NGC 6530

(M8)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
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 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 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.

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.

Cavallo et al. (2024)
Bronze sample.

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

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
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 – – – –

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 1.03 2.36 5 0.000 1148 0.62 –
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 – – – –
Jaehnig et al. 2021 1.27(1) – – – – – – –
Richer et al. 2021 – 0.93 – – – – – –
Dias et al. 2021 1.21 1.16 – 5 0.373 – – –
Loktin & Popova 2017 1.32 1.00 – 8 – – – –
Morales et al. 2013 1.30 – – 2 – – – –
Gozha et al. 2012 1.33 – – 7 – 676 – –
Piskunov et al. 2008 1.32 0.93 – 5 – – – –
van den Bergh 2006 1.33 1.02 – 7 – – – –
Kharchenko et al. 2005 1.32 0.93 – 5 – – – –
Lada & Lada 2003 1.80 – – – – – – –
Kharchenko et al. 2003 1.33 0.87 – – – – – –
Chen et al. 2003 1.33 – – 0 – – – –
Dias et al. 2002 1.33 1.03 – 7 – – – –
Dambis 1999 1.27 1.05 – 3 – – – –

(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
Hourglass Nebula 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