NGC 6603

(Melotte 197; Collinder 374; MWSC 2883; OCL 36; FSR 0045)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 829
Stellar density (N50/rad) 196.1 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
πŸ“₯ Members πŸ“Š Colab πŸ”¬ Bayestar19 MOCAMOCA πŸ” CDS πŸ” Simbad πŸ” CDS (Ξ±, Ξ΄) πŸ” Simbad (Ξ±, Ξ΄)

Overview
ℹ️
NGC 6603 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Note: This object shares a very small percentage of members with a later reported entry. See table with shared members information.

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.86 (50th percentile).

Rain et al. (2021)
The parameter log(t) was selected from Netopil et al. (2015A&A...582A..19N). This object probably suffers from differential reddening, we suggest exploring this effect in future works.

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.

Data
πŸ” Search references for NGC 6603 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 274.612 -18.411 0.325 0.141 -2.059 18.504
Almeida et al. 2025 274.614 -18.409 – – – –
Hunt & Reffert 2024 274.613 -18.409 0.326 0.147 -2.054 16.931
Cavallo et al. 2024 274.615 -18.41 0.327 – – –
Hunt & Reffert 2023 274.613 -18.409 0.326 0.147 -2.054 16.931
Just et al. 2023 274.597 -18.431 – – – –
Jaehnig et al. 2021 274.617 -18.41 0.347 0.108 -2.036 –
Rain et al. 2021 274.616 -18.409 0.324 0.119 -2.042 –
Dias et al. 2021 274.614 -18.409 0.323 0.129 -2.032 18.146
Cantat-Gaudin et al. 2020 274.616 -18.409 0.324 0.119 -2.042 –
SΓ‘nchez et al. 2020 274.608 -18.407 – 0.143 -2.131 –
Cantat-Gaudin & Anders 2020 274.616 -18.409 0.324 0.119 -2.042 –
Soubiran et al. 2018 274.616 -18.409 – – – 17.91
Bica et al. 2019 274.603 -18.404 – – – –
Cantat-Gaudin et al. 2018 274.616 -18.409 0.324 0.119 -2.042 –
Kharchenko et al. 2016 274.597 -18.431 – – – –
Dias et al. 2014 274.608 -18.407 – 1.06 -0.74 –
Kharchenko et al. 2013 274.605 -18.43 – -1.28 -2.86 21.3
Morales et al. 2013 274.608 -18.407 – – – –
Gozha et al. 2012 274.608 -18.407 – – – –
Bukowiecki et al. 2011 274.617 -18.409 – – – –
Piskunov et al. 2008 274.597 -18.435 – – – –
Ahumada & Lapasset 2007 274.6 -18.4 – – – –
van den Bergh 2006 274.6 -18.433 – – – –
Kharchenko et al. 2005 274.6 -18.43 – 0.85 0.93 –
Kharchenko et al. 2003 274.56 -18.45 – 0.95 0.66 –
Dias et al. 2002 274.608 -18.407 – 1.06 -0.72 21.34
Lynga 1987 274.621 -18.413 – – – –
Sulentic et al. 1973 274.617 -18.406 – – – –

πŸ’‘ Note: The UCC values are estimated from its identified members.

Reference Year Dist [kpc] Av [mag] DAv [mag] Age [Myr] [Fe/H] [dex] Mass [Msun] Bfrac BSS
UCC 99999– 2.83 2.49 2.39 214 0.153 2560 – 4
Almeida et al. 2025 2.07 2.00 – 445 – 2560 – –
Hunt & Reffert 2024 – – – – – 10158(1) – –
Cavallo et al. 2024 1.67 3.37 – 209 -1.250 – – –
Hunt & Reffert 2023 2.82 2.65 2.39 161 – – – –
Just et al. 2023 – – – 251 – 552 – –
Jaehnig et al. 2021 2.89(1) – – – – – – –
Rain et al. 2021 2.83 2.49 – 562 – – – 4
Dias et al. 2021 2.07 2.00 – 445 0.153 – – –
Cantat-Gaudin et al. 2020 2.73 1.63 – 219 – – – –
Kounkel et al. 2020 2.94 2.52 – 309 – – – –
Cantat-Gaudin & Anders 2020 2.83 – – – – – – –
Soubiran et al. 2018 2.83 – – – – – – –
Cantat-Gaudin et al. 2018 2.83 – – – – – – –
Kharchenko et al. 2016 2.33 2.63 – 251 – – – –
Kharchenko et al. 2013 2.33 2.63 – 251 – – – –
Morales et al. 2013 3.60 – – 200 – – – –
Bukowiecki et al. 2012 – – – – – 289 – –
Gozha et al. 2012 3.60 – – 200 – 5012 – –
Bukowiecki et al. 2011 1.91(1) 1.89 – 562 – – – –
Piskunov et al. 2008 2.88 1.58 – 63 – – – –
Ahumada & Lapasset 2007 – 2.49 – 200 – – – 3
van den Bergh 2006 3.60 2.49 – 200 – – – –
Kharchenko et al. 2005 2.88 1.58 – 63 – – – –
Kharchenko et al. 2003 2.88 1.89 – – – – – –
Dias et al. 2002 3.60 2.49 – 200 0.430 – – –
Lynga 1987 2.88 1.64 – – – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
OC 0022 1.0 274.6 -18.38 0.54 -0.01 -1.98 – 0.1

πŸ’‘ Note: The % column shows the percentage of members that NGC 6603 shares with each listed object.

Visualization
ℹ️
NGC 6603 UCC
NGC 6603 HUNT23
NGC 6603 CANTAT20
Galactocentric position diagram