2 citations · 4 across the 14 of their papers we have counts for
5 papers · 1 filter
Brightness of the Qianfan Satellites
Anthony Mallama, Richard E. Cole, Bram Dorreman +2
Observed magnitudes of Qianfan spacecraft range from 4 when they are near zenith to 8 when low in the sky. Nearly all of the observations can be modeled with a nadir-facing flat an…
BlueWalker 3 Redux
Anthony Mallama, Richard E. Cole, Scott Harrington +4
The BlueWalker 3 satellite is now fainter than during the first months after deployment. The greatest improvement is that the average maximum luminosity near zenith has been reduce…
Brightness Characterization for Starlink Direct-to-Cell Satellites
Anthony Mallama, Richard E. Cole, Scott Harrington +1
The mean apparent magnitude of Starlink Mini Direct-To-Cell (DTC) satellites is 4.62 while the mean of magnitudes adjusted to a uniform distance of 1000 km is 5.50. DTCs average 4.…
Predicted Brightness of Starlink Internet Satellites at 350 km
Anthony Mallama
SpaceX recently proposed to orbit 19,440 Starlink internet satellites at a low altitude of 350 km instead of the current 550 km. The distribution in the sky and the apparent magnit…
Extreme Flaring of Starlink Satellites
Anthony Mallama, Richard E. Cole
Starlink satellites can become extremely bright when sunlight reflects specularly to an observer on the ground. The observed brightness of such flares is consistent with a bidirect…