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Service outage (June 2023)

Posted by CDS admin on 22 June 2023 10:01 CEST

A major reorganisation of the CDS machine room will take place on 27 and 28 June. Some of CDS services may be interrupted for a few hours during this period. If necessary, use the service mirrors (notably:, and (HiPS)...). Read more...

Reorganized list of object types

Posted by Simbad Team on 20 May 2022 15:03 CEST

Beginning of June, the historical list of object types in SIMBAD will be replaced by a reorganized list, based on physical properties, and on the evolutionary stage for stars. It will enable a more interactive search, and will provide minimal definitions. The hierarchies between object types will evolve: for instance, a RR Lyrae Star will still be in the hierarchy of Variable Stars, and also in the hierarchy of Horizontal Branch Stars.

If you are using the hierarchies in scripts, you might have to adapt your scripts to the new description.

Please, have a look to the documentation on object types in SIMBAD:

Troubleshooting on the University of Strasbourg network

Posted by CDS admin on 12 October 2020 16:18 CEST

The University of Strasbourg is reorganizing its computer network. Consequently, all CDS services in Strasbourg (Simbad, VizieR, Aladin, etc.) will be inaccessible on Oct 12 from 10 p.m. to midnight, and from Oct 14 from 10 p.m. to Oct 15 at 4 a.m. (UTC + 1). All the CDS mirror sites will remain accessible, in particular and,, ... We apologize for any inconvenience.


Posted by Simbad Team on 12 October 2020 15:19 CEST

Simbad will be down during about 2 hours at 22:00 (UTC+1) the 12th of october due to University management.
Sorry for this inconvenience, please use the mirror website :

Simbad Downtime on 24-Jan

Posted by Simbad Team on 23 January 2019 15:19 CET

Due to hardware issue, the 24th of January the simbad service should be redirected temporarly to the mirror :

Sorry in advance for this downtime

TAP new feature: improvement of the object names normalisation

Posted by Simbad Team on 26 October 2018 10:48 CEST

A new feature in SIMBAD TAP allows you to submit a list of object names (e.g. by uploading your own table ; cf the documentation) and let SIMBAD try to find the correct identifier in SIMBAD.

Please read carefully the documentation (, and if you need more help, send us an email

Cross-identification of SIMBAD with Gaia DR2

Posted by Simbad Team on 29 June 2018 17:29 CEST

Cross-identification of SIMBAD with Gaia DR2

The cross-identification between the SIMBAD database and the ESA Gaia mission Data Release 2 has been successfully performed on June 30, 2018, on about 4.5 million objects.

The following data have been upgraded in SIMBAD :

4.5 million coordinates, Gaia DR2 identifiers, G magnitudes
3.8 million parallaxes
3.8 million proper motions
2.0 million radial velocities

Simbad Tap upgrade

Posted by Simbad Team on 22 May 2018 17:52 CEST

The new TAP library (2.2 version) is now deployed on Simbad.
Please send to your feedback if you encounter any problem.

Gaia identifiers change

Posted by CDS admin on 21 November 2017 00:11 CET

The acronym Gaia is going to be changed in Simbad into Gaia DR1. Read more...

Parallax measurements

Posted by Simbad Team on 29 September 2017 17:09 CEST

Due to a better accuracy in the measurements of parallax, values and errors are now stored in mas.yr-1 (instead of arcsec before)

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