ESO 275 01

(FSR 1723; MWSC 2335; MWSC 2334; FoF 1998)

0.83 UTI

0.8

C_N

1.0

C_dens

0.75

C_C3

0.81

C_lit

1.0

C_dup

N_m (P>50%) 236

Core radius and density 0.8 [pc], 33 [pc^-2]

C3 classification AB

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.81 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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ESO 275 01 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

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).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2151, e_all=0.1399.

Data

🔍 Search references for ESO 275 01 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–	238.776	-46.014	0.63	-0.246	-1.392	-22.6
Li et al.	2025	238.769	-46.014	0.642	-0.196	-1.395	–
Almeida et al.	2025	238.769	-46.013	–	–	–	–
Hunt & Reffert	2024	238.781	-46.011	0.625	-0.258	-1.399	-11.116
Cavallo et al.	2024	238.773	-46.015	0.627	–	–	–
Hunt & Reffert	2023	238.781	-46.011	0.625	-0.258	-1.399	-11.116
Almeida et al.	2023	238.776	-46.014	–	–	–	–
Just et al.	2023	238.766	-46.009	–	–	–	–
Dias et al.	2022	238.774	-46.013	0.628	-0.253	-1.381	–
Tarricq et al.	2022	238.775	-46.013	0.625	-0.243	-1.397	–
Dias et al.	2021	238.769	-46.013	0.64	-0.216	-1.408	–
Cantat-Gaudin et al.	2020	238.769	-46.014	0.642	-0.196	-1.395	–
Cantat-Gaudin & Anders	2020	238.769	-46.014	0.642	-0.196	-1.395	–
Liu & Pang	2019	238.775	-46.005	0.634	-0.224	-1.393	–
Bossini et al.	2019	238.769	-46.014	–	–	–	–
Bica et al.	2019	238.765	-46.02	–	–	–	–
Cantat-Gaudin et al.	2018	238.769	-46.014	0.642	-0.196	-1.395	–
Dib et al.	2018	238.777	-46.01	–	–	–	–
Sampedro et al.	2017	238.767	-46.015	–	-2.41	-1.97	–
Joshi et al.	2016	238.777	-46.01	–	–	–	–
Kharchenko et al.	2016	238.766	-46.009	–	–	–	–
Dias et al.	2014	238.767	-46.015	–	-1.67	-1.07	–
Kharchenko et al.	2013	238.777	-46.01	–	-5.43	-3.77	–
Bukowiecki et al.	2011	238.796	-46.004	–	–	–	–
Froebrich et al.	2007	238.771	-46.014	–	–	–	–
Dias et al.	2002	238.767	-46.015	–	-1.67	-1.07	–

💡 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–	1.49	1.32	1.19	184	0.075	482	0.47	–
Li et al.	2025	1.38	1.38	–	280	-0.050	–	–	–
Almeida et al.	2025	1.46	1.56	–	126	–	482	–	–
Hunt & Reffert	2024	1.49	1.50	1.19	124	–	507⁽¹⁾	–	–
Cavallo et al.	2024	1.56	1.58	–	219	0.240	–	–	–
Hunt & Reffert	2023	1.49	1.50	1.19	124	–	–	–	–
Almeida et al.	2023	1.48	1.58	–	132	0.075	412⁽¹⁾	0.47	–
Just et al.	2023	–	–	–	589	–	108	–	–
Dias et al.	2022	1.51⁽¹⁾	1.25⁽¹⁾	–	125⁽¹⁾	0.046⁽¹⁾	–	–	–
Tarricq et al.	2022	1.44	–	–	191	–	–	–	–
Dias et al.	2021	1.46	1.56	–	126	0.083	–	–	–
Cantat-Gaudin et al.	2020	1.50	1.04	–	178	–	–	–	–
Kounkel et al.	2020	1.65	1.53	–	219	–	–	–	–
Cantat-Gaudin & Anders	2020	1.49	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	151	0.250	–	–	–
Bossini et al.	2019	1.46	1.08	–	283	0.000	–	–	–
Cantat-Gaudin et al.	2018	1.49	–	–	–	–	–	–	–
Dib et al.	2018	1.51	–	–	589	–	–	–	–
Joshi et al.	2016	1.51	0.98	–	589	–	–	–	–
Kharchenko et al.	2016	1.51	0.98	–	589	–	–	–	–
Kharchenko et al.	2013	1.51	0.98	–	589	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	830	–	–
Bukowiecki et al.	2011	1.48⁽¹⁾	1.23	–	71	–	–	–	–
Dias et al.	2002	1.48	1.26	–	71	–	–	–	–

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

Visualization

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