Alessi 432

0.09 UTI

0.31

C_N

0.06

C_dens

0.12

C_C3

0.0

C_lit

0.9

C_dup

N₅₀ (P>50% members) 31

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification DC

C_N 0.31 Poorly populated
C_dens 0.06 Very loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 0.9 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Alessi 432 is a poorly populated, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

(*): The parallax distance estimate (~4.96 kpc) differs significantly from the median photometric distance (~3.73 kpc).

Note: This is very likely a unique object, which shares a very small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.9) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Near-solar metallicity Intermediate age

Data

🔍 Search references for Alessi 432 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–	121.794	-32.94	0.202	-2.354	2.785	117.765
Dias et al.	2026	121.8	-32.913	0.221	-2.352	2.81	–

💡 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–	3.73	1.71	–	299	-0.170	–	–	–
Dias et al.	2026	3.73	1.71	–	299	-0.170	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Theia 5150	9.7	121.5	-33.05	0.21	-2.41	2.68	49.45	0.05
LISC 1473	3.2	121.83	-32.82	0.24	-2.44	3.08	68.91	0.06

💡 Note: The % column shows the percentage of members that Alessi 432 shares with each listed object.

Visualization

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