21/10/2024
OBJECT DETECTED AT 415 KM OVER SEGUIN, TX, LAST NIGHT
Do any of you have contacts at NASA's Mission Control?
At 19:24:53 the evening of 20 Oct 2024, my best twilight photometer detected a moderately large object at an altitude over my Texas site of 415 km. The International Space Station orbits at about 400 km, so I have tried to report my finding to NASA. However, as I learned in 2021 when I detected the breakup of Kosmos 1408, I have been unable to contact the ISS Mission Control team in Houston. Various radar systems keep tract of objects that might fly across the ISS orbit. Nevertheless, it seems good that they be informed about other sightings.
Here is my 2021 report that I was unable to send to NASA:
MEASURMENT SITE: Geronimo Creek Atmospheric Monitoring Station at 29.6 N 97.9W (near Seguin, TX).
16 NOV 2021: My 200 dB twilight photometer detected a significant aerosol layer from 375 km to 525 km, with a peak between 425 km to 450 km. The event was detected from 19:03:51 CST to 19:19:18 CST.
17 NOV 2021: The photometer indicated a breakup of the debris field into 12 layers, from 231 km to 510 km. The layers closest to the ISS altitude were at 390 km and 410 km. There might be a few much higher and much lower layers at 600 km and 235 km. I will need to check these for starlight interference. Let me know if you would like to see the profile.
18 NOV 2021: Cloud cover will probably block measurements tonight.
INSTRUMENT: The photometer employs an LED with peak spectral response at 870 nm (outside nearby water v***r bands) directly coupled to a 200 dB log converter and a 16-bit logger. There are no optics, and the field of view is about 1.5 degrees (FWHM), about the separation of the closest 2 stars in Orion's belt.