Astronomers released a detailed test image of the Seagull Nebula captured by the NSF–DOE Vera C. Rubin Observatory using its commissioning camera. The 144-megapixel view helped test observatory hardware and image processing pipelines before the formal launch of the Legacy Survey of Space and Time.
Two years ago, the LSST Commissioning Camera — known as ComCam — began recording the night sky before the full survey camera began its 10-year mission, and the engineering team put the telescope through a dry run. The resulting data yielded an image of IC 2177, a region in space widely recognized as the head of the Seagull Nebula.
Rubin Observatory operates as a joint initiative between the U.S. National Science Foundation and the U.S. Department of Energy’s Office of Science. The engineering test campaign ran across seven weeks from October 24 to December 11, 2024, collecting approximately 16,000 separate exposures. The facility is operated jointly by NSF NOIRLab and SLAC National Accelerator Laboratory.
Cloud Formations And Star Birth In Sharpless 2-292
Located roughly 3,700 light-years from Earth, the Seagull Nebula spans three expansive gas clouds situated between the constellations Monoceros and Canis Major. These clouds are cataloged as Sharpless 2-292, Sharpless 2-296, and Sharpless 2-297. The featured section of the nebula is Sharpless 2-292, which forms the bird’s head.
The pink plumage consists of hydrogen gas that glows brightly as ionizing radiation streams outward from young stars located at the cloud’s center, and the distinct pink and blue hues across the nebula stem from active star formation. The bird’s blue feathers comprise clouds of dust reflecting light from young, blue stars nesting elsewhere in the region.
Researchers note that studying these stellar nurseries provides insight into the early history of our Sun and our planet.
ComCam Performance And The Transition To The LSST Camera
Brookhaven Lab provided the capabilities that made the sensor array — the largest charge-coupled device array ever built — possible, and ComCam had 144 megapixels, making it much smaller than the 3,200-megapixel LSST Camera. ComCam was used as an engineering test camera before the larger instrument was mounted on the Simonyi Survey Telescope to execute the Legacy Survey of Space and Time.
While ComCam provided the deepest and sharpest view of the region until LSST collects more data, it operated on a much smaller scale than the instrument now mounted on the telescope.
Working through the 16,000 ComCam exposures allowed Rubin’s image processing group to gain initial practice dealing with the intricate formations present in stellar nurseries. That background enabled the specialists to spot and fix data-handling hurdles that would later appear when handling the massive LSST Camera pictures — such as those of the Trifid and Lagoon Nebulae, featured in the Rubin First Look collection made public in June 2025.
Having finished its active telescope duties, ComCam now functions as a test bench inside the summit clean room, aiding in the evaluation of LSST Camera software and routine operational checks of backup refrigeration compressors and vacuum pumps to maintain their readiness.