Coquitlam Stargazing & Astronomy Report
Light pollution and stargazing locations near Coquitlam
- City
- Coquitlam
- Country
- Canada
- Latitude
- 49.2838
- Longitude
- -122.7932
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 18.34
- Bortle class
- Class 8 (Class 8)
- Darkness Quotient
- 26%
- Dataset
- March 2026
City sky
Stargazing in Coquitlam
Coquitlam is a large suburban city in south-western British Columbia, part of the wider Metro Vancouver urban region and framed by mountains, forest and coastal geography.
The city generally experiences High Light Pollution, with a Darkness Quotient of 26% — making it brighter than strong rural observing locations and placing it among the more light-polluted urban skies in Canada.
For practical observing from within the city, the most reliable targets are the Moon, planets, double stars and the brightest open clusters. A few showpiece deep-sky objects can still be attempted, but faint galaxies, subtle nebulae and the Milky Way are heavily washed out by the city glow.
Meaningfully darker skies are not right on the doorstep, but a worthwhile improvement is available with a longer drive. The nearest reasonable dark-sky step is about 75 kilometres to the west-north-west, near Near Area B (Halfmoon Bay), British Columbia.
The map shows Coquitlam sitting within the broad bright core of the south-west British Columbia urban strip, with a vivid white-pink centre surrounded by red, orange and yellow spill. That pattern points to a strong metropolitan light dome rather than an isolated town-sized glow, with brightness spreading well beyond the city itself.
The darkest areas on the crop are found away from the main urban mass, especially toward the outer north and north-west where the colours fall through blue and then into dark grey and black. There are also smaller isolated bright pockets scattered offshore and around the edges, but these are separated by much darker background sky than the central urban region.
Compared with its surroundings, Coquitlam is clearly part of one of the brightest zones in the whole image. The most obvious route to darker skies is to leave the continuous metropolitan glow behind and head toward the less developed northern and western horizons, where the map shows the light dome thinning much more decisively.
What the overhead sky is like
Looking straight up from Coquitlam, the zenith is still strongly affected by urban light pollution, with an overhead reading of SQM 18.34. Even away from the brightest horizon glow, the sky background remains bright enough to suppress a lot of faint detail.
In practice, familiar constellations are still visible, but they appear with fewer stars than they would from the countryside. The brightest patterns stand out well enough, while the dimmer linking stars, faint clusters and low-contrast deep-sky structure are much harder to pick out.
This is the kind of sky where casual observing is still very possible, but serious deep-sky work benefits enormously from getting out of the city. Looking overhead is noticeably better than looking toward the brighter parts of the horizon, yet it is still far from truly dark.
north - fair
About 15 kilometres north of Coquitlam, the sky improves to Bortle 5, which is fair for brighter deep-sky targets and noticeably better than the city centre. Darker skies become reachable farther on, with Bortle 3 conditions appearing at around 50 kilometres and even darker country beyond that.
north-north-east - fair
Around 15 kilometres to the north-north-east, conditions are Bortle 5, giving a fair suburban-style sky with a worthwhile reduction in glow. This direction improves quite well, reaching Bortle 3 at about 50 kilometres.
north-east - fair
At roughly 15 kilometres north-east, the sky is Bortle 5, so brighter constellations and a modest selection of showpiece objects become more comfortable to observe. Genuinely dark conditions arrive farther out, with Bortle 3 reached at about 50 kilometres.
east-north-east - fair
Fifteen kilometres east-north-east gives a Bortle 5 sky, a decent step up from central Coquitlam for general observing. This direction continues to improve well, with Bortle 3 skies available at around 50 kilometres.
east - marginal
Around 15 kilometres east, the sky is still Bortle 6, so quality remains marginal for anything beyond brighter targets. It does improve with distance, reaching Bortle 3 at about 100 kilometres, with a good intermediate step by around 50 kilometres.
east-south-east - poor
Fifteen kilometres east-south-east, the sky remains poor at Bortle 7, with strong glow still limiting deep-sky observing. A substantial improvement does exist farther out, but you need about 100 kilometres before this direction reaches Bortle 3.
south-east - poor
At around 15 kilometres south-east, the sky is still Bortle 8, so this remains a poor direction for stargazing close to the city. Conditions do improve eventually, but it takes about 100 kilometres before this line of sight reaches Bortle 3.
south-south-east - poor
Fifteen kilometres south-south-east is still firmly Bortle 8, with very heavy urban skyglow. Genuinely dark skies are not reached within the sampled distance in this direction, although conditions do improve to about Bortle 4 much farther out.
south - poor
Around 15 kilometres south, the sky is Bortle 8, so the southern horizon remains strongly light-polluted. Genuinely dark skies are not within the sampled radius in this direction, though there is some improvement farther out to around Bortle 4.
south-south-west - poor
Fifteen kilometres south-south-west is very bright at Bortle 9, making it one of the poorest directions close to Coquitlam. It improves unevenly, but truly dark conditions are only reached much farther away, at around 200 kilometres.
south-west - poor
At roughly 15 kilometres south-west, the sky is Bortle 9, so this is another poor direction for quick-drive observing. Better conditions do arrive eventually, with Bortle 3 reached at about 100 kilometres.
west-south-west - poor
Fifteen kilometres west-south-west remains Bortle 8, with a strong urban glow still dominating the sky. There is a worthwhile improvement farther out, with Bortle 3 conditions appearing at around 100 kilometres.
west - poor
Around 15 kilometres west, the sky is still Bortle 8, so close-in observing remains heavily compromised. This direction does improve later on, but genuinely dark skies are only reached at about 200 kilometres, with a good step to Bortle 4 before that.
