Pismis 27

(MWSC 780)

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0.83 UTI
0.75
CN
1.0
Cdens
0.75
CC3
1.0
Clit
0.92
Cdup
C3 classification AB
Number of members (P>50%) 112
Radius (P>50% members) 6.4 [arcmin]
  • CN 0.75 Rich
  • Cdens 1.0 Very dense
  • CC3 0.75 High quality
  • Clit 1.0 Very well-studied
  • Cdup 0.92 Very likely unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
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Pismis 27 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is very well-studied in the literature.

Note: This is very likely a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Silver sample.

Data
🔍 Search references for Pismis 27 in: SciX Simbad
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Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC – 92.726 20.618 0.508 -0.187 -2.048 32.501
Almeida et al. 2025 92.72 20.622 – – – –
Zhang et al. 2024 92.726 20.62 – – – –
Hunt & Reffert 2024 92.726 20.62 0.512 -0.237 -2.097 -7.869
Celli et al. 2024 92.719 20.617 – – – –
Cavallo et al. 2024 92.765 20.618 0.512 – – –
Hunt & Reffert 2023 92.726 20.62 0.512 -0.237 -2.097 -7.869
Almeida et al. 2023 92.717 20.62 – – – –
Just et al. 2023 92.721 20.616 – – – –
Dias et al. 2021 92.72 20.622 0.485 -0.14 -1.988 –
Cantat-Gaudin et al. 2020 92.719 20.617 0.504 -0.14 -1.994 –
Cantat-Gaudin & Anders 2020 92.719 20.617 0.504 -0.14 -1.994 –
Cantat-Gaudin et al. 2018 92.719 20.617 0.504 -0.14 -1.994 –
Loktin & Popova 2017 92.73 20.607 – 0.044 -1.939 –
Kharchenko et al. 2016 92.721 20.616 – – – –
Kharchenko et al. 2013 92.73 20.615 – 0.98 -4.03 –
Glushkova et al. 2010 92.724 20.607 – – – –
Dias et al. 2002 92.725 20.607 – -5.7 24.77 –

💡 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] Bfr BSS
Almeida et al. 2025 1.74 1.83 – 9 – 272 – –
Zhang et al. 2024 – – – – 0.182* – – –
Hunt & Reffert 2024 – – – – – 191* – –
Celli et al. 2024 – – – 5 – 212 – –
Cavallo et al. 2024 1.68 1.87 – 35 -0.100 – – –
Hunt & Reffert 2023 1.83 1.68 2.02 11 – – – –
Almeida et al. 2023 1.76 2.16 – 9 -0.098 205* 0.75 –
Just et al. 2023 – – – 178 – 45 – –
Dias et al. 2021 1.74 1.83 – 9 0.101 – – –
Cantat-Gaudin et al. 2020 1.89 1.50 – 5 – – – –
Cantat-Gaudin & Anders 2020 1.88 – – – – – – –
Cantat-Gaudin et al. 2018 1.88 – – – – – – –
Loktin & Popova 2017 2.49 1.74 – 85 – – – –
Kharchenko et al. 2016 1.66 1.87 – 178 – – – –
Kharchenko et al. 2013 1.66 1.87 – 178 – – – –
Glushkova et al. 2010 1.00 2.11 – 50 – – – –
Dias et al. 2002 1.00 2.11 – 50 – – – –

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
NGC 2175 8.0 92.4 20.6 0.5 0.29 -2.26 23.04 0.78

💡 Note: The % column shows the percentage of members that Pismis 27 shares with each listed object.

Visualization
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Pismis 27 UCC
Pismis 27 HUNT23
Pismis 27 CANTAT20
Galactocentric position diagram