ESO 311 21

(MWSC 1415)

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0.69 UTI
0.83
CN
0.82
Cdens
0.62
CC3
0.58
Clit
1.0
Cdup
Nm (P>50%) 307
Core radius and density 2.4 [pc], 4.1 [pc-2]
C3 classification AC
  • CN 0.83 Rich
  • Cdens 0.82 Dense
  • CC3 0.62 Intermediate quality
  • Clit 0.58 Moderately 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
ESO 311 21 is a rich, dense object of intermediate C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster (see Parameters). It is moderately studied in the literature.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.88 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.88 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1981, e_all=0.1391.

Data
πŸ” Search references for ESO 311 21 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 120.415 -41.598 0.192 -2.813 5.526 66.409
Hu & Soubiran 2025 120.421 -41.592 – – – –
Hunt & Reffert 2024 120.428 -41.593 0.193 -2.804 5.528 65.881
Cavallo et al. 2024 120.421 -41.592 0.182 – – –
Hunt & Reffert 2023 120.428 -41.593 0.193 -2.804 5.528 65.881
Just et al. 2023 120.42 -41.581 – – – –
Jadhav & Subramaniam 2021 120.415 -41.596 – – – –
Cantat-Gaudin et al. 2020 120.415 -41.596 0.16 -2.852 5.51 –
SΓ‘nchez et al. 2020 120.425 -41.599 – -2.962 5.54 –
Cantat-Gaudin & Anders 2020 120.415 -41.596 0.16 -2.852 5.51 –
Soubiran et al. 2018 120.415 -41.596 – – – 79.59
Bica et al. 2019 120.439 -41.602 – – – –
Cantat-Gaudin et al. 2018 120.415 -41.596 0.16 -2.852 5.51 –
Dias et al. 2018 – – – -3.87 4.41 –
Sampedro et al. 2017 120.425 -41.599 – 0.77 7.2 –
Kharchenko et al. 2016 120.42 -41.581 – – – –
Kharchenko et al. 2013 120.424 -41.583 – -8.69 6.28 –
Bukowiecki et al. 2011 120.421 -41.598 – – – –
Glushkova et al. 2010 120.423 -41.599 – – – –
Dias et al. 2002 120.425 -41.599 – -14.99 10.24 –

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– 5.12 1.88 0.83 2344 -0.190 1916 – 0
Hu & Soubiran 2025 – – – – -0.200(5) – – –
Hunt & Reffert 2024 4.53 1.88 0.83 2503 – 1916(1) – –
Cavallo et al. 2024 4.55 2.58 – 2188 -0.180 – – –
Hunt & Reffert 2023 4.54 1.88 0.83 2500 – – – –
Just et al. 2023 – – – 1995 – 1683 – –
Jadhav & Subramaniam 2021 5.45 1.83 – 2570 – 3762 – 0(1)
Cantat-Gaudin et al. 2020 5.45 1.83 – 2570 – – – –
Kounkel et al. 2020 3.94 2.47 – 1585 – – – –
Cantat-Gaudin & Anders 2020 5.30 – – – – – – –
Soubiran et al. 2018 5.30 – – – – – – –
Cantat-Gaudin et al. 2018 5.30 – – – – – – –
Kharchenko et al. 2016 5.12 2.50 – 1995 – – – –
Kharchenko et al. 2013 5.12 2.50 – 1995 – – – –
Bukowiecki et al. 2011 10.49(1) 1.55 – 1122 – – – –
Glushkova et al. 2010 2.33 1.55 – 12589 – – – –
Dias et al. 2002 2.33 1.55 – 12589 – – – –

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

Visualization
ℹ️
ESO 311 21 UCC
ESO 311 21 HUNT23
ESO 311 21 CANTAT20
Galactocentric position diagram