ESO 139 54

(MWSC 2799)

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0.15 UTI
0.0
CN
0.01
Cdens
0.12
CC3
0.31
Clit
1.0
Cdup
Nm (P>50%) 19
Core radius and density 9.5 [pc], 0.05 [pc-2]
C3 classification DC
  • CN 0.0 Sparse
  • Cdens 0.01 Very loose
  • CC3 0.12 Very low quality
  • Clit 0.31 Poorly studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
ESO 139 54 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate* distance, well below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~4.09 kpc) differs significantly from the median photometric distance (~1.71 kpc).

⚠ī¸ Warning: the low UTI value and no obvious signs of duplication (Cdup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Dias et al. (2022)
Likely not a real open cluster.

Data
🔍 Search references for ESO 139 54 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 271.112 -58.576 0.244 -2.471 -6.244 -47.443
Bica et al. 2019 271.166 -58.524 – – – –
Dib et al. 2018 271.155 -58.525 – – – –
Sampedro et al. 2017 271.171 -58.523 – -0.89 -5.01 –
Dias et al. 2014 271.171 -58.523 – -1.64 -4.16 -28.03
Bukowiecki et al. 2011 271.163 -58.578 – – – –
Dias et al. 2002 271.171 -58.523 – -2.2 -4.12 -28.03

💡 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– 1.71 1.025 – 1259 – 367 – –
Dib et al. 2018 0.98 – – 977 – – – –
Bukowiecki et al. 2012 – – – – – 367 – –
Bukowiecki et al. 2011 1.71(1) 1.01 – 1259 – – – –
Dias et al. 2002 1.71 1.04 – 1259 – – – –

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

Visualization
ℹī¸
ESO 139 54 UCC
Galactocentric position diagram