Fair Quality, or maybe better in this case, "Visible (at any difficulty)."
Clear skies,
Greg
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Which program did you use to create the 2.04 kB file? The column headers are different that the ST4 ephemeris.
Phil S.
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That one from Word looks fine. Maybe Notepad is doing something.
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I've made some discoveries while looking over the ephemerides. Although this rock is large and not especially close to the Earth/Moon system, there does appear to be a small amount of gravitational perturbation. The orbit and positions do get a slight bit of tweaking as it makes its pass. Compared with those at Horizons, they can be off by as much as 3 arc minutes on prime night (Jan. 18th). Although the rock is very bright and should be picked up as an interloper in large binoculars, it may behoove one to run the position ephemeris using osculating elements just prior to hunting it down. YMMV.
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Without using osculating elements, 1994 PC1 is plotted about 2.5' out of position compared with observations last night from several stations in SE Texas. Not a biggie for this bright rock, but if your skies are marginal, make sure to use a fresh set of osculating elements. Not the default elements from the MPCORB. Last night, I had trouble centering the initial FOV due to my south sky having a good bit of light pollution from Conroe and Houston. Once the field was located, I had no issues following the big rock.
Tonight I plan on doing mag estimates since it passes thru a large field of similar magnitude stars.
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Hi BMD,
How closely is it following the original prediction? I downloaded the MPC's 'NEAs at Today Epoch' elements this morning, but haven't compared the positions to those that were computed at the start of this thread. Do the elements from MPC agree with what you're getting from HORIZONS?
This NEO should remain brighter than mag 15 until Jan 25 when it will be in northern Cygnus. It will slow quite a bit though. Only ~3'/min. There are several more big ones coming next month.
Phil S.