UCC – The Unified Cluster Catalogue

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Version 260409

Fixed wrong transformation Z to FeH (was using natural logarithm instead of 10)
Added:
- Dias et al (2018)
- Joshi et al (2016)
- Dib et al (2018)
- Sampedro et al (2017)
- Deng et al (2023)
- Yang et al (2025)
- Heiter et al (2014)
- Paunzen et al (2010)
- Netopil et al (2022)
- Netopil et al (2016)
Fixed bad naming (duplicates)
- Lada & Lada (2003)
  - L1228 –> LDN_1228
  - L1641C –> LDN_1641C
  - NGC 281W –> NGC 281 West
  - NGC 281E –> NGC 281 East
- Morales et al (2013)
  - W49A Welch Ring –> W49_A
Added comments from:
- Hunt & Reffert (2023)
- Bica et al (2019)

Version 260401

Added Dias et al (2026)
Added Ferreira et al (2026)
Added Dias & Monteiro (2025)
Change naming hierarchy for 262 entries: Melotte < IC < NGC
Added Lynga (1987)
Added van den Bergh & Hagen (1975)
Added Sulentic et al (1973)
Bukowiecki et al. (2011): use kpc distances because (m-M) contains weird values
Zhong et al. (2020): fixed bad values
Tadross et al. (2014): fixed bad distance units (kpc to pc)
New (simpler) formula for C_lit

Version 260320

Added Yan et al. (2026)
Added Otto et al. (2026)
Added Angelo et al. (2023)
Fixed bad OCs in Perren et al. (2022)

Version 260317

Added Bijavara et al. (2025)
Added Cui et al. (2025)
Added Guerco et al. (2025)
Added Li et al. (2023)
Added Spina et al. (2022)
Added Jadhav et al. (2021)
Added Perren et al. (2015)
Added Ahumada & Lapasset (2007)

Version 260309

Added Malhotra et al. (2026)
Added Swiggum et al. (2024)
Added Dias et al. (2022)
Added Kounkel et al. (2020)
Added Kounkel & Covey (2019)
Added Tadross et al. (2014)
Added Camargo et al. (2012)
Added Bica et al. (2003) (1)
Added Dutra et al. (2003)
Added Bica et al. (2003)
Added Dutra & Bica (2001)
Added Dutra et al. (2000)

Version 260301

Added Lui et al. (2025)
Added Richer et al. (2021)
Added Spina et al. (2021)
Added Zhong et al. (2020)
Added Morales et al. (2013)
Added Bukowiecki et al. (2012)
Added Bukowiecki et al. (2011)

Previously only listed as comments:

Added Palma et al. (2025)
Added Piecka & Paunzen (2021)
Added Piatti et al. (2011)

Version 260219

Added Obasi et al. (2026)
Added Chi et al. (2025); CKCWDM objects
Added Rain et al. (2024)
Added Lada & Lada (2003)

Version 260209

Added median and stddev columns for fundamental parameters

Version 260116

Added van den Bergh (2006)
Added Gozha et al. (2012)
Added Dias et al. (2014)
Added Sánchez et al. (2020)
Added Cantat-Gaudin et al. (2020)
Added Almeida et al. (2023)
Added Li et al. (2025)
Added Wei et al. (2025)

Version 260113

Fixed OCs that had issues: alessi58, bochum1, collinder132, feigelson1, fsr0569, lp44, ngc1976, ngc7086a, ngc7086b, ocsn244, ocsn246, trumpler14, trumpler15, trumpler37, ubc1309, ubc491, ascc18, ascc20, hsc517, ngc2264, rsg7, rsg8, ubc602

Version 251206

Added Nizovkina et al. (2025)
Added Carrasco-Varela et al. (2025)
Added Zhang et al. (2024)
Added Monteiro et al. (2019)

Version 251128

Added Soubiran et al. (2018)
Added Cantat-Gaudin et al. (2018)
Added Cantat-Gaudin et al. (2019)
Added Rain et al. (2021)
Added Celli et al. (2024)
Added Almeida et al (2025)
Removed FSR_1758 from Froebrich (2007) (it’s a GC)

