by Joe Stieber » Sat Dec 23, 2017 9:25 pm
I'm generally dissatisfied when the APOD doesn't provide any specific information about the date and time of a picture, especially for a transient object such as (3200) Phaethon, or any information about the size or specific location of the field-of-view being presented. Furthermore, I couldn't find a link in the text that went to a photographer's page which elaborated on the background information. So, I looked at Phaethon's path in SkyTools for an observer in Tokyo, Japan, and by matching the star field, I found the picture corresponded with the following...
It was taken about 1:30 am local time on December 14, 2017 (16:30 UT on December 13, 2017). Phaethon would be moving from left to right as seen here. The bright star just left of center near the top of the frame is 36 Persei, magnitude 5.3. Celestial north is slightly left of being directly up and the frame is very close to 3°wide x 2°high. If not cropped, that would represent an approximate 685 mm focal length with a "full frame" DSLR or a 425 mm focal length with an APS-C DSLR (of course, it could have been some other type of camera).
The meteor tracks do indeed lead back to Gemini, about 45°off to the left in this view.
I'm generally dissatisfied when the APOD doesn't provide any specific information about the date and time of a picture, especially for a transient object such as (3200) Phaethon, or any information about the size or specific location of the field-of-view being presented. Furthermore, I couldn't find a link in the text that went to a photographer's page which elaborated on the background information. So, I looked at Phaethon's path in SkyTools for an observer in Tokyo, Japan, and by matching the star field, I found the picture corresponded with the following...
It was taken about 1:30 am local time on December 14, 2017 (16:30 UT on December 13, 2017). Phaethon would be moving from left to right as seen here. The bright star just left of center near the top of the frame is 36 Persei, magnitude 5.3. Celestial north is slightly left of being directly up and the frame is very close to 3°wide x 2°high. If not cropped, that would represent an approximate 685 mm focal length with a "full frame" DSLR or a 425 mm focal length with an APS-C DSLR (of course, it could have been some other type of camera).
The meteor tracks do indeed lead back to Gemini, about 45°off to the left in this view.