Chattanooga Stargazing & Astronomy Report

Light pollution and stargazing locations near Chattanooga

City
Chattanooga
Country
United States
Latitude
35.0456
Longitude
-85.3097

Key Sky Quality Metrics

SQM (mag/arcsec²)
17.88
Bortle class
Class 9 (Class 9)
Darkness Quotient
22%
Dataset
May 2026

Inner city sky

Chattanooga: The Practical Verdict

Chattanooga, a mid-size city in Tennessee, experiences significant urban light pollution that severely impacts stargazing. Under these conditions, characterised by a severe urban sky, only the most luminous celestial objects are visible. The brightest challenges for local astronomers include high levels of localised light pollution affecting the clarity and quantity of visible stars.

The Milky Way remains entirely hidden from view due to the intense light pollution. Observers can primarily target the Moon, planets, and bright stars, with double stars and various solar system events also within reach. However, visual deep-sky observing and aiming for broad-spectrum nebulous objects are not feasible.

For those looking for slight improvements, the skies west-north-west towards Marion County offer a limited upgrade in darkness. While this provides a modest improvement, the gains are not dramatically different, reinforcing the urban challenge of light pollution in and around Chattanooga.

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
Limited nearby upgrade
Marion County, Tennessee is the strongest nearby option but remains Bortle 5; the improvement is real but modest.
Good dark window
Chattanooga'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 Chattanooga?

No. Chattanooga is a Bortle Class 9 sky with SQM 17.88, 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 Chattanooga?

Chattanooga is Bortle Class 9 (SQM 17.88), a severe urban sky for astronomy.

Is Chattanooga good for stargazing?

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

Is Chattanooga good for astrophotography?

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

What can you observe from Chattanooga?

Primary targets from Chattanooga 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 Chattanooga?

The closest meaningfully darker mapped site is Marion County, Tennessee, about 13 km west south west of Chattanooga, reaching Bortle 6.

When is the sky darkest in Chattanooga?

The sky over Chattanooga is darkest around January, December.

Is light pollution in Chattanooga getting better or worse?

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

north - good

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

north-north-east - fair

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

north-east - fair

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

east-north-east - fair

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

east - marginal

Moderate brightening on the east horizon. Star counts at low elevation here are reduced.

east-south-east - fair

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

south-east - fair

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

south-south-east - fair

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

south - good

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

south-south-west - good

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

south-west - good

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

west-south-west - good

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

west - good

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

west-north-west - good

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

north-west - good

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

north-north-west - good

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

zenith - poor

Overhead is heavily light-polluted. Only stars brighter than about magnitude 3 are visible.

  • Marion County, Tennessee
    Direction
    WSW
    Distance (km)
    13.1
    SQM
    20.11
    Bortle
    6
  • Marion County, Tennessee
    Direction
    WNW
    Distance (km)
    42.2
    SQM
    20.60
    Bortle
    5
  • Council Bluff, Alabama
    Direction
    SSW
    Distance (km)
    61.6
    SQM
    20.72
    Bortle
    5
  • Narrows Lookout Tower, Georgia
    Direction
    S
    Distance (km)
    52.4
    SQM
    20.14
    Bortle
    6
  • Rogers Creek, Tennessee
    Direction
    NE
    Distance (km)
    75.2
    SQM
    20.30
    Bortle
    5
  • Fox Fire Trail, Georgia
    Direction
    ESE
    Distance (km)
    88.3
    SQM
    20.15
    Bortle
    6