SQM Reader Pro
Readings Map
The map below shows the latest readings contributed by SQM Reader Pro users. Each marker shows the latest magnitude per square arcsecond (MPSAS) value reported for a meter installation, rounded down. Blue markers indicate readings taken with the moon below the horizon. Yellow markers indicate readings taken with the moon at or above the horizon.
Click on a marker to see details of the reading.
- Date & time of the latest reading reported for a meter installation.
- Latest MPSAS and theoretical naked-eye limiting magnitude (NELM) reported for a meter installation.
- Moon altitude and phase at the time of the latest reading for a meter installation.
- Mean (average) calculated for a population of 12 months of moonless MPSAS readings for the meter installation.
- Std Dev (standard deviation) calculated for a population of 12 months of moonless MPSAS readings for the meter installation.
Note that the map's location and zoom settings are saved in a cookie if your browser permits saving cookies.
| Total Meter Installations: | 285 |
| Total Readings: | 1912626 |
Latest Readings