Dias 6

(BBD2004 2; MWSC 2932; BBD 5; FoF 291)

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0.91 UTI
0.87
CN
1.0
Cdens
1.0
CC3
0.84
Clit
1.0
Cdup
Nm (P>50%) 425
Core radius and density 1.2 [pc], 16 [pc-2]
C3 classification AA
  • CN 0.87 Rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.84 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
Dias 6 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, near 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 well-studied in the literature.

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

Palma et al. (2025)
Classified as optical pair P113, along with CWNU_2718.

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD classes: 0.29 (50th percentile), true positive? (human-assigned).

Hunt & Reffert (2023)
Classified as open cluster. CMD classes: 0.29 (50th percentile), true positive? (human-assigned).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.0583, e_all=0.0394.

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

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 Dias 6 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 277.617 -12.33 0.342 0.506 -0.59 5.51
Li et al. 2025 277.617 -12.33 0.331 0.482 -0.591 –
Hu & Soubiran 2025 277.62 -12.331 – – – –
Almeida et al. 2025 277.621 -12.333 – – – –
Hunt & Reffert 2024 277.615 -12.332 0.337 0.516 -0.582 3.534
Cavallo et al. 2024 277.62 -12.331 0.335 – – –
Hunt & Reffert 2023 277.615 -12.332 0.337 0.516 -0.582 3.534
Angelo et al. 2023 277.621 -12.326 – 0.52 -0.58 –
Just et al. 2023 277.627 -12.306 – – – –
Dias et al. 2022 277.617 -12.323 0.344 0.515 -0.587 4.654
Jadhav & Subramaniam 2021 277.617 -12.33 – – – –
Dias et al. 2021 277.621 -12.333 0.334 0.474 -0.588 2.188
Cantat-Gaudin et al. 2020 277.617 -12.33 0.331 0.482 -0.591 –
SΓ‘nchez et al. 2020 277.625 -12.316 – 0.435 -0.524 –
Cantat-Gaudin & Anders 2020 277.617 -12.33 0.331 0.482 -0.591 –
Liu & Pang 2019 277.617 -12.332 0.334 0.462 -0.605 –
Soubiran et al. 2018 277.617 -12.33 – – – 4.52
Bica et al. 2019 277.616 -12.316 – – – –
Cantat-Gaudin et al. 2018 277.617 -12.33 0.331 0.482 -0.591 –
Dib et al. 2018 277.635 -12.305 – – – –
Loktin & Popova 2017 277.62 -12.316 – -1.115 -2.737 –
Sampedro et al. 2017 277.625 -12.316 – -1.51 -0.78 –
Kharchenko et al. 2016 277.627 -12.306 – – – –
Tadross 2014 277.625 -12.316 – – – –
Dias et al. 2014 277.625 -12.316 – -1.04 -1.65 –
Kharchenko et al. 2013 277.635 -12.305 – 0.0 -3.18 –
Morales et al. 2013 277.625 -12.316 – – – –
Dias et al. 2002 277.625 -12.316 – -1.04 -1.65 –

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– 2.4 2.84 2.5 566 -0.068 1731 – 1
Li et al. 2025 1.92 2.86 – 960 -0.068 – – –
Hu & Soubiran 2025 – – – – -0.320(5) – – –
Almeida et al. 2025 2.40 2.80 – 566 – 1731 – –
Hunt & Reffert 2024 2.70 3.35 2.50 128 – 4732(1) – –
Cavallo et al. 2024 2.02 3.42 – 603 -0.080 – – –
Hunt & Reffert 2023 2.70 3.35 2.50 128 – – – –
Angelo et al. 2023 2.00 3.12 – 794 -0.060 7(1) – –
Just et al. 2023 – – – 398 – 755 – –
Dias et al. 2022 2.28(1) 2.77(1) – 676(1) 0.173(1) – – –
Jadhav & Subramaniam 2021 2.52 1.85 – 1096 – 2150 – 1(1)
Dias et al. 2021 2.40 2.80 – 566 0.174 – – –
Cantat-Gaudin et al. 2020 2.52 1.85 – 1096 – – – –
Kounkel et al. 2020 2.72 3.04 – 407 – – – –
Cantat-Gaudin & Anders 2020 2.78 – – – – – – –
Liu & Pang 2019 – – – 1230 -2.000 – – –
Soubiran et al. 2018 2.78 – – – – – – –
Cantat-Gaudin et al. 2018 2.78 – – – – – – –
Dib et al. 2018 1.92 – – 398 – – – –
Loktin & Popova 2017 4.70 3.17 – 100 – – – –
Kharchenko et al. 2016 1.92 2.82 – 398 – – – –
Tadross 2014 1.58 2.87 – 600 – – – –
Kharchenko et al. 2013 1.92 2.82 – 398 – – – –
Morales et al. 2013 2.19 – – 515 – – – –
Dias et al. 2002 2.24 2.74 – 708 – – – –

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

Visualization
ℹ️
Dias 6 UCC
Dias 6 HUNT23
Dias 6 CANTAT20
Galactocentric position diagram