Alessi 5

(MWSC 1844; FoF 2407; OCSN 138)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 665

Stellar density (N₅₀/rad) 83.7 [N/pc²]

C3 classification AA

C_N 1.0 Very rich
C_dens 1.0 Very dense
C_C3 1.0 Very 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 5 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a low-mass, near-solar metallicity, young cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature.

Very close Low extinction Low mass Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Alessi 5 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–	160.833	-61.089	2.508	-15.386	2.526	10.065
Li et al.	2025	160.819	-61.081	2.501	-15.411	2.503	–
Wei et al.	2025	160.83	-61.039	2.514	-15.351	2.469	–
Almeida et al.	2025	160.621	-61.118	–	–	–	–
Alfonso et al.	2024	160.904	-61.086	2.484	-15.376	2.542	–
Hunt & Reffert	2024	160.902	-61.111	2.497	-15.4	2.544	13.41
Cavallo et al.	2024	160.827	-61.086	2.509	–	–	–
Hunt & Reffert	2023	160.902	-61.111	2.497	-15.4	2.544	13.41
Qin et al.	2023	160.87	-61.09	2.5	-15.36	2.52	9.65
Just et al.	2023	160.824	-61.166	–	–	–	–
He et al.	2022	160.7	-61.029	2.502	-15.453	2.556	–
Dias et al.	2021	160.621	-61.118	2.492	-15.363	2.537	11.504
Cantat-Gaudin et al.	2020	160.819	-61.081	2.501	-15.411	2.503	–
Cantat-Gaudin & Anders	2020	160.819	-61.081	2.501	-15.411	2.503	–
Liu & Pang	2019	160.691	-61.076	2.494	-15.354	2.569	–
Bossini et al.	2019	160.819	-61.081	–	–	–	–
Soubiran et al.	2018	160.819	-61.081	–	–	–	12.49
Bica et al.	2019	160.777	-61.165	–	–	–	–
Cantat-Gaudin et al.	2018	160.819	-61.081	2.501	-15.411	2.503	–
Loktin & Popova	2017	160.785	-61.167	–	-14.33	4.4	8.2
Kharchenko et al.	2016	160.824	-61.166	–	–	–	–
Dias et al.	2014	160.783	-61.167	–	-2.62	-1.91	–
Kharchenko et al.	2013	160.83	-61.17	–	-12.5	2.42	8.2
Gozha et al.	2012	160.783	-61.167	–	–	–	–
Piskunov et al.	2008	160.777	-61.165	–	–	–	–
Kharchenko et al.	2007	160.78	-61.17	–	0.3	–	12.8
Piskunov et al.	2007	160.777	-61.165	–	–	–	–
van den Bergh	2006	160.725	-61.2	–	–	–	–
Kharchenko et al.	2005	160.78	-61.17	–	-14.56	3.77	12.8
Alessi et al.	2003	160.725	-61.2	–	-14.3	4.4	–
Dias et al.	2002	160.783	-61.167	–	-14.33	4.4	18.0

💡 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–	0.4	0.48	0.73	51	0.000	37	0.17	–
Li et al.	2025	0.44	0.57	–	54	0.048	–	–	–
Wei et al.	2025	0.51	0.76	–	41	0.000	492	0.17	–
Almeida et al.	2025	0.40	0.40	–	61	–	408	–	–
Alfonso et al.	2024	0.42	0.62	–	49	0.063	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	684⁽¹⁾	–	–
Cavallo et al.	2024	0.41	0.85	–	26	0.130	–	–	–
Hunt & Reffert	2023	0.38	0.40	0.73	56	–	–	–	–
Qin et al.	2023	0.48	0.59	–	56	–	–	–	–
Just et al.	2023	–	–	–	58	–	18	–	–
He et al.	2022	–	0.50	–	40	–	–	–	–
Tarricq et al.	2022	0.42	–	–	68	–	–	–	–
Dias et al.	2021	0.40	0.40	–	61	0.064	–	–	–
Cantat-Gaudin et al.	2020	0.42	0.62	–	68	–	–	–	–
Cantat-Gaudin & Anders	2020	0.40	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	34	-0.250	–	–	–
Bossini et al.	2019	0.35	0.59	–	53	-0.133	–	–	–
Soubiran et al.	2018	0.40	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.40	–	–	–	–	–	–	–
Loktin & Popova	2017	0.42	0.46	–	40	–	–	–	–
Kharchenko et al.	2016	0.38	0.64	–	58	–	–	–	–
Kharchenko et al.	2013	0.38	0.64	–	58	-0.382	–	–	–
Gozha et al.	2012	0.40	–	–	40	–	37	–	–
Piskunov et al.	2008	0.40	0.46	–	51	–	18⁽¹⁾	–	–
Piskunov et al.	2007	0.40	0.46	–	51	–	9	–	–
van den Bergh	2006	0.40	0.46	–	40	–	–	–	–
Kharchenko et al.	2005	0.40	0.46	–	51	–	–	–	–
Alessi et al.	2003	0.40	0.46	–	40	–	–	–	–
Dias et al.	2002	0.40	0.46	–	40	-0.382	–	–	–

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

Visualization

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