Alessi 52

0.16 UTI

0.0

C_N

0.03

C_dens

0.75

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 15

Stellar density (N₅₀/rad) 0.2 [N/pc²]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.75 High 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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Alessi 52 is a sparse, very loose object of high C3 quality. Its parallax locates it at a large^* distance, near the mid-plane, affected by high extinction. It is catalogued as an old cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 12 years.

(*): The parallax distance estimate (~7.33 kpc) differs significantly from the median photometric distance (~3.33 kpc).

Note: This object shares a significant percentage of members with 3 later reported entries. See table with shared members information.

⚠️ 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.

Distant High extinction Old

Data

🔍 Search references for Alessi 52 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–	183.139	-62.704	0.136	-6.36	0.686	–
Dias et al.	2014	183.258	-62.706	–	-4.99	-0.06	–
Kronberger et al.	2006	183.257	-62.706	–	–	–	–
Dias et al.	2002	183.258	-62.706	–	–	–	–

💡 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–	3.33	3.35	–	1413	–	–	–	–
Dias et al.	2002	3.33	3.35	–	1413	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 3697	56.0	182.98	-62.65	0.19	-6.36	0.67	–	0.06
CWNU 3471	40.0	183.26	-62.71	0.17	-6.25	0.64	10.87	0.19
VVV 011	12.0	183.21	-62.71	0.03	-6.3	0.57	–	0.07

💡 Note: The % column shows the percentage of members that Alessi 52 shares with each listed object.

Visualization

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