west-north-west - poor
Fifteen kilometres west-north-west gives a Bortle 7 sky, still poor but beginning to edge away from the worst of the city glow. A much better result is available farther out, with Bortle 3 reached at about 100 kilometres.
north-west - fair
At around 15 kilometres north-west, conditions improve to Bortle 5, making this a fair direction for a quick escape from the city core. Darker skies are available farther along this route, reaching Bortle 2 by about 100 kilometres.
north-north-west - fair
Fifteen kilometres north-north-west is Bortle 5, offering a fair suburban sky and a noticeable gain over central Coquitlam. This direction keeps improving, with Bortle 2 conditions reached at about 100 kilometres.
zenith - poor
Straight overhead in Coquitlam, the sky is Bortle 8, so the zenith is bright rather than truly dark. The main constellations are still easy enough to recognise, but many fainter stars disappear into the background glow and the Milky Way is effectively lost from view.
-
Near Area K (East Chilcotin), British Columbia
- Direction
- SW
- Distance (km)
- 269.1
- SQM
- 21.80
- Bortle
- 2
Milky Way, faint nebulae, deep-sky imaging
-
Near Area A (Bamfield), British Columbia
- Direction
- W
- Distance (km)
- 142.6
- SQM
- 21.64
- Bortle
- 3
Milky Way visible, broadband DSO imaging
-
Near Area B (Halfmoon Bay), British Columbia
- Direction
- WNW
- Distance (km)
- 76.9
- SQM
- 21.26
- Bortle
- 4
Bright nebulae, galaxies, narrowband imaging
Genuinely dark skies require a meaningful trip from Coquitlam rather than a quick hop outside town.
The nearest reasonable dark-sky option is about 75 kilometres to the west-north-west at Near Area B (Halfmoon Bay), British Columbia, where conditions improve to Bortle 4. If you are prepared to go farther, much darker skies open up beyond that, with Bortle 3 and Bortle 2 sites available deeper into British Columbia.
-
Within 100 km
- Place
- Near Area B (Halfmoon Bay), British Columbia
- Direction
- WNW
- Distance (km)
- 76.9
- SQM
- 21.26
- Bortle
- 4
-
Within 200 km
- Place
- Near Area A (Bamfield), British Columbia
- Direction
- W
- Distance (km)
- 142.6
- SQM
- 21.64
- Bortle
- 3
-
Within 500 km
- Place
- Near Area K (East Chilcotin), British Columbia
- Direction
- SW
- Distance (km)
- 269.1
- SQM
- 21.80
- Bortle
- 2
Long-term sky brightness trend
Coquitlam's long-term record is fairly steady overall. The mean reading across 75 datasets is SQM 18.41, while the latest value is SQM 18.34 — a little brighter than the long-term average, but not dramatically different.
The full range does show that conditions can vary a good deal, from a brightest reading of SQM 17.92 to a darkest reading of SQM 21.97. That spread is likely to reflect changing atmospheric conditions and local lighting influence as much as any simple long-term shift.
The underlying trend is essentially flat, with a calculated slope of 0.0012 SQM per year. In plain terms, Coquitlam's night sky has not changed much in this record, remaining firmly in the bright urban category.
From Coquitlam itself, stargazing is best kept to bright, high-contrast targets. The Moon and planets show well, and double stars or the brightest open clusters can still be rewarding through binoculars or a telescope.
A few showcase deep-sky objects remain possible with patience, especially the brightest nebulae and globular clusters, but contrast is the main problem rather than sheer magnification. Extended and delicate objects lose a lot of their structure against the bright sky background.
For the Milky Way, faint galaxies, rich nebula fields and meteor watching, a darker site makes an enormous difference. Those are the targets most worth saving for a trip out of the city.
- Moon
- planets
- double stars
- brightest open clusters
- bright nebulae such as M42
- the brightest globular clusters
- Milky Way
- faint galaxies
- broadband nebulae
- meteor showers
Can you see stars from Coquitlam?
Yes — you can still see plenty of brighter stars and the main constellations from Coquitlam. What you lose are the fainter background stars that make the sky look rich and crowded from a darker site.
Can you see the Milky Way from Coquitlam?
In normal city conditions, the Milky Way is effectively washed out from Coquitlam. You would need to travel away from the urban glow for a realistic view of it.
What Bortle class is Coquitlam?
Coquitlam is Bortle Class 8, which is a bright city sky. That means urban skyglow strongly limits deep-sky observing from within the city.
What is the SQM in Coquitlam?
The measured sky brightness for Coquitlam is SQM 18.34. In practical terms, that is a bright urban reading rather than a dark-sky one.
Where are the nearest dark skies to Coquitlam?
The nearest reasonable dark-sky improvement in the supplied locations is Near Area B (Halfmoon Bay), British Columbia, about 76.9 kilometres away to the west-north-west, where conditions reach Bortle 4. Darker still are Near Area A (Bamfield), British Columbia and Near Area K (East Chilcotin), British Columbia farther afield.
Is Coquitlam good for astrophotography?
It can be good for lunar, planetary and narrow-field astrophotography of bright targets, especially if you work carefully with exposure and processing. For wide-field nightscapes, faint nebulae and Milky Way imaging, a darker location is much more suitable.
How far do you need to drive from Coquitlam for darker skies?
For a clear step up from the city, you are looking at roughly 75 kilometres to reach Bortle 4 conditions near Near Area B (Halfmoon Bay), British Columbia. If you want distinctly darker Bortle 3 or Bortle 2 skies, the journey is longer.