HIGHLAND ROAD PARK OBSERVATORY SKY QUALITY MEASUREMENTS
| Date | Reading 1 Time | Reading 1 | Reading 2 Time | Reading 2 | Reading 3 Time | Reading 3 | MEAN |
| 2/16/2026 | 8:51pm | 18.38 | 8:53pm | 18.38 | 8:55pm | 18.42 | 18.39 |
| 1/19/2026 | 9:17pm | 18.49 | 9:19pm | 18.39 | 9:21pm | 18.32 | 18.40 |
| 11/19/2025 | 8:39pm | 18.41 | 8:41pm | 18.21 | 8:43pm | 18.26 | 18.29 |
| 3/25/2025 | 9:02pm | 18.50 | 9:04pm | 18.34 | 9:06pm | 18.45 | 18.43 |
| 9/30/2024 | 10:37pm | 18.60 | 10:39pm | 18.65 | 10:41pm | 18.57 | 18.61 |
| 3/22/2023 | 11:01pm | 18.70 | 11:03pm | 18.60 | 11:05pm | 18.59 | 18.63 |
Rough descriptions of skies corresponding to different SQM results are available at <cleardarksky.com>.
All measurements are taken on nights with few or no clouds visible. All measurements taken when the Moon was at least one degree below the horizon. All measurements were taken when the Sun was at least eighteen degrees below the horizon.
Unihedron Serial Number 7600.
NOAA AND DANKO VALUES
16 February 2026 = fair, 87% humid, SE 13 km/hr, T4S3
19 January 2026 = fair, 4°C, 79% humid, N 5 km/hr, T4S3
19 November 2025 = fair, 84% humid, wind E 6 mph, T3S3
25 March 2025 = fair, 21°C, 73% humid, wind calm, T3S3
30 September 2024 = fair, 24°C, 79% humid, wind calm, T5S3
22 March 2023 = fair, 22°C, 76% humid, wind S 8mph, T3S3