HOPS: Herschel Orion Protostar Survey Spectral Energy Distributions

The Herschel Orion Protostar Survey (HOPS) dataset from NASA contains photometric data for 410 young stellar objects in the Orion molecular clouds. It includes fluxes from 2MASS, Spitzer, Herschel, and APEX covering wavelengths from 1.2 to 870 microns, used to classify 330 protostars into evolutionary classes. The dataset was last updated on 2026-03-13.

Use Cases

• Classify protostellar evolutionary stages based on mid-IR spectral indices and bolometric temperatures mentioned in the description
• Fit protostellar model parameters using the grid of 30,400 model SEDs described
• Analyze the correlation between infrared and submillimeter fluxes across the 1.2-870 micron range
• Identify potential extragalactic contaminants among the sample of young stellar objects

Strengths

• Sample of 410 young stellar objects with multi-wavelength coverage
• Includes classification of 330 protostars into 92 Class 0, 125 Class I, 102 flat-spectrum, and 11 Class II sources
• Accompanied by a grid of 30,400 model spectral energy distributions for parameter fitting

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Not every source has data at all wavelengths, as noted in the description

Provenance

Source

National Aeronautics and Space Administration

Collection Method

Selected from Spitzer data, with photometry from 2MASS, Spitzer, Herschel, and APEX telescopes.

Time Range

null

Freshness

Last updated 2026-03-13 17:34:31.594152; freshness should be verified

Geography

Orion molecular clouds