Johannesburg Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

18.63

Bortle class

Class 8 (Class 8)

Darkness Quotient

29%

Dataset

August 2026

City sky

Johannesburg: The Practical Verdict

As the largest city in South Africa, Johannesburg offers a spectacular urban experience but presents obstacles for astronomy. The skies here are characterised by high light pollution, rendering them unsuitable for deep-sky observation. The Milky Way is entirely absent in this bright urban backdrop.

Under such conditions, observers can focus on the Moon, planets, and bright stars. Double stars and solar system events are viable targets as well, though narrowband imaging should be approached with care due to the bright sky background. Most visual and broadband deep-sky observations should be avoided, including attempts at capturing reflection nebulae and meteor showers.

Nearby areas, like Phumelela Ward 8 in the Free State, offer some improvement, though with modest gains. Situated approximately 210 km to the south-east, this site is not dramatically darker but could be a reasonable option for those seeking a minor reduction in light pollution.

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?

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

• 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