MASH Catalogs: 1,238 New Galactic Planetary Nebulae

Over 1,200 new true, likely, and possible Galactic planetary nebulae discovered in the AAO/UKST H-alpha survey of the southern Galactic Plane. The catalog combines the original MASH and MASH-II lists, with over 240 candidates confirmed via spectroscopy. This table was created by NASA's HEASARC in April 2010 based on CDS catalog files.

Use Cases

• Training object detection models for astronomical surveys based on H-alpha emission features.
• Statistical analysis of planetary nebula distribution and properties in the southern Galactic Plane.
• Catalog cross-matching and validation of new celestial objects based on spectroscopic confirmation data.

Strengths

• Contains 1,238 total objects from the combined MASH and MASH-II catalogs.
• Over 240 of the new candidates were confirmed as bona fide planetary nebulae via spectroscopic observations.
• Derived from the AAO/UKST H-alpha survey, which the description notes had depth, resolution, uniformity, and areal coverage permitting new detections.

Limitations

• Column-level documentation is absent; field semantics must be inferred after download.
• Row count is unknown, which may limit suitability assessment.
• Last updated 2026-03-13 19:45:06.749310; freshness should be verified.

Provenance

Source

NASA HEASARC, based on CDS Catalog V/127A files.

Collection Method

Discovered via the AAO/UKST H-alpha survey of the southern Galactic Plane and confirmed with spectroscopic observations.

Freshness

Last updated 2026-03-13 19:45:06.749310

Geography

Southern Galactic Plane