ESFERA 1

0.22 UTI

0.32

C_N

0.54

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

N_m (P>50%) 32

Core radius and density 1.2 [pc], 2.7 [pc^-2]

C3 classification DB

C_N 0.32 Poorly populated
C_dens 0.54 Moderately dense
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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ESFERA 1 is a poorly populated, moderately dense object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a young cluster (see Parameters). It was recently reported in the literature.

⚠️ 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 High extinction Young

Data

🔍 Search references for ESFERA 1 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–	227.364	-58.423	0.415	-3.398	-2.845	-17.862
Corti et al.	2026	227.323	-58.427	–	-3.46	-2.86	–

💡 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–	2.45	4.0	–	30	–	–	–	–
Corti et al.	2026	2.45	4.00	–	30	–	–	–	–

Visualization

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