3 citations · 9 across the 11 of their papers we have counts for
11 papers
Initial Observations of the First BlueBird Spacecraft and a Model of Their Brightness
Richard E. Cole, Anthony Mallama, Scott Harrington +1
Based on a large set of visual observations, the mean apparent magnitude of BlueBird satellites is 3.44, while the mean of magnitudes adjusted to a uniform distance of 1000 km is 3…
Characterization of Starlink Direct-to-Cell Satellites In Brightness Mitigation Mode
Anthony Mallama, Richard E. Cole, Jay Respler +1
The mean apparent magnitude of Starlink Mini Direct-To-Cell (DTC) satellites observed in brightness mitigation mode is 5.16, while the mean of magnitudes adjusted to a uniform dist…
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.…
The Brightness of Starlink Mini Satellites During Orbit-Raising
Anthony Mallama, Richard E. Cole, Jay Respler +3
Observations of Starlink V2 Mini satellites during orbit-raising suggest that SpaceX applies brightness mitigation when they reach a height of 357 km. The mean apparent magnitudes…
Starlink Mini Satellite Brightness Distributions Across the Sky
Anthony Mallama, Richard E. Cole, Jay Respler +3
The illumination phase functions for Starlink Mini satellites are determined for times of twilight and darkness. Those functions are then evaluated to give apparent magnitudes over…
Assessment of Brightness Mitigation Practices for Starlink Satellites
Anthony Mallama, Andreas Hornig, Richard E. Cole +4
Photometric characteristics for all models of Starlink satellites launched to date are reviewed. The Original design that lacked brightness mitigation is the most luminous. SpaceX…
Starlink Generation 2 Mini Satellites: Photometric Characterization
Anthony Mallama, Richard E. Cole, Scott Harrington +4
Starlink Generation 2 Mini satellites are fainter than Gen 1 spacecraft despite their larger size. The mean of apparent magnitudes for satellites in brightness mitigation mode is 7…
BlueWalker 3 Satellite Brightness Characterized and Modeled
Anthony Mallama, Richard E. Cole, Scott Tilley +2
The BlueWalker 3 (BW3) satellite was folded into a compact object when launched on 2022 September 11. The spacecraft's apparent visual magnitude initially ranged from about 4 to 8.…
Visual Magnitude of the BlueWalker 3 Satellite
Anthony Mallama, Richard E. Cole, Scott Harrington +1
Observations have been carried out in order to assess the optical characteristics of the BlueWalker 3 spacecraft which is the prototype for a new satellite constellation. The illum…