by Chris Peterson » Fri Dec 10, 2021 6:08 pm
neufer wrote: ↑Fri Dec 10, 2021 4:31 pm
Chris Peterson wrote: ↑Fri Dec 10, 2021 4:11 pm
Randall Rathbun wrote: ↑Fri Dec 10, 2021 10:34 am
What planet us that at the 4:30 position? Venus?
It is possible, depending on how the image was constructed (for instance, when in the sequence the landscape image was collected). Its location with respect to the ecliptic is just about right. Venus was lagging the Sun by about 40°, with the images taken every 15° (you can see Venus over the hills in the linked video). Most of the possible images of Venus are likely to be hidden by the glare of the Sun in later images. If we could see the 24 individual frames unstacked, we'd likely see Venus in most or all of the images.
We'd likely see Venus in most or all of the images
with the Sun fully shining :?:
https://www.fourmilab.ch/cgi-bin/Yoursky wrote:
Code: Select all
[UT 7:34:38] From 76°48'S 46°12'W:
---------------------------------------
Altitude Azimuth
.......................................
Sun 17.246° −65.514°
Moon 18.217° −65.507°
Venus 12.226° −24.372°
Here is a stacked set of 24 hourly images (the eclipse happens in the SE). As you can see, Venus is very close to the Sun in every image.
_
Here is an animation of the same data. The system seems to butcher animated GIFs when it shrinks them. Ignore that and just click on the image to get the full sized version, which seems to look fine in my browser.
_
I'd say the dot in the APOD could easily be Venus, captured when the landscape layer was obtained. No way to know for sure, though, without seeing the individual frames. I also note that the dot is in almost exactly the position of Venus during totality, and given that the totality frame was a longer exposure than the rest, it makes sense that's the one where Venus would be most apparent.
[quote=neufer post_id=318955 time=1639153871 user_id=124483]
[quote="Chris Peterson" post_id=318954 time=1639152672 user_id=117706]
[quote="Randall Rathbun" post_id=318945 time=1639132494]
What planet us that at the 4:30 position? Venus?[/quote]
It is possible, depending on how the image was constructed (for instance, when in the sequence the landscape image was collected). Its location with respect to the ecliptic is just about right. Venus was lagging the Sun by about 40°, with the images taken every 15° (you can see Venus over the hills in the linked video). Most of the possible images of Venus are likely to be hidden by the glare of the Sun in later images. If we could see the 24 individual frames unstacked, we'd likely see Venus in most or all of the images.[/quote]
We'd likely see Venus in most or all of the images [b][u][color=#FF0000]with the Sun fully shining[/color][/u][/b] :?:
[quote=https://www.fourmilab.ch/cgi-bin/Yoursky]
[code][UT 7:34:38] From 76°48'S 46°12'W:
---------------------------------------
Altitude Azimuth
.......................................
Sun 17.246° −65.514°
Moon 18.217° −65.507°
Venus 12.226° −24.372°[/code][/quote]
[/quote]
Here is a stacked set of 24 hourly images (the eclipse happens in the SE). As you can see, Venus is very close to the Sun in every image.
_
[attachment=0]Eclipse-Day-Sim.jpg[/attachment]
Here is an animation of the same data. The system seems to butcher animated GIFs when it shrinks them. Ignore that and just click on the image to get the full sized version, which seems to look fine in my browser.
_
[attachment=1]Eclipse-Day-Sim.gif[/attachment]
I'd say the dot in the APOD could easily be Venus, captured when the landscape layer was obtained. No way to know for sure, though, without seeing the individual frames. I also note that the dot is in almost exactly the position of Venus during totality, and given that the totality frame was a longer exposure than the rest, it makes sense that's the one where Venus would be most apparent.