Version 251123

Added Roser et al. (2016)
Added Bastian (2019) (contains Gaia 8 only)
Added Cordoni et al. (2023)
Re-process MCM entries 3, 16 & 53 with N=25
Added ‘NGC 1976’ as main name of ‘Trapezium’ in Dambis (1999)
Renamed ‘XDOCC N’ to ‘XDOCC 0N’ in and Piatti (2003), Hunt & Reffert (2023), Hunt & Reffert (2023), and Cavallo (2024)

Version 251117

Added Kronberger et al. (2006)
Added Alessi et al. (2003)
Added Mercer et al. (2005)
Added Piskunov et al. (2007)
Added Piskunov et al. (2008)

Version 251115

Added summary and GC position
Added ‘bad_oc’ column to identify entries likely to be not OCs
Added Froebrich et al. (2007)
Updated a few entries that were identified as duplicates

Version 251022

Added UTI (UCC Trust Index)
Updated the main names of several entries

Version 250821

Add Hu & Soubiran (2025)

Version 250814

Fix missing OCs with shared members

Version 250811

Version 250204

Added Borissova et al. (2018)
Added Borissova et al. (2011)

Version 250131

Added Glushkova et al. (2010)
Added Chen et al. (2003)
Added Rv parameter to Dias (2021) entries

Version 241106

Added Dambis (1999).

Version 241102

Added NGC 5999 in FERREIRA19 that was not included in the initial release
Removed plx column that I added to SIM19 in the initial version of the UCC and it’s not part of the original dataset

Version 241101

Added Cavallo et al. (2024).

Version 240511

Added Donor et al. (2020)

Version 240304

Added Koposov et al. (2008)
Added Bossini et al. (2019)

Version 240207

Fixed Issue 12

Added new OC Casado-Hendy 1

Fixed Issue 41

Added Perren et al. (2022)

Version 231105

Fixed Issue 32

The original Santos-Silva et al. (2021) database used only included the five new OCs. The new database used contains the 15 OCs listed in Table 2 of the article.

Fixed Issue 31

Updated Hunt & Reffert database to include Theia objects labeled as OCs.

Fixed Issue 30

Add + sign to the declination for the CDS search coordinates.

Version 231025

Fixed Issue 1

Added He et al. (2023) database.

Fixed Issue 28

The duplicate probabilities using membership data are now properly estimated.

Version 231020

Fixed Issue 24

The original table JAEHNIG21 (taken from the PDF) only contained the 11 newly discovered candidate OCs. The new table from CDS contains info on the 431 OCs.

New OC added –> Pismis 24
Markarian 18 –> Added Collinder 205 to the naming
NGC 1976 –> Trapezium
NGC 2451 –> NGC 2451B (correct OC given the coordinates)
Removed Berkeley 42 –> GC NGC 6749
Fixed Issue 18

Melotte 20: added Collinder 39 to KHARCHENKO12

Fixed Issue 25

Changed the name of 91 OCs in LOKTIN17 to add a space before the numbering

Version 231017

Fixed Issue 23

Removed entries for Trapezium-FG (DIAS21), NGC1976 (LOKTIN17), and OC 0345 (HAO22) from the (old) UCC database
LOKTIN17: NGC 1976 –> Trapezium (NGC 1976 is the designation for the nebula)
DIAS21: Trapezium-FG –> Trapezium, Ori Trapezium
Re-generate entries for: Trapezium and OC 0345

Fixed Issue 17

Removed entries for NGC 2421 and NGC 2215 from the (old) UCC database
In LOKTIN17: Melotte 67 & Melotte 45 –> Messier 67 & Messier 45
Re-generate entries for: NGC 2421, NGC 2682, NGC 2215, Pleiades (Melotte 22)

Version 230810

Initial release of the catalogue, accompanied with the article published in MNRAS.