NGC 6530

(M8)

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0.91 UTI
1.0
CN
1.0
Cdens
0.75
CC3
0.91
Clit
1.0
Cdup
N50 (P>50% members) 616
Stellar density (N50/rad) 264.0 [N/pc2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 0.91 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 6530 is a very rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a significant percentage of members with 2 later reported entries. See table with shared members information.

Palma et al. (2025)
Part of multiple system G203, along with ESO_521-38, UBC_94, HSC_94 and Collinder_367.

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

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.43 (50th percentile).

Morales et al. (2013)
Classified as morphological type 'OC0' (emerging exposed cluster). Morphological flag: one or a few submm emission within the cluster area, but the submm emission is likely associated to the cluster, presence of emission related to PAH or warm dust.

Ahumada & Lapasset (2007)
Selected angular diameter from (1987, Lund Catalogue of Open Cluster Data).

Lada & Lada (2003)
Embedded cluster within ∼2 Kpc of the Sun.

Data
πŸ” Search references for NGC 6530 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 271.102 -24.37 0.762 1.286 -2.052 0.143
Wei et al. 2025 271.098 -24.351 0.775 1.409 -2.005 –
Almeida et al. 2025 271.109 -24.357 – – – –
Hunt & Reffert 2024 271.102 -24.37 0.764 1.333 -2.058 5.957
Cavallo et al. 2024 271.053 -24.351 0.764 – – –
Hunt & Reffert 2023 271.102 -24.37 0.764 1.333 -2.058 5.957
Jaehnig et al. 2021 271.091 -24.372 0.788 1.321 -2.038 –
Richer et al. 2021 271.111 -24.373 0.753 1.282 -2.028 –
Dias et al. 2021 271.109 -24.357 0.762 1.375 -1.992 –
SΓ‘nchez et al. 2020 271.129 -24.358 – 1.48 -1.938 –
Loktin & Popova 2017 271.125 -24.359 – 0.988 -1.915 -6.5
Dias et al. 2014 271.129 -24.358 – 0.35 -2.11 –
Morales et al. 2013 271.129 -24.358 – – – –
Gozha et al. 2012 271.129 -24.358 – – – –
Piskunov et al. 2008 271.111 -24.364 – – – –
Kharchenko et al. 2007 271.12 -24.36 – 0.25 – -6.49
Ahumada & Lapasset 2007 271.125 -24.367 – – – –
van den Bergh 2006 271.125 -24.367 – – – –
Kharchenko et al. 2005 271.12 -24.36 – 2.01 -1.81 -13.32
Lada & Lada 2003 271.966 -24.326 – – – –
Kharchenko et al. 2003 271.09 -24.36 – 2.11 -3.68 –
Chen et al. 2003 271.204 -24.377 – 0.58 -2.09 -30.0
Dias et al. 2002 271.129 -24.358 – 0.58 -2.09 -4.21
Dambis 1999 271.129 -24.358 – – – –
Lynga 1987 271.182 -24.331 – – – -11.0
Sulentic et al. 1973 271.184 -24.331 – – – –

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– 1.32 1.04 2.36 5 -0.025 1148 0.62 0
Wei et al. 2025 1.70 1.66 – 7 0.000 1620 0.62 –
Almeida et al. 2025 1.21 1.16 – 5 – 328 – –
Hunt & Reffert 2024 – – – – – 2336(1) – –
Cavallo et al. 2024 1.30 1.50 – 7 -0.050 – – –
Hunt & Reffert 2023 1.24 1.48 2.36 4 – – – –
Spina et al. 2022 – – – – -0.062 – – –
Jaehnig et al. 2021 1.27(1) – – – – – – –
Richer et al. 2021 – 0.95 – – – – – –
Dias et al. 2021 1.21 1.16 – 5 0.373 – – –
Loktin & Popova 2017 1.32 1.02 – 8 – – – –
Morales et al. 2013 1.30 – – 2 – – – –
Gozha et al. 2012 1.33 – – 7 – 676 – –
Piskunov et al. 2008 1.32 0.95 – 5 – – – –
Ahumada & Lapasset 2007 – 1.04 – 7 – – – 0
van den Bergh 2006 1.33 1.04 – 7 – – – –
Kharchenko et al. 2005 1.32 0.95 – 5 – – – –
Lada & Lada 2003 1.80 – – – – – – –
Kharchenko et al. 2003 1.33 0.88 – – – – – –
Chen et al. 2003 1.33 – – 0 – – – –
Dias et al. 2002 1.33 1.05 – 7 – – – –
Dambis 1999 1.27 1.07 – 3 – – – –
Lynga 1987 1.60 0.95 – 2 – – – –

(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 0006 62.3 271.1 -24.37 0.76 1.28 -2.07 4.25 0.0
BDSB 1 20.6 271.01 -24.38 0.76 1.38 -2.2 19.01 0.17

πŸ’‘ Note: The % column shows the percentage of members that NGC 6530 shares with each listed object.

Visualization
ℹ️
NGC 6530 UCC
NGC 6530 HUNT23
Galactocentric position diagram