On March 26, 2025, the LAMOST DR12 (v1.0) dataset was officially released to domestic astronomers and international partners. This dataset contains over 28.07 million spectra, and LAMOST remains the survey project that has released the most spectra worldwide.
The DR12 dataset is a collection of the spectra obtained by LAMOST from September 2023 to June 2024. The released 28.07 million spectra include 12.60 million low-resolution spectra and 15.47 million medium-resolution spectra. Additionally, a catalog of about 11.50 million sets of stellar spectral parameters was also released in DR12. The total number of spectra and the stellar parameter catalog released by?LAMOST continue to rank first in the world.?
???????????Table 1: Information of LAMOST DR10 dataset in detail.
The National Astronomical Data Center has developed a newly architected data release platform for LAMOST DR12. This platform supports IVOA (International Virtual Observatory Alliance) data access protocols including ConeSearch, SSA, and TAP. Scientific users may access the website (https://www.lamost.org/dr12/v1.0/) for data queries and downloads.
To date, over 1,700 users from 236 research institutions and universities across China, the United States, Germany, Belgium, Denmark, and other countries/regions are conducting research using LAMOST data. These efforts have yielded more than 1,900 high-quality publications with over 20,000 citations. In recent years, LAMOST data has supported an average annual output exceeding 200 research papers, of which more than 40% originate from international astronomers. This demonstrates the global impact of LAMOST data. LAMOST's scientific productivity now ranks among the foremost international large-aperture (6-10m) astronomical telescopes.
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Figure?shows?the?sky?coverage?maps?of?LAMOST?DR12,?with?the?low-resoulution?survey?on?the?left?and?the?medium-resoulution?survey?on?the?right
