Alessi 59

(MWSC 1004; DSH J0652.3+0211)

0.61 UTI

0.39

C_N

0.89

C_dens

0.75

C_C3

0.52

C_lit

1.0

C_dup

N_m (P>50%) 39

Core radius and density 1.0 [pc], 4.4 [pc^-2]

C3 classification AB

C_N 0.39 Poorly populated
C_dens 0.89 Dense
C_C3 0.75 High quality
C_lit 0.52 Moderately studied
C_dup 1.0 Unique

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

Overview

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Alessi 59 is a poorly populated, dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is moderately studied in the literature.

Distant Moderate extinction Near-solar metallicity Young

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

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.98 (50th percentile).

Hunt & Reffert (2023)
Classified as moving group. CMD class: 0.98 (50th percentile).

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010). List of clusters and alike reported by B. Alessi.

Data

🔍 Search references for Alessi 59 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–	103.072	2.194	0.237	-0.525	0.166	–
Almeida et al.	2025	103.071	2.197	–	–	–	–
Hunt & Reffert	2024	103.075	2.197	0.218	-0.547	0.005	68.644
Celli et al.	2024	103.078	2.191	–	–	–	–
Just et al.	2023	103.081	2.192	–	–	–	–
Dias et al.	2021	103.071	2.197	0.199	-0.604	0.22	–
Cantat-Gaudin et al.	2020	103.078	2.196	0.227	-0.54	0.283	–
Cantat-Gaudin & Anders	2020	103.078	2.196	0.227	-0.54	0.283	–
Bica et al.	2019	103.075	2.191	–	–	–	–
Cantat-Gaudin et al.	2018	103.078	2.196	0.227	-0.54	0.283	–
Loktin & Popova	2017	103.08	2.191	–	0.08	-0.986	–
Kharchenko et al.	2016	103.081	2.192	–	–	–	–
Dias et al.	2014	103.079	2.191	–	-2.17	0.48	–
Kharchenko et al.	2013	103.087	2.19	–	0.85	-2.37	–
Bukowiecki et al.	2011	103.083	2.197	–	–	–	–
Kronberger et al.	2006	103.078	2.191	–	–	–	–
Dias et al.	2002	103.079	2.191	–	0.85	-2.37	–

💡 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–	3.9	1.86	2.34	25	-0.094	201	–	–
Almeida et al.	2025	4.39	1.62	–	569	–	155	–	–
Hunt & Reffert	2024	3.85	1.42	2.34	138	–	174⁽¹⁾	–	–
Celli et al.	2024	–	–	–	10	–	201	–	–
Just et al.	2023	–	–	–	10	–	548	–	–
Dias et al.	2021	4.39	1.62	–	569	-0.094	–	–	–
Kounkel et al.	2020	4.93	2.49	–	15	–	–	–	–
Cantat-Gaudin & Anders	2020	3.90	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.90	–	–	–	–	–	–	–
Loktin & Popova	2017	4.24	1.33	–	174	–	–	–	–
Kharchenko et al.	2016	3.51	2.43	–	10	–	–	–	–
Kharchenko et al.	2013	3.51	2.43	–	10	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	624	–	–
Bukowiecki et al.	2011	3.87⁽¹⁾	2.02	–	25	–	–	–	–
Dias et al.	2002	3.50	1.86	–	40	–	–	–	–

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

Visualization

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