Richmond Hill Stargazing & Astronomy Report
Light pollution and stargazing locations near Richmond Hill
- City
- Richmond Hill
- Country
- Canada
- Latitude
- 43.8828
- Longitude
- -79.4403
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 18.07
- Bortle class
- Class 8 (Class 8)
- Darkness Quotient
- 24%
- Dataset
- July 2026
City sky
Richmond Hill: The Practical Verdict
Richmond Hill in Ontario is a small city with a suburban character, lying in the shadow of Toronto to the south. The overall light pollution is high, with the sky quality classified as poor for astronomical observations. Observing conditions are dominated by urban glare, severely limiting the visibility of the night sky.
From this location, the Milky Way is entirely obscured by the bright sky, making it impossible to view. The most practical targets for observation here include the Moon, planets, and bright stars. Narrowband imaging may still be conducted, albeit with caution. Avoid attempting visual deep-sky observations or trying to capture broadband galaxies, as these are heavily compromised.
While options for improved stargazing are limited, heading around 50 km north-north-east could offer a modest upgrade in viewing quality. Still, conditions remain fairly challenging due to the residual light pollution from the city.
At a Glance
- Overall
- Poor city sky - This is a poor city sky. The Milky Way is not visible and most deep-sky observing is unrealistic from the location itself.
- Milky Way
- Not visible - The Milky Way is erased by the bright urban sky background.
- Best targets from here
- Moon, planets, bright stars, double stars, solar system events, narrowband imaging only with care
- Do not prioritise
- visual deep-sky observing, broadband galaxies, reflection nebulae, widefield Milky Way
- Limited nearby upgrade
- 52 km NNE is the strongest nearby option but remains Bortle 5; the improvement is real but modest.
- Good dark window
- Richmond Hill's longest dark windows fall in December and January, with the shortest nights around June and July. Plan deep-sky sessions around the autumn and winter months for the best combination of long nights and true astronomical darkness.
Frequently Asked Questions
Can you see the Milky Way from Richmond Hill?
No. Richmond Hill is a Bortle Class 8 sky with SQM 18.07, so the Milky Way is not visible from the city. For Milky Way photography, look for a Bortle 4 or darker site.
What Bortle class is Richmond Hill?
Richmond Hill is Bortle Class 8 (SQM 18.07), a poor city sky for astronomy.
Is Richmond Hill good for stargazing?
Not for serious deep-sky observing. Richmond Hill is a poor city sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Richmond Hill good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Richmond Hill and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Richmond Hill without careful processing.
What can you observe from Richmond Hill?
Primary targets from Richmond Hill include Moon, planets, bright stars, double stars, solar system events. Targets such as visual deep-sky observing, broadband galaxies, reflection nebulae are not realistic from this sky.
Where are darker skies near Richmond Hill?
The closest meaningfully darker mapped site is 27 km NE, about 27 km north east of Richmond Hill, reaching Bortle 6.
When is the sky darkest in Richmond Hill?
The sky over Richmond Hill is darkest around January, December.
Is light pollution in Richmond Hill getting better or worse?
There is not yet enough long-term data to give a confident trend for Richmond Hill.
north - marginal
A diffuse glow sits on the north horizon. Faint objects below 20 degrees in this direction are compromised.
north-north-east - fair
Light glow detectable on the north-north-east horizon. The effect fades quickly with elevation and does not affect overhead work.
north-east - fair
Light glow detectable on the north-east horizon. The effect fades quickly with elevation and does not affect overhead work.
east-north-east - fair
Faint glow on the east-north-east horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
east - marginal
A diffuse glow sits on the east horizon. Faint objects below 20 degrees in this direction are compromised.
east-south-east - poor
The lower east-south-east sky is heavily light-polluted. Only the brightest stars stand out near the horizon.
south-east - poor
The south-east sky is washed out near the horizon. Most constellation stars in the lower sky here are not visible.
south-south-east - poor
Heavy light pollution to the south-south-east. The lower 30 degrees of sky in this direction are unusable for faint targets.
south - poor
The lower south sky is heavily light-polluted. Only the brightest stars stand out near the horizon.
south-south-west - poor
The south-south-west sky is washed out near the horizon. Most constellation stars in the lower sky here are not visible.
south-west - poor
The lower south-west sky is heavily light-polluted. Only the brightest stars stand out near the horizon.
west-south-west - marginal
The west-south-west lower sky is measurably brighter than the darker quarters. Limit faint work to above about 20 degrees here.
west - fair
A faint diffuse glow on the west horizon. Stars are visible to low elevation, with minor losses near the ground.
west-north-west - fair
A trace of skyglow near the west-north-west horizon. Stars are clear throughout this direction except very close to the ground.
north-west - fair
Faint glow on the north-west horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
north-north-west - fair
Faint glow on the north-north-west horizon. Most stars are visible to low elevation; only the faintest near the ground are affected.
zenith - marginal
The overhead sky background is high. Bright stars and planets are clear; faint stars are suppressed.
-
27 km NE
- Direction
- NE
- Distance (km)
- 26.9
- SQM
- 19.67
- Bortle
- 6
-
52 km NNE
- Direction
- NNE
- Distance (km)
- 51.9
- SQM
- 20.48
- Bortle
- 5
-
76 km SE
- Direction
- SE
- Distance (km)
- 75.8
- SQM
- 20.53
- Bortle
- 5