Rochester Stargazing & Astronomy Report

Light pollution and stargazing locations near Rochester

City
Rochester
Country
United States
Latitude
43.1566
Longitude
-77.6088

Key Sky Quality Metrics

SQM (mag/arcsec²)
17.70
Bortle class
Class 9 (Class 9)
Darkness Quotient
21%
Dataset
April 2026

Inner city sky

Rochester: The Practical Verdict

Rochester, located in the state of New York, is a major city with substantial urban development and associated light pollution. The sky quality is classified as severely urban, making serious astronomical study challenging. Bright artificial lighting overwhelms the night sky, with SQM readings of just 17.7, and the Milky Way is entirely hidden from view from within the city.

From Rochester's skies, observers will note that visual astronomy is largely limited to the Moon, planets, and a few of the brightest stars and stellar objects. Widefield or broadband deep-sky viewing, such as galaxies or reflection nebulae, is of little to no viability. For imaging, narrowband techniques are the only approach that could yield results, though imaging conditions remain far from optimal.

Residents and visitors who are serious about astronomy could consider travelling north-north-east to locations like Prince Edward County in Ontario, about 80 km away. This area offers darker skies, roughly Bortle class 4, which support a broader range of astronomical study, including some bright deep-sky objects.

At a Glance

Overall
Severe urban sky - This is a severely light-polluted urban sky. Only the Moon, planets, bright stars, and a few specialist targets remain practical.
Milky Way
Not visible - The Milky Way is not visible from this sky.
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
Best nearby upgrade
Prince Edward County, Ontario sits about 81 km north north east and reaches Bortle 4, roughly 22x darker.
Good dark window
Rochester'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 Rochester?

No. Rochester is a Bortle Class 9 sky with SQM 17.70, 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 Rochester?

Rochester is Bortle Class 9 (SQM 17.70), a severe urban sky for astronomy.

Is Rochester good for stargazing?

Not for serious deep-sky observing. Rochester is a severe urban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.

Is Rochester good for astrophotography?

Broadband deep-sky imaging is heavily compromised from Rochester and a Bortle 4 or darker site is strongly recommended. Even narrowband imaging is difficult from Rochester without careful processing.

What can you observe from Rochester?

Primary targets from Rochester 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 Rochester?

The closest meaningfully darker mapped site is Town of Phelps, New York, about 58 km east south east of Rochester, reaching Bortle 5.

When is the sky darkest in Rochester?

The sky over Rochester is darkest around January, December.

Is light pollution in Rochester getting better or worse?

Long-term light pollution over Rochester has been broadly stable across the available measurements.

north - good

No visible glow on the north horizon. Stars are clear down to low elevation in this direction.

north-north-east - good

The north-north-east sky shows no obvious glow at ground level. Faint stars are clear at low elevation.

north-east - good

Clean, dark sky to the north-east. No visible artificial light source affects this quarter.

east-north-east - fair

The east-north-east horizon is mostly dark with a hint of light pollution. Faint stars are accessible above about 10 degrees.

east - good

Clean horizon to the east. Star counts remain high near the ground.

east-south-east - fair

Mild brightening on the east-south-east horizon. Faint stars at the very lowest elevation are dimmed; otherwise unaffected.

south-east - fair

Subtle skyglow on the south-east horizon. Faint stars below about 10 degrees here are slightly suppressed.

south-south-east - good

The south-south-east horizon is free of artificial brightening. Faint stars are visible to within a few degrees of the ground.

south - good

Clean horizon to the south. Star counts remain high near the ground.

south-south-west - fair

The south-south-west horizon is mostly dark with a hint of light pollution. Faint stars are accessible above about 10 degrees.

south-west - good

The south-west sky shows no obvious glow at ground level. Faint stars are clear at low elevation.

west-south-west - fair

A small artificial brightening near the west-south-west horizon. Star counts in this direction remain high above the lowest elevations.

west - fair

Subtle skyglow on the west horizon. Faint stars below about 10 degrees here are slightly suppressed.

west-north-west - fair

Mild brightening on the west-north-west horizon. Faint stars at the very lowest elevation are dimmed; otherwise unaffected.

north-west - fair

The north-west horizon shows a slight brightening. Workable for most targets above about 10 degrees elevation.

north-north-west - good

Clean, dark sky to the north-north-west. No visible artificial light source affects this quarter.

zenith - poor

Heavy skyglow overhead. A few dozen stars and the brightest planets are accessible to the naked eye.

  • Town of Phelps, New York
    Direction
    ESE
    Distance (km)
    57.6
    SQM
    20.52
    Bortle
    5
  • Prince Edward County, Ontario
    Direction
    NNE
    Distance (km)
    81
    SQM
    21.05
    Bortle
    4
  • Orleans County, New York
    Direction
    NW
    Distance (km)
    63
    SQM
    20.29
    Bortle
    6
  • Brewer's Mills Road, Ontario
    Direction
    NE
    Distance (km)
    177.1
    SQM
    21.21
    Bortle
    4
  • West Burlington, Pennsylvania
    Direction
    SSE
    Distance (km)
    172
    SQM
    20.58
    Bortle
    5
  • Noyes Township, Pennsylvania
    Direction
    S
    Distance (km)
    211.2
    SQM
    20.85
    Bortle
    4