Johannesburg Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.63

Bortle class

Class 8 (Class 8)

Darkness Quotient

29%

Dataset

July 2026

City sky

Johannesburg: The Practical Verdict

Johannesburg is a global metropolis located in the Gauteng region of South Africa. With its classification as a high-light-pollution zone, stargazing conditions here are challenging, offering primarily poor city sky qualities. The glowing urban backdrop erases the Milky Way entirely, restricting clear views of many astronomical phenomena. The primary limiting factors include dense urban light pollution and a persistent bright sky.

Practical observing in Johannesburg is relegated mainly to bright objects such as the Moon, planets, and double stars. These targets are generally reliable even in compromised conditions, while deep-sky observers will find little success with faint nebulae and galaxies. The South offers slight relief, being the cleanest horizon compared to the east-north-east.

For those looking to improve their stargazing experience, Phumelela Ward 8 in Free State, about 210 km south-east, offers a modest upgrade to Bortle Class 5 skies. While this isn't a dramatic improvement, it does provide better night-sky conditions for enthusiasts willing to travel.

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

Phumelela Ward 8, Free State is the strongest nearby option but remains Bortle 5; the improvement is real but modest.

Good dark window

Johannesburg's longest dark windows fall in June and July, with the shortest nights around December and January. For deep-sky imaging, winter gives the best combination of long nights and true astronomical darkness.

Frequently Asked Questions

Can you see the Milky Way from Johannesburg?

No. Johannesburg is a Bortle Class 8 sky with SQM 18.63, 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 Johannesburg?

Johannesburg is Bortle Class 8 (SQM 18.63), a poor city sky for astronomy.

Is Johannesburg good for stargazing?

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

Is Johannesburg good for astrophotography?

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

What can you observe from Johannesburg?

Primary targets from Johannesburg 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 Johannesburg?

The closest meaningfully darker mapped site is Rustenburg Ward 36, North West, about 80 km north west of Johannesburg, reaching Bortle 6.

When is the sky darkest in Johannesburg?

The sky over Johannesburg is darkest around June, July.

Is light pollution in Johannesburg getting better or worse?

There is not yet enough long-term data to give a confident trend for Johannesburg.

• Tshwane Ward 105, Gauteng

  Direction

  NE

  Distance (km)

  89.5

  SQM

  20.30

  Bortle

  6

• Rustenburg Ward 36, North West

  Direction

  NW

  Distance (km)

  80.2

  SQM

  20.05

  Bortle

  6

• Phumelela Ward 8, Free State

  Direction

  SE

  Distance (km)

  209.4

  SQM

  20.66

  Bortle

  5