Calculating the Magnitude of the ISS from photo

[Moon_1975]

Hi All,

I have a photo of the ISS and i wanted to calculate its absolute magnitude.

I've found the pixel value for a point on ISS and i have also found the pixel value for an identified star in the background.

How would I calculate the ISS absolute magnitude and apparent magnitude from the pixel values. I have the apparent/absolute mag of the known star.


D

 

[Quick_Nick]

Hi All,

I have a photo of the ISS and i wanted to calculate its absolute magnitude.

I've found the pixel value for a point on ISS and i have also found the pixel value for an identified star in the background.

How would I calculate the ISS absolute magnitude and apparent magnitude from the pixel values. I have the apparent/absolute mag of the known star.


D

I believe that an apparent magnitude difference of 5 equals a brightness difference of 100x (the scale is logarithmic), but that's the limit of my knowledge