Alessi 72

0.36 UTI

0.42

C_N

0.29

C_dens

0.5

C_C3

0.3

C_lit

1.0

C_dup

N₅₀ (P>50% members) 42

Stellar density (N₅₀/rad) 1.5 [N/pc²]

C3 classification BB

C_N 0.42 Poorly populated
C_dens 0.29 Loose
C_C3 0.5 Intermediate quality
C_lit 0.3 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Alessi 72 is a poorly populated, loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is poorly studied in the literature.

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

Relatively close Low extinction Near-solar metallicity Young

Liu et al. (2025)
Classified as primordial binary cluster 24 along with HSC_1808, and as primordial binary cluster 65 along with CWNU_281, and of multiple system 12 along with CWNU_281 and HSC_1808.

Palma et al. (2025)
Classified as genetic pair P183, along with HSC_1808.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Alessi 72 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–	106.618	-16.162	0.765	-3.089	1.769	36.403
Liu et al.	2025	106.54	-16.07	0.76	-3.07	1.75	31.26
Hunt & Reffert	2024	106.537	-16.068	0.762	-3.069	1.745	31.258
Cavallo et al.	2024	106.592	-16.194	0.764	–	–	–
Hunt & Reffert	2023	106.537	-16.068	0.762	-3.069	1.745	31.258
Bica et al.	2019	106.51	-16.057	–	–	–	–

💡 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–	1.25	0.53	0.67	35	-0.260	148	–	–
Liu et al.	2025	1.60	0.21	–	30	–	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	148⁽¹⁾	–	–
Cavallo et al.	2024	1.25	0.68	–	35	-0.260	–	–	–
Hunt & Reffert	2023	1.25	0.53	0.67	51	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1157	57.1	106.53	-16.11	0.79	-3.11	1.78	37.62	0.01

💡 Note: The % column shows the percentage of members that Alessi 72 shares with each listed object.

Visualization

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