By Hassan Dadashi Arani | 2025-08-01
ISS and TIANGONG "over" Achada do Gamo.
On 07/28/2025 10:10 pm by JOSE ZARCOS PALMA | Website | Mina São Domingos - Portugal
During Nautical twilight, the two space stations—ISS and TIANGONG—cross the same region of the sky just a few minutes apart.
Moving from west to east (right to left), they will disappear in the regions of the constellations Scorpius and Sagittarius.
The ISS's visibility window was between 9:43 PM and 9:49 PM, with a maximum elevation of 39.4°, and a few minutes later, between 10:02 PM and 10:07 PM, Tiangong appeared just above the ISS's previous trajectory, with a maximum elevation of 54.4°.
On the right side of the image, we can also see the Moon's trail, with an illumination of ~18%, towards the horizon where it will disappear. The apparent motion of the stars and the Moon correspond to the period between the beginning of the ISS's ascent and the end of Tiangong's visibility (~24 minutes).
In the foreground, the landscape heavily contaminated with ashes and sulfured mud from the former Achada do Gamo chemical-metallurgical complex.
The lights on the horizon in the center of the image are from the village of Santana de Cambas.
Camera Sony A7IV
Lens Samyang 8mm fisheye
Sky - F2.8 , ISO100 , 15"
Foreground - 1 image 30" - ISO 3200
Images of sky stacked and blended with foreground in Photoshop.