25 Days Old Moon (astropical)

Contains: Solar system body or event

25 Days Old Moon

Acquisition type: Lucky imaging

25 Days Old Moon

Acquisition type: Lucky imaging

Finally, the hot and humid summer is over. No more wet tropical nights - quite comfortable, not so the mossies. Well, they are feeling most comfortable -- with my blood -- these little gourmets.

Just like me, ravens too were engaged in target shooting dropping their feast of the day. Less atmosphere is their advantage, but my tactical advantage is a Newtonian with small aperture and a moon at low elevation.

Starting the session at 4:30 in the morning and ending an hour later with dusk, the 25 days old moon was merely between 28° and 40° above horizon accordingly with strong turbulences but with good final stacking results thanks to infrared filtering. All images in the revision are captured with an with ASI290MM through an IR742nm pass filter, 600 frames, 1.5x drizzled, mono-8, 12-bit ADC (high speed OFF). The lunar sickle sports a strong brightness contrast between limb and terminator, in that I intentionally used shorter exposure times to avoid saturation at maximum frame rate and compensated for the dark images during processing.

B

Description: Full moon disk: FL=750mm, 8ms, gain 200, 83fps, 3-panel mosaic

Uploaded: ...

C

Description: Aristarchus: FL=1500mm, 17ms, gain 200, 59fps

Uploaded: ...

D

Description: Schickard: FL=1500mm, 17ms, gain 200, 58fps

Uploaded: ...

E

Description: Grimaldi: FL=1500mm, 12ms, gain 200, 83fps

Uploaded: ...

F

Description: Schickard: FL=1500mm, 18ms, gain 220, 55fps

Uploaded: ...

G

Description: Aristarchus: FL=1500mm, 20ms, gain 220, 49fps

Uploaded: ...

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The “AstroBin Image of the Day and Top Picks”, or IOTD/TP, is a long-running system to promote beautiful, interesting, peculiar, or otherwise amazing astrophotographs, with a focus on technical excellence. Learn more.

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25 Days Old Moon

25 Days Old Moon

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25 Days Old Moon

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