Pismis 8

(MWSC 1533; FoF 2088)

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0.95 UTI
0.74
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 98
Stellar density (N50/rad) 10.7 [N/pc2]
C3 classification AA
  • CN 0.74 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Pismis 8 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below 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 absorption and mass parameters (see Parameters). It is very well-studied in the literature.

Note: This object shares a very small percentage of members with 3 later reported entries. See table with shared members information.

Liu et al. (2025)
Classified as primordial binary cluster 330 along with Pismis_6.

Palma et al. (2025)
Classified as genetic pair P164, along with Pismis_6.

Cavallo et al. (2024)
Gold sample.

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

Data
🔍 Search references for Pismis 8 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 130.391 -46.274 0.537 -5.713 4.986 –
Almeida et al. 2025 130.409 -46.271 – – – –
Hunt & Reffert 2024 130.404 -46.263 0.533 -5.672 4.981 –
Cavallo et al. 2024 130.408 -46.267 0.533 – – –
Hunt & Reffert 2023 130.404 -46.263 0.533 -5.672 4.981 –
Almeida et al. 2023 130.413 -46.272 – – – –
Just et al. 2023 130.41 -46.264 – – – –
Jaehnig et al. 2021 130.398 -46.275 0.554 -5.743 4.973 –
Rain et al. 2021 130.407 -46.272 0.517 -5.757 4.945 –
Richer et al. 2021 130.406 -46.269 0.521 -5.698 4.926 –
Dias et al. 2021 130.409 -46.271 0.514 -5.726 4.912 –
Cantat-Gaudin et al. 2020 130.407 -46.272 0.517 -5.757 4.945 –
Cantat-Gaudin & Anders 2020 130.407 -46.272 0.517 -5.757 4.945 –
Liu & Pang 2019 130.435 -46.288 0.506 -5.72 4.895 –
Cantat-Gaudin et al. 2018 130.407 -46.272 0.517 -5.757 4.945 –
Loktin & Popova 2017 130.395 -46.266 – -3.29 3.07 63.4
Kharchenko et al. 2016 130.41 -46.264 – – – –
Dias et al. 2014 130.4 -46.267 – – – 63.4
Kharchenko et al. 2013 130.414 -46.267 – -4.97 9.43 –
Bukowiecki et al. 2011 130.4 -46.276 – – – –
van den Bergh 2006 130.396 -46.273 – – – –
Dias et al. 2002 130.4 -46.267 – -3.29 3.07 63.4
Dambis 1999 130.396 -46.273 – – – –

💡 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– 1.78 2.19 1.1 27 0.088 250 0.62 0.0
Liu et al. 2025 2.98 0.69 – 22 – – – –
Almeida et al. 2025 1.76 2.08 – 14 – 262 – –
Hunt & Reffert 2024 – – – – – 219(1) – –
Cavallo et al. 2024 1.92 2.45 – 31 0.210 – – –
Hunt & Reffert 2023 1.89 2.16 1.10 47 – – – –
Almeida et al. 2023 1.75 2.23 – 14 -0.037 250(1) 0.62 –
Just et al. 2023 – – – 27 – 12 – –
Jaehnig et al. 2021 1.80(1) – – – – – – –
Rain et al. 2021 1.83 2.17 – 26 – – – 0
Richer et al. 2021 – 2.42 – – – – – –
Dias et al. 2021 1.76 2.08 – 14 -0.034 – – –
Cantat-Gaudin et al. 2020 1.91 1.58 – 32 – – – –
Cantat-Gaudin & Anders 2020 1.83 – – – – – – –
Liu & Pang 2019 – – – 47 0.500 – – –
Cantat-Gaudin et al. 2018 1.83 – – – – – – –
Loktin & Popova 2017 1.31 2.19 – 27 – – – –
Kharchenko et al. 2016 1.36 2.19 – 27 – – – –
Kharchenko et al. 2013 1.36 2.19 – 27 – – – –
Bukowiecki et al. 2012 – – – – – 254 – –
Bukowiecki et al. 2011 1.86(1) 2.26 – 32 – – – –
van den Bergh 2006 1.31 2.20 – 27 – – – –
Dias et al. 2002 1.31 2.19 – 27 – – – –
Dambis 1999 1.41 2.24 – 32 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
FoF 58 9.2 129.9 -46.29 0.54 -5.83 5.09 -1.51 0.14
OC 0484 8.2 130.25 -46.52 0.54 -5.74 5.05 41.74 0.11
OC 0482 7.1 130.27 -46.41 0.56 -5.79 5.1 – 0.13

💡 Note: The % column shows the percentage of members that Pismis 8 shares with each listed object.

Visualization
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Pismis 8 UCC
Pismis 8 HUNT23
Pismis 8 CANTAT20
Galactocentric position diagram