Pismis 2

(VDBH 25; MWSC 1465; OCL 733; vdBergh-Hagen 25; ESO 312 02; FSR 1392)

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0.89 UTI
1.0
CN
1.0
Cdens
0.75
CC3
0.84
Clit
1.0
Cdup
Nm (P>50%) 1029
Core radius and density 1.3 [pc], 49 [pc-2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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
Pismis 2 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as an extremely massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the absorption and mass parameters (see Parameters). It is well-studied in the literature.

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

Note: This object shares a very small percentage of members with 2 later reported entries. See table with shared members information.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.80 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.0384, e_all=0.044.

Ahumada & Lapasset (2007)
Only straggler candidates inside a radius of 3' around the centre of coordinates have been considered.

Data
πŸ” Search references for Pismis 2 in: SciX Simbad
ℹ️
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 124.478 -41.672 0.246 -4.708 5.357 60.066
Hu & Soubiran 2025 124.483 -41.673 – – – –
Hunt & Reffert 2024 124.475 -41.672 0.243 -4.705 5.373 59.618
Cavallo et al. 2024 124.483 -41.673 0.243 – – –
Hunt & Reffert 2023 124.475 -41.672 0.243 -4.705 5.373 59.618
Just et al. 2023 124.486 -41.667 – – – –
Jadhav & Subramaniam 2021 124.477 -41.674 – – – –
Jaehnig et al. 2021 124.478 -41.675 0.223 -4.783 5.351 –
Rain et al. 2021 124.477 -41.674 0.221 -4.756 5.325 –
Cantat-Gaudin et al. 2020 124.477 -41.674 0.221 -4.756 5.325 –
SΓ‘nchez et al. 2020 124.475 -41.667 – -4.837 5.518 –
Cantat-Gaudin & Anders 2020 124.477 -41.674 0.221 -4.756 5.325 –
Soubiran et al. 2018 124.477 -41.674 – – – 58.99
Bica et al. 2019 124.483 -41.661 – – – –
Cantat-Gaudin et al. 2018 124.477 -41.674 0.221 -4.756 5.325 –
Sampedro et al. 2017 124.475 -41.667 – -5.88 1.82 –
Kharchenko et al. 2016 124.486 -41.667 – – – –
Netopil et al. 2016 124.491 -41.67 – – – –
Dias et al. 2014 124.475 -41.667 – -5.72 0.89 –
Kharchenko et al. 2013 124.491 -41.67 – -4.63 6.78 49.0
Gozha et al. 2012 124.475 -41.667 – – – –
Bukowiecki et al. 2011 124.483 -41.669 – – – –
Kharchenko et al. 2007 124.47 -41.67 – 0.03 – –
Ahumada & Lapasset 2007 124.475 -41.667 – – – –
van den Bergh 2006 124.479 -41.672 – – – –
Dias et al. 2002 124.475 -41.667 – -5.72 0.89 -49.0
Lynga 1987 124.512 -41.622 – – – –
van den Bergh & Hagen 1975 124.075 -41.45 – – – –

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– 3.805 3.71 2.25 1148 -0.070 11091 – 5
Hu & Soubiran 2025 – – – – -0.180(5) – – –
Hunt & Reffert 2024 3.49 4.66 2.25 561 – 11091(1) – –
Cavallo et al. 2024 3.34 4.41 – 1023 -0.360 – – –
Hunt & Reffert 2023 3.49 4.66 2.25 561 – – – –
Just et al. 2023 – – – 1135 – 1380 – –
Jadhav & Subramaniam 2021 4.07 3.32 – 1862 – 16152 – 5(1)
Jaehnig et al. 2021 4.59(1) – – – – – – –
Rain et al. 2021 4.00 0.16 – 1148 – – – 0
Cantat-Gaudin et al. 2020 4.07 3.32 – 1862 – – – –
Kounkel et al. 2020 3.62 3.71 – 1047 – – – –
Cantat-Gaudin & Anders 2020 4.00 – – – – – – –
Soubiran et al. 2018 4.00 – – – – – – –
Cantat-Gaudin et al. 2018 4.00 – – – – – – –
Kharchenko et al. 2016 2.75 4.07 – 1135 – – – –
Netopil et al. 2016 9.16 – – 1470 – – – –
Kharchenko et al. 2013 2.75 4.07 – 1135 -0.070 – – –
Gozha et al. 2012 3.31 – – 1148 -0.070 – – –
Bukowiecki et al. 2011 3.99(1) 3.19 – 1585 – – – –
Ahumada & Lapasset 2007 – 4.10 – 1148 – – – 46
van den Bergh 2006 3.31 0.16 – 1148 – – – –
Dias et al. 2002 3.31 0.16 – 1148 -0.070 – – –

(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 0455 3.3 124.48 -41.67 0.29 -4.7 5.37 61.15 0.0
OC 0456 2.4 124.49 -41.67 0.24 -4.69 5.37 60.83 0.0

πŸ’‘ Note: The % column shows the percentage of members that Pismis 2 shares with each listed object.

Visualization
ℹ️
Pismis 2 UCC
Pismis 2 HUNT23
Pismis 2 CANTAT20
Galactocentric position diagram