Bojonggambir Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

20.91

Bortle class

Class 4 (Class 4)

Darkness Quotient

67%

Dataset

July 2026

Rural/suburban transition

Bojonggambir: The Practical Verdict

Bojonggambir, a small hamlet in West Java, offers a good workable sky under low light pollution conditions. The overall astronomical quality here is characterised by a faint or conditional Milky Way, visible only under optimal transparency. The brightest horizon is to the north-north-east, which limits views in that direction.

From Bojonggambir, bright galaxies, emission nebulae, and open clusters become viable observational targets along with promising opportunities for widefield imaging. However, very low surface-brightness objects remain elusive, and the conditions are not suited for ambitious Milky Way photography unless transparency is exceptional.

While there are nearby sites like Simpang, about 15 km to the south-south-west, that offer marginally darker skies, there is no meaningful upgrade in quality. Attending to local atmospheric conditions will be more consequential than seeking marginally darker sites.

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.

Long 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 May, October.

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