Try increasing gamma if dark sections aren't distinguished

Try increasing gamma if dark sections aren't distinguished

Saturday, September 28, 2024

super moon, tiny eclipse 9/17/24

Here’s a partially eclipsed supermoon rising on the evening of 9/17/24.  I happen to have 8 PM dinner reservations at beachcombers, so I headed down to a section of crystal cove with a nice view to the east a bit early to catch it.   

Partially eclipsed supermoon
9/17/24 7:17 PM

As a bonus, i caught a green flash at sunset (confirmed by 4 others), first i've ever seen from California.  sadly no pics.  I will note that as the sun was setting it seemed to be melting into the water at the bottom, suggesting the highly refractive conditions necessary for a green flash.  

a few more shots:

Partially eclipsed supermoon
9/17/24 7:19 PM

Partially eclipsed supermoon
9/17/24 7:19 PM

attempted a few composites combining long and short exposures:

Partially eclipsed supermoon
composite of long and short exposures
9/17/24 7:22 PM

Partially eclipsed supermoon
composite of long and short exposures
complete with crystal cove sign
9/17/24 7:24 PM

imaging details (most people should stop here):
Crystal Cove State Park Vista Point
9/17/24 7:17 to 7:24 PM
nikon D850
F-S DX NIKKOR 55-300mm f/4.5-5.6G ED VR
hand held, balanced on tripod--forgot connector :)
exposure details in order:
1/10 sec @f/9 ISO 1250 300 mm
1/25 sec @f/9 ISO 1250 300 mm
1/125 sec @f/9 ISO 1250 300 mm

for the composites, i tried to portray the visual experience by combining long and short exposures in photoshop, showing a bit of the night scape and the bright glow surrounding the moon while preserving the detail of the lunar surface.  I also stamped out some pesky street lights.  
1/2 sec @f/9 ISO 1250 155 mm


1/2 sec @f/9 ISO 1250 55 mm

30 sec video capture 1/1000 sec ISO 3200 30 fps @ 300 mm
stacked in autostakkert,
sharpened in registax











Sunday, September 8, 2024

Last weekend's loop de loop 9/1/2024 20:06 UTC

Last weekend (Sept 1st 2024) there was a large coronal mass ejection / flare off of the rim of the sun, followed by post flare loops that lasted for hours.  missed the flare, but caught the loops.  

Solar Prominence 2024 09 01 20:06 UTC

10 minute animation
Solar Prominence 2024 09 01
19:59 - 20:10 UTC

A few minutes on the little guy

Solar Prominence 2024 09 01

Image details:
Eastbluff, CA
2024 09 01
19:59 - 20:10 UTC
M class flare peaked at M5.57 south of AR3811 followed by persistent loops
Ha 
Lunt 60 PT B1200 
manual guiding with alt-azm mount
zwo ASI 290MM
20 second captures
FPS (avg.)=183
Shutter=2.163ms
Gain=351 (58%)
best 25% frames
autostakkert, registax, photoshop
aligned and manually de-rotated in photoshop

here's an autoalign in photoshop without derotation
Solar Prominence 2024 09 01
19:59 - 20:10 UTC

after tedious manual derotation/alignment
Solar Prominence 2024 09 01
19:59 - 20:10 UTC
manual alignment and de-rotation



Loop the loop


Wednesday, September 4, 2024

Delta Equulei is 60 light years away

 Equuleus (Latin for little horse) is a faint constellation near pegasus (hence the horse theme) rising in the east these nights.  

Constellation Equuleus
"little horse"
horse's head only

Delta Equulei, is the second brightest star in this constellation.  at magnitude 4.47, you'd need dark skies and/or binoculars to see it.


This star is 60 light years away.  

According to Einstein's theory of relativity, the speed of light is the same for all observers.  consider a spaceship moving away from the sun at half the speed of light.  light from the sun speeds by us at the speed of light and then speeds by the ship at the speed of light.  shouldn't it be half the speed of light relative to the ship? 

Speed = distance/time. so the solution is that time slows down on the ship relative to us, keeping the speed of light constant.  

Consider a photon leaving Delta Equulei 60 years ago.  Some of us have experienced 60 years waiting for its arrival tonight.  But the photon, traveling at the speed of light experienced no time at all.  

Something to think about on this day as time flies by.  

imaging details:
nikon D850
poor seeing 
F-S DX NIKKOR 55-300mm f/4.5-5.6G ED VR @ 55 mm F/4.5
20 sec, ISO 400
skywatcher star adventurer tracking mount
Eastbluff, CA
September, 2024
spikes added in processing

apologies for the recurrent theme