NGC 5381

(Ruprecht 109; VDBH 156; MWSC 2196; OCL 915; vdBergh-Hagen 156; ESO 133 11)

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0.93 UTI
1.0
CN
1.0
Cdens
1.0
CC3
0.83
Clit
1.0
Cdup
N50 (P>50% members) 697
Stellar density (N50/rad) 38.3 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.83 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 5381 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above 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 metallicity and mass parameters (see Parameters). It is well-studied in the literature.

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: good fit. Gold sample.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data
πŸ” Search references for NGC 5381 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 210.222 -59.576 0.389 -6.062 -2.924 -38.09
Li et al. 2025 210.205 -59.578 0.379 -6.034 -2.932 –
Hu & Soubiran 2025 210.226 -59.581 – – – –
Almeida et al. 2025 210.196 -59.582 – – – –
Hunt & Reffert 2024 210.22 -59.578 0.39 -6.073 -2.919 -29.414
Cavallo et al. 2024 210.226 -59.581 0.39 – – –
Hunt & Reffert 2023 210.22 -59.578 0.39 -6.073 -2.919 -29.414
Just et al. 2023 210.153 -59.602 – – – –
Jadhav & Subramaniam 2021 210.205 -59.578 – – – –
Dias et al. 2021 210.196 -59.582 0.379 -6.034 -2.921 -38.379
Cantat-Gaudin et al. 2020 210.205 -59.578 0.379 -6.034 -2.932 –
SΓ‘nchez et al. 2020 210.171 -59.587 – -6.161 -2.888 –
Cantat-Gaudin & Anders 2020 210.205 -59.578 0.379 -6.034 -2.932 –
Soubiran et al. 2018 210.205 -59.578 – – – -38.61
Bica et al. 2019 210.151 -59.594 – – – –
Cantat-Gaudin et al. 2018 210.205 -59.578 0.379 -6.034 -2.932 –
Kharchenko et al. 2016 210.153 -59.602 – – – –
Tadross 2014 210.171 -59.587 – – – –
Dias et al. 2014 210.171 -59.587 – -1.77 -4.92 –
Kharchenko et al. 2013 210.165 -59.605 – -5.45 0.7 –
Dias et al. 2002 210.171 -59.587 – -1.77 -4.92 –
Lynga 1987 210.154 -59.562 – – – –
van den Bergh & Hagen 1975 209.275 -59.317 – – – –
Sulentic et al. 1973 210.138 -59.554 – – – –

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– 2.34 1.615 1.58 447 0.187 2563 – 0
Li et al. 2025 2.34 1.47 – 533 0.254 – – –
Hu & Soubiran 2025 – – – – -0.160(5) – – –
Almeida et al. 2025 2.07 1.61 – 504 – 2055 – –
Hunt & Reffert 2024 – – – – – 4167(1) – –
Cavallo et al. 2024 2.02 1.53 – 646 0.220 – – –
Hunt & Reffert 2023 2.32 1.63 1.58 253 – – – –
Just et al. 2023 – – – 447 – 218 – –
Jadhav & Subramaniam 2021 2.34 1.62 – 355 – 3071 – 0(1)
Dias et al. 2021 2.07 1.61 – 504 0.154 – – –
Cantat-Gaudin et al. 2020 2.34 1.62 – 355 – – – –
Kounkel et al. 2020 2.61 1.90 – 389 – – – –
Cantat-Gaudin & Anders 2020 2.45 – – – – – – –
Soubiran et al. 2018 2.45 – – – – – – –
Cantat-Gaudin et al. 2018 2.45 – – – – – – –
Kharchenko et al. 2016 1.95 1.97 – 447 – – – –
Tadross 2014 1.17 0.19 – 1600 – – – –
Kharchenko et al. 2013 1.95 1.97 – 447 – – – –
Dias et al. 2002 2.63 1.45 – 251 – – – –

(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 0605 3.6 210.32 -59.58 0.46 -6.03 -2.9 -40.33 0.0

πŸ’‘ Note: The % column shows the percentage of members that NGC 5381 shares with each listed object.

Visualization
ℹ️
NGC 5381 UCC
NGC 5381 HUNT23
NGC 5381 CANTAT20
Galactocentric position diagram