Grafton Stargazing & Astronomy Report

Key Sky Quality Metrics

SQM (mag/arcsec²)

20.22

Bortle class

Class 6 (Class 6)

Darkness Quotient

52%

Dataset

March 2026

Bright suburban sky

Stargazing in Grafton

Grafton is a regional city in northern New South Wales, known for its broad river setting and relaxed country-town character.

With a Darkness Quotient of 52%, Grafton sits in the Moderate Light Pollution tier — noticeably darker than major metropolitan areas, but still not especially dark by rural Australian standards.

In practical terms, brighter targets are the most realistic from within the city: the Moon, planets, double stars and the brightest open clusters, along with a handful of showpiece deep-sky objects on transparent nights. Fainter galaxies and more delicate nebulae are still washed back by the local skyglow, so serious deep-sky observing benefits from getting outside town.

Grafton is actually quite well placed for a quick escape to darker skies. A clearly darker site lies about 25 kilometres to the east-north-east near Near New South Wales, with similarly strong options east and south-east as well.

The map shows Grafton as a modest but distinct pool of light rather than a vast urban glare, with the city surrounded by a soft grey halo and a scattering of smaller blue-green light sources in the wider region.

The darkest areas appear away from those clusters, especially across the broader black zones to the west and between the brighter corridors to the east and south-east. That pattern suggests Grafton is bright enough to affect the local sky directly overhead and near the horizon, but it sits within a region where genuinely dark country skies return fairly quickly once you leave the immediate built-up area.

Compared with its surroundings, Grafton is one of the brighter local sources on the map, though nowhere near the scale of the much more intense glow visible toward the far north-east edge of the crop. For observers, that means the city itself is compromised, but the surrounding countryside offers a rapid improvement rather than a long struggle through continuous urban light.

What the sky overhead is like

Looking straight up from Grafton, the zenith is brighter than a truly rural sky but still usable for casual observing. The overall impression is of a suburban-style sky where the brighter constellations remain easy to follow, while the dimmer background star fields are thinned out.

At this brightness level, the sky overhead still supports enjoyable sessions on the Moon, planets and brighter star clusters, and some of the more obvious deep-sky showpieces can come through with care. What you lose is subtle contrast: faint outer structure in nebulae, weaker galaxies and the richer texture of the Milky Way are all much better once you move away from the city glow.

The encouraging part for Grafton is that the overhead sky is only part of the story. Since darker country skies lie quite nearby, observers can treat the city as a convenient base and head out when they want the sky to look dramatically richer.

• Near New South Wales

  Direction

  ENE

  Distance (km)

  23.2

  SQM

  21.67

  Bortle

  3

  Milky Way visible, broadband DSO imaging

• Near New South Wales

  Direction

  E

  Distance (km)

  20

  SQM

  21.62

  Bortle

  3

  Milky Way visible, broadband DSO imaging

• Near Clarence Valley Council, New South Wales

  Direction

  SE

  Distance (km)

  22.6

  SQM

  21.55

  Bortle

  3

  Milky Way visible, broadband DSO imaging

Genuinely dark skies are close at hand from Grafton rather than requiring a major journey. The nearest strong step up is about 25 kilometres to the east-north-east at Near New South Wales, where conditions reach Bortle 3.

There are similarly dark alternatives at roughly 20 kilometres due east and about 25 kilometres to the south-east, so the city is better placed than most for a spontaneous observing trip.

• Within 25 km

  Place

  Near New South Wales

  Direction

  ENE

  Distance (km)

  23.2

  SQM

  21.67

  Bortle

  3

Long-term sky trend

Grafton's night sky has been fairly stable over the long term. The measured SQM shifts only from 20.26 in the earliest record to 20.22 in the latest one, which points to a very slight brightening over time rather than a dramatic change.

The wider spread is also modest, with readings ranging from 20.17 to 20.40 across 76 datasets. In plain terms, that suggests local observers are seeing a sky that has changed a little over the years, but not enough to alter the overall character of city-centre stargazing.

The underlying trend slope is small, so the main message here is consistency: Grafton remains a middling urban observing location in its centre, with much better sky close by beyond the built-up glow.

From within Grafton, the most dependable targets are the bright, high-contrast ones: the Moon, planets, double stars and the showiest clusters. A few headline deep-sky objects are possible too, especially with a telescope and good transparency, but they will not show their best detail against the city sky.

The real advantage here is how quickly conditions improve beyond town. Because much darker skies are available after a fairly short drive, objects that are underwhelming in the city — the Milky Way, faint galaxies and low-contrast nebulae in particular — become far more satisfying from nearby rural locations.

• Moon
• planets
• double stars
• brightest open clusters
• bright nebulae such as M42
• bright globular clusters

• larger bright emission nebulae
• the brightest galaxies
• richer star fields in binoculars

• Milky Way
• faint galaxies
• broadband nebulae
• dark nebulae
• meteor showers
• subtle nebular structure