Bojonggambir Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

20.91

Bortle class

Class 4 (Class 4)

Darkness Quotient

67%

Dataset

May 2026

Rural/suburban transition

Bojonggambir: The Practical Verdict

Bojonggambir is a hamlet in West Java, Indonesia, offering a rural setting for stargazing. The area provides a good workable sky, where astronomers can enjoy a reasonable night under Class 4 conditions. The primary limitation is light pollution from the north north east.

From this location, the Milky Way may present itself under transparent, moonless nights but lacks the depth seen in dark-sky sites. The best targets include bright galaxies and emission nebulae, alongside clusters, which are observable under good conditions. Very faint objects and ambitious Milky Way photography should be avoided when transparency is less than ideal.

While options for a meaningful upgrade are limited, Simpang, around 15 km to the south-south-west, offers a marginally darker sky under Bortle Class 3 conditions. Local transparency is crucial for optimal observing here.

At a Glance

Overall

Good workable sky - This is a good workable astronomy location. The sky is not pristine, but many deep-sky targets remain accessible.

Milky Way

Faint or conditional - The Milky Way may be visible under transparent, moonless conditions, but it will not have strong dark-site contrast.

Best targets from here

bright galaxies, emission nebulae, open clusters, globular clusters, Milky Way under good conditions, widefield imaging

Do not prioritise

very low surface-brightness objects, ambitious Milky Way photography under mediocre transparency

No meaningful upgrade nearby

Nearby sites are not notably darker. Local conditions will matter more than chasing a slightly darker map value.

Good dark window

Bojonggambir retains astronomical darkness throughout the year, so seasonality is less extreme than at higher latitudes. The main limitation is light pollution, not the length of the dark window.

Frequently Asked Questions

Can you see the Milky Way from Bojonggambir?

Conditionally. From Bojonggambir the Milky Way may show as a faint suggestion under transparent, moonless conditions, but it lacks dark-site contrast.

What Bortle class is Bojonggambir?

Bojonggambir is Bortle Class 4 (SQM 20.91), a good workable sky for astronomy.

Is Bojonggambir good for stargazing?

Partly. Bojonggambir offers a good workable sky where many bright targets remain accessible, but the faintest deep-sky work is compromised.

Is Bojonggambir good for astrophotography?

Broadband deep-sky imaging is realistic from Bojonggambir. Narrowband imaging of bright emission nebulae remains viable from Bojonggambir with appropriate Ha or OIII filters.

What can you observe from Bojonggambir?

Primary targets from Bojonggambir include bright galaxies, emission nebulae, open clusters, globular clusters, Milky Way under good conditions. Targets such as very low surface-brightness objects, ambitious Milky Way photography under mediocre transparency are not realistic from this sky.

Where are darker skies near Bojonggambir?

No meaningfully darker mapped site was found within the search radius around Bojonggambir.

When is the sky darkest in Bojonggambir?

The sky over Bojonggambir is darkest around June, July.

Is light pollution in Bojonggambir getting better or worse?

The long-term trend for Bojonggambir is gradually worsening, with the sky brightening by about 0.04 SQM per year.

• Simpang, West Java

  Direction

  SSW

  Distance (km)

  14.8

  SQM

  21.56

  Bortle

  3

• Cikapinis, West Java

  Direction

  SE

  Distance (km)

  22.6

  SQM

  21.37

  Bortle

  3

• Cianjur, West Java

  Direction

  WNW

  Distance (km)

  69

  SQM

  21.34

  Bortle

  3