ESO 231 30

(MWSC 3080)

0.22 UTI

0.25

C_N

0.1

C_dens

0.25

C_C3

0.25

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 25

Radius (P>50% members) 6.3 [arcmin]

C_N 0.25 Poorly populated
C_dens 0.1 Very loose
C_C3 0.25 Low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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ESO 231 30 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a moderate^* distance, well below the mid-plane, affected by low 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 (~3.88 kpc) differs significantly from the median photometric distance (~2.67 kpc).

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

Relatively close Low extinction Old

Data

🔍 Search references for ESO 231 30 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	–	289.214	-51.485	0.258	-1.066	-5.106	9.26
Bica et al.	2019	289.217	-51.493	–	–	–	–
Loktin & Popova	2017	289.215	-51.492	–	2.639	-8.385	43.65
Dias et al.	2014	289.217	-51.492	–	-0.38	-4.62	43.65
Dias et al.	2002	289.217	-51.492	–	-0.41	-4.76	43.65

💡 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]	Bfr	BSS
Loktin & Popova	2017	2.05	0.05	–	1862	–	–	–	–
Dias et al.	2002	3.28	0.23	–	3162	–	–	–	–

Visualization

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