ESO 064 05

(MWSC 2026)

0.36 UTI

0.28

C_N

0.24

C_dens

0.62

C_C3

0.32

C_lit

1.0

C_dup

N_m (P>50%) 28

Core radius and density 1.6 [pc], 1.2 [pc^-2]

C3 classification AC

C_N 0.28 Poorly populated
C_dens 0.24 Very loose
C_C3 0.62 Intermediate quality
C_lit 0.32 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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ESO 064 05 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a metal-poor, young cluster (see Parameters). It is poorly studied in the literature.

Relatively close Low extinction Metal-poor Young

Liu et al. (2025)
Classified as primordial binary cluster 11 along with ASCC_71.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P186, along with ASCC_71.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Data

🔍 Search references for ESO 064 05 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–	186.182	-68.451	0.782	-9.067	-1.464	-13.623
Hunt & Reffert	2024	186.148	-68.436	0.787	-9.062	-1.459	-11.231
Cavallo et al.	2024	186.165	-68.472	0.792	–	–	–
Hunt & Reffert	2023	186.148	-68.436	0.787	-9.062	-1.459	-11.231
Just et al.	2023	186.171	-68.482	–	–	–	–
Dias et al.	2018	–	–	–	-7.0	-1.01	–
Dib et al.	2018	186.18	-68.485	–	–	–	–
Sampedro et al.	2017	186.137	-68.467	–	-6.97	4.44	–
Joshi et al.	2016	186.18	-68.485	–	–	–	–
Kharchenko et al.	2016	186.171	-68.482	–	–	–	–
Dias et al.	2014	186.137	-68.467	–	-6.76	4.3	–
Kharchenko et al.	2013	186.18	-68.485	–	-8.52	1.67	–

💡 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–	1.24	0.79	0.28	77	-0.590	88	–	–
Liu et al.	2025	1.53	0.21	–	112	–	–	–	–
Hunt & Reffert	2024	1.22	0.49	0.28	98	–	90⁽¹⁾	–	–
Cavallo et al.	2024	1.02	0.79	–	132	-0.590	–	–	–
Hunt & Reffert	2023	1.22	0.49	0.28	98	–	–	–	–
Just et al.	2023	–	–	–	77	–	86	–	–
Dib et al.	2018	1.24	–	–	77	–	–	–	–
Joshi et al.	2016	1.24	1.31	–	77	–	–	–	–
Kharchenko et al.	2016	1.24	1.31	–	77	–	–	–	–
Kharchenko et al.	2013	1.24	1.31	–	77	–	–	–	–

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

Visualization

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