Set tonight's window and overheads — see how many subs actually fit before the sky closes.
Tonight's session
Session date & location
Defaults to tonight — set your location below, then it fills in Available time, which you can still edit
Calculating astronomical night…
Horizon
Minimum imageable altitude by direction — leave at 0° where your view is clear
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°
°
°
°
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All directions clear — set your own obstructions above and the Target card below will use them.
Target
Search by name or catalogue number — see tonight's visibility using the date, location & horizon above
Saved
Recent
Loading catalogue…
for anything without a catalogue number
Available time Auto
Auto-filled from the date & location above — narrows to your target's own window once you pick one below, or edit anytime to override
Dithering
Pause between every sub-frame — switch off on nights you skip it
sec
Meridian flip
Time to physically flip, any stop-before/resume-after pause, and the refocus after — switch off on nights you don't need one
sec
sec
min
min
Pause before + flip time + resume after + refocus after = time lost to each flip
Filters used tonight
Hα, SII, OIII, the Hα/OIII and SII/OIII combos, and LRGB are fixed filter names. The last 3 slots are yours to rename — for L-QUAD, an L-eNhance, or anything else you shoot. Target subs takes a count (40), a percentage (40%), or Auto to split what's left evenly.
✓Good for imaging tonight✕Moon will likely wash it out