April 2023 Release Highlights

Database Contents

Tabular summaries of NED's current holdings are presented here. Graphic summaries are presented here.

References and Object Pointers

119,101 new object links (pointers) to 1,076 new references including:

  • X-ray detections, optical idetifications, redshifts, and positions from the eROSITA X-ray telescope on board the Spectrum-Poentgen-Gamma (SPG) observatory including: The eROSITA Final Equatorial-Depth Survey (eFEDS) - Catalog of galaxy clusters and groups (Liu, T. et al., 2022A&A...661A...2L ) and SRG/ART-XC all-sky X-ray survey: Catalog of sources detected during the first year (Pavlinsky, M. et al., 2022A&A...661A..38P )
  • 8,683 QSOs from Search for extended Lyman-a emission around 9k quasars at z = 2-3 (Shimakawa, R 2022MNRAS.514.3910S )
  • 7,628 AGNs from The Fourth Catalog of Active Galactic Nuclei Detected by the Fermi Large Area Telescope: Data Release 3 (Ajello, M. et al., 2022ApJS..263...24A )
  • 5,760 diffuse galaxies from Systematically Measuring Ultra-diffuse Galaxies (SMUDGes). III. The Southern SMUDGes Catalog (Zaritsky, D. et al., 2022ApJS..261...11Z )
  • 5,378 galaxies and spectroscopic redshifts from The Active Galactic Nuclei in the Hobby-Eberly Telescope Dark Energy Experiment Survey (HETDEX). I. Sample Selection (Liu, C. et al., 2022ApJS..261...24L )

Cross-IDs and New Objects

  • 90,766 sources from the literature cross-identified with NED objects
  • 15,215 new NED objects including galaxies, quasars, clusters of galaxies, supernovae, globular clusters as well as unidentified radio, visual, infrared, X-ray, and gamma-ray sources
  • 804 Supernovae through February 2023 from Transient Name Server


  • 77,823 additional redshifts
  • 9,948 more objects with redshifts

For highlights in previous releases, please see Archived Release Notes.