Alessi 8

(MWSC 2298)

0.85 UTI

0.52

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 54

Stellar density (N₅₀/rad) 8.0 [N/pc²]

C3 classification AB

C_N 0.52 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Alessi 8 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is very well-studied in the literature.

Close Low extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: good fit.

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Alessi 8 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–	232.399	-51.219	1.491	-5.942	-5.715	-29.546
Li et al.	2025	232.408	-51.227	1.479	-5.899	-5.729	–
Almeida et al.	2025	232.493	-51.196	–	–	–	–
Alfonso et al.	2024	232.42	-51.18	1.434	-5.866	-5.633	–
Hunt & Reffert	2024	232.298	-51.312	1.482	-6.016	-5.702	-32.548
Cavallo et al.	2024	232.503	-51.174	1.489	–	–	–
Hunt & Reffert	2023	232.298	-51.312	1.482	-6.016	-5.702	-32.548
Almeida et al.	2023	232.515	-51.203	–	–	–	–
He et al.	2022	232.276	-51.289	1.494	-6.029	-5.684	–
Tarricq et al.	2022	232.355	-51.212	1.494	-5.938	-5.683	–
Dias et al.	2021	232.493	-51.196	1.479	-5.887	-5.736	-26.868
Cantat-Gaudin et al.	2020	232.408	-51.227	1.479	-5.899	-5.729	–
Cantat-Gaudin & Anders	2020	232.408	-51.227	1.479	-5.899	-5.729	–
Bossini et al.	2019	232.408	-51.227	–	–	–	–
Soubiran et al.	2018	232.408	-51.227	–	–	–	-27.26
Bica et al.	2019	232.393	-51.232	–	–	–	–
Cantat-Gaudin et al.	2018	232.408	-51.227	1.479	-5.899	-5.729	–
Dias et al.	2014	232.388	-51.233	–	-5.02	-4.58	–
Piskunov et al.	2008	232.384	-51.224	–	–	–	–
Piskunov et al.	2007	232.384	-51.224	–	–	–	–
van den Bergh	2006	232.375	-51.208	–	–	–	–
Kharchenko et al.	2005	232.39	-51.23	–	-6.05	-7.01	–
Alessi et al.	2003	232.375	-51.208	–	-6.1	-5.8	–
Dias et al.	2002	232.387	-51.233	–	-6.13	-5.8	–

💡 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–	0.66	0.28	0.62	132	0.035	113	0.51	–
Li et al.	2025	0.69	0.30	–	141	0.163	–	–	–
Almeida et al.	2025	0.67	0.38	–	143	–	113	–	–
Alfonso et al.	2024	0.67	0.19	–	132	0.070	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	71⁽¹⁾	–	–
Cavallo et al.	2024	0.64	0.57	–	102	-0.020	–	–	–
Hunt & Reffert	2023	0.63	0.27	0.62	101	–	–	–	–
Almeida et al.	2023	0.65	0.34	–	209	-0.051	163⁽¹⁾	0.51	–
He et al.	2022	–	0.45	–	79	–	–	–	–
Tarricq et al.	2022	0.66	–	–	123	–	–	–	–
Dias et al.	2021	0.67	0.38	–	143	0.070	–	–	–
Cantat-Gaudin et al.	2020	0.67	0.19	–	117	–	–	–	–
Cantat-Gaudin & Anders	2020	0.66	–	–	–	–	–	–	–
Bossini et al.	2019	0.66	0.32	–	137	0.000	–	–	–
Soubiran et al.	2018	0.66	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.66	–	–	–	–	–	–	–
Piskunov et al.	2008	0.57	0.28	–	83	–	176⁽¹⁾	–	–
Piskunov et al.	2007	0.57	0.28	–	83	–	56	–	–
van den Bergh	2006	0.57	0.28	–	141	–	–	–	–
Kharchenko et al.	2005	0.57	0.28	–	83	–	–	–	–
Alessi et al.	2003	0.57	0.28	–	141	–	–	–	–
Dias et al.	2002	0.57	0.28	–	141	–	–	–	–

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

Visualization

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