Tenjo Stargazing & Astronomy Report
Light pollution and stargazing locations near Tenjo
- City
- Tenjo
- Country
- Indonesia
- Latitude
- -6.3783
- Longitude
- 106.4806
Key Sky Quality Metrics
- SQM (mag/arcsec²)
- 19.83
- Bortle class
- Class 6 (Class 6)
- Darkness Quotient
- 45%
- Dataset
- July 2026
Bright suburban sky
Tenjo: The Practical Verdict
Tenjo is a hamlet located in West Java, Indonesia. It experiences moderate light pollution, resulting in a limited suburban sky for stargazing. The primary restriction is the overall brightness, making faint celestial objects challenging to observe.
The sky above Tenjo is generally too bright for a reliable view of the Milky Way. Observers will find that the Moon, planets, and double stars serve as the best targets. Bright open clusters and narrowband imaging also stand out under these conditions, whereas faint nebulae and broadband galaxies are best avoided.
For a serious improvement in sky quality, travelling to Pandeglang in Banten, about 80 km to the west-south-west, offers significantly better conditions with darker skies that allow for deep-sky viewing.
At a Glance
- Overall
- Limited suburban sky - This is a limited sky for astronomy. The brightest targets remain accessible, but faint deep-sky observing is heavily compromised.
- Milky Way
- Not visible - The sky background is generally too bright for a reliable Milky Way view.
- Best targets from here
- Moon, planets, double stars, bright open clusters, narrowband imaging, bright nebula cores
- Do not prioritise
- broadband galaxies, reflection nebulae, visual faint nebulae, Milky Way photography
- Best nearby upgrade
- Pandeglang, Banten sits about 80 km west south west and reaches Bortle 4, roughly 3.1x darker.
- Long dark window
- Tenjo 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 Tenjo?
No. Tenjo is a Bortle Class 6 sky with SQM 19.83, 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 Tenjo?
Tenjo is Bortle Class 6 (SQM 19.83), a limited suburban sky for astronomy.
Is Tenjo good for stargazing?
Not for serious deep-sky observing. Tenjo is a limited suburban sky where the Moon, planets, and a handful of bright targets are the realistic options from the city itself.
Is Tenjo good for astrophotography?
Broadband deep-sky imaging is heavily compromised from Tenjo and a Bortle 4 or darker site is strongly recommended. Narrowband imaging of bright emission nebulae remains viable from Tenjo with appropriate Ha or OIII filters.
What can you observe from Tenjo?
Primary targets from Tenjo include Moon, planets, double stars, bright open clusters, narrowband imaging. Targets such as broadband galaxies, reflection nebulae, visual faint nebulae are not realistic from this sky.
Where are darker skies near Tenjo?
The closest meaningfully darker mapped site is Sukabumi, West Java, about 80 km south of Tenjo, reaching Bortle 4.
When is the sky darkest in Tenjo?
The sky over Tenjo is darkest around May, October.
Is light pollution in Tenjo getting better or worse?
Long-term light pollution over Tenjo has been broadly stable across the available measurements.
north - marginal
A diffuse glow sits on the north horizon. Faint objects below 20 degrees in this direction are compromised.
north-north-east - marginal
Noticeable glow on the north-north-east horizon. Stars below about 20 degrees in this direction are dimmed.
north-east - marginal
Noticeable glow on the north-east horizon. Stars below about 20 degrees in this direction are dimmed.
east-north-east - marginal
The east-north-east lower sky is measurably brighter than the darker quarters. Limit faint work to above about 20 degrees here.
east - fair
The east sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
east-south-east - fair
The east-south-east sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
south-east - good
No noticeable light pollution to the south-east. The sky in this direction is dark to the horizon.
south-south-east - good
Dark horizon to the south-south-east. Faint stars and extended objects in this direction behave much as they do overhead.
south - good
No noticeable light pollution to the south. The sky in this direction is dark to the horizon.
south-south-west - good
The south-south-west horizon is dark. Faint stars are visible close to the ground.
south-west - good
Dark horizon to the south-west. Faint stars and extended objects in this direction behave much as they do overhead.
west-south-west - good
The west-south-west horizon is dark. Faint stars are visible close to the ground.
west - good
No noticeable light pollution to the west. The sky in this direction is dark to the horizon.
west-north-west - fair
The west-north-west sky is broadly dark with a small amount of glow at the horizon. Most objects in this direction are accessible.
north-west - fair
A trace of skyglow near the north-west horizon. Stars are clear throughout this direction except very close to the ground.
north-north-west - fair
A trace of skyglow near the north-north-west horizon. Stars are clear throughout this direction except very close to the ground.
zenith - fair
Moderate light pollution overhead. The Milky Way cannot be seen and the star field is sparser than at a dark site.
-
Bojongmangu, Banten
- Direction
- SSW
- Distance (km)
- 41.3
- SQM
- 20.77
- Bortle
- 5
-
Cigaclung, Banten
- Direction
- SW
- Distance (km)
- 30.8
- SQM
- 20.44
- Bortle
- 5
-
Pandeglang, Banten
- Direction
- WSW
- Distance (km)
- 79.8
- SQM
- 21.06
- Bortle
- 4
-
Sukabumi, West Java
- Direction
- S
- Distance (km)
- 79.7
- SQM
- 20.94
- Bortle
- 4