Pismis 20

(MWSC 2281)

0.96 UTI

0.79

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 219

Stellar density (N₅₀/rad) 27.8 [N/pc²]

C3 classification AA

C_N 0.79 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

MOCA 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Pismis 20 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close High extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for Pismis 20 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	99999–	228.855	-59.072	0.301	-3.897	-2.905	-7.66
Almeida et al.	2025	228.844	-59.08	–	–	–	–
Hunt & Reffert	2024	228.853	-59.071	0.302	-3.957	-2.942	-19.54
Cavallo et al.	2024	228.811	-59.121	0.303	–	–	–
Hunt & Reffert	2023	228.853	-59.071	0.302	-3.957	-2.942	-19.54
Just et al.	2023	228.834	-59.065	–	–	–	–
Jaehnig et al.	2021	228.845	-59.069	0.331	-3.862	-2.906	–
Rain et al.	2021	228.848	-59.073	0.291	-3.831	-2.911	–
Dias et al.	2021	228.844	-59.08	0.289	-3.834	-2.9	–
Cantat-Gaudin et al.	2020	228.848	-59.073	0.291	-3.831	-2.911	–
Sánchez et al.	2020	228.846	-59.067	–	-3.684	-2.714	–
Cantat-Gaudin & Anders	2020	228.848	-59.073	0.291	-3.831	-2.911	–
Soubiran et al.	2018	228.848	-59.073	–	–	–	-76.71
Cantat-Gaudin et al.	2018	228.848	-59.073	0.291	-3.831	-2.911	–
Loktin & Popova	2017	228.84	-59.068	–	-4.502	-6.286	-69.6
Kharchenko et al.	2016	228.834	-59.065	–	–	–	–
Dias et al.	2014	228.846	-59.067	–	-5.33	-5.57	–
Kharchenko et al.	2013	228.846	-59.067	–	-2.7	-0.38	-69.6
Gozha et al.	2012	228.846	-59.067	–	–	–	–
Kharchenko et al.	2007	228.96	-59.38	–	0.0	–	–
van den Bergh	2006	228.85	-59.067	–	–	–	–
Dias et al.	2002	228.846	-59.067	–	-5.3	-5.62	-49.0
Dambis	1999	228.846	-59.067	–	–	–	–

💡 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]	B_frac	BSS
UCC	99999–	2.97	3.65	3.06	7	0.155	1170	–	0.0
Almeida et al.	2025	2.97	3.25	–	7	–	1170	–	–
Hunt & Reffert	2024	–	–	–	–	–	3995⁽¹⁾	–	–
Cavallo et al.	2024	2.84	3.76	–	17	0.520	–	–	–
Hunt & Reffert	2023	3.03	3.85	3.06	22	–	–	–	–
Just et al.	2023	–	–	–	32	–	80	–	–
Jaehnig et al.	2021	3.10⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.13	3.97	–	7	–	–	–	0
Dias et al.	2021	2.97	3.25	–	7	0.155	–	–	–
Cantat-Gaudin & Anders	2020	3.13	–	–	–	–	–	–	–
Soubiran et al.	2018	3.13	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.13	–	–	–	–	–	–	–
Loktin & Popova	2017	2.03	3.65	–	7	–	–	–	–
Kharchenko et al.	2016	1.50	3.55	–	32	–	–	–	–
Kharchenko et al.	2013	1.50	3.55	–	32	–	–	–	–
Gozha et al.	2012	2.02	–	–	7	0.030	–	–	–
van den Bergh	2006	2.02	3.66	–	7	–	–	–	–
Dias et al.	2002	3.27	3.97	–	7	–	–	–	–
Dambis	1999	2.64	3.63	–	3	–	–	–	–

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

Visualization

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