# eROSITA DR2 catalog lists nearly 2 million X-ray sources

_Friday, September 11, 2026 at 9:00 AM EDT · Science, Infrastructure · Latest · Tier 2 — Notable_

![eROSITA DR2 catalog lists nearly 2 million X-ray sources — Primary](https://scx2.b-cdn.net/gfx/news/2026/erositas-second-data-r.jpg)

The German eROSITA Consortium released its second data release this past summer, a catalog combining three full-sky scans from the Spektr-RG observatory launched in 2019.

DR2 lists more than 1.9 million point-like sources and about 64,000 extended sources, almost double the original release, drawing on the mission's first 556 days of stacked observations. The team concluded about 88% of identified sources are extragalactic, mostly actively accreting supermassive black holes. The release coincides with SDSS DR20, whose optical spectroscopy supports joint black-hole studies.

## Sources

- [Phys.org](https://phys.org/news/2026-09-erosita-comprehensive-high-energy-census.html)

---
Canonical: https://techandbusiness.org/newswire/kKR6IHHA-BJuTHANoiCDTY
Retrieved: 2026-09-12T04:07:30.304Z
Publisher: Tech & Business (techandbusiness.org)