Alessi 13

(MWSC 278; Chi For Group; Harrington 2; Slotegraaf 3; Ramakers 26)

0.90 UTI

0.75

C_N

0.76

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 100

Stellar density (N₅₀/rad) 3.8 [N/pc²]

C3 classification AA

C_N 0.75 Rich
C_dens 0.76 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 13 is a rich, dense object of very high C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the absorption parameter (see Parameters). It is very well-studied in the literature.

Very close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as a moving group.

Data

🔍 Search references for Alessi 13 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–	51.98	-35.66	9.465	36.043	-4.52	17.42
Almeida et al.	2025	51.613	-35.646	–	–	–	–
Alfonso et al.	2024	52.383	-35.177	9.353	35.232	-4.885	–
Cavallo et al.	2024	52.405	-35.809	9.525	–	–	–
Hunt & Reffert	2023	51.993	-35.773	9.502	35.499	-4.184	18.017
He et al.	2022	52.053	-35.669	9.535	36.141	-4.606	–
Dias et al.	2021	51.613	-35.646	9.538	36.164	-4.636	20.448
Cantat-Gaudin et al.	2020	51.762	-35.821	9.584	36.332	-4.709	–
Cantat-Gaudin & Anders	2020	51.762	-35.821	9.584	36.332	-4.709	–
Monteiro & Dias	2019	51.762	-35.821	–	37.229	-4.756	2.545
Soubiran et al.	2018	51.762	-35.821	–	–	–	21.13
Bica et al.	2019	52.054	-35.902	–	–	–	–
Cantat-Gaudin et al.	2018	51.762	-35.821	9.584	36.332	-4.709	–
Yen et al.	2018	51.083	-35.824	9.62	37.08	-4.3	–
Dias et al.	2014	50.425	-36.3	–	4.39	-0.03	–
Gozha et al.	2012	50.425	-36.3	–	–	–	–
Piskunov et al.	2008	52.041	-35.902	–	–	–	–
Kharchenko et al.	2007	53.5	-35.32	–	3.2	–	19.53
Piskunov et al.	2007	52.041	-35.902	–	–	–	–
van den Bergh	2006	53.5	-35.317	–	–	–	–
Kharchenko et al.	2005	52.05	-35.9	–	36.97	-3.18	20.1
Dias et al.	2002	50.425	-36.3	–	36.39	-4.74	19.53

💡 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–	0.1	0.12	0.6	64	0.180	384	–	–
Almeida et al.	2025	0.10	0.04	–	59	–	22	–	–
Alfonso et al.	2024	0.11	0.10	–	49	0.231	–	–	–
Cavallo et al.	2024	0.11	0.82	–	69	0.190	–	–	–
Hunt & Reffert	2023	0.10	0.16	0.60	25	–	–	–	–
He et al.	2022	–	0.05	–	32	–	–	–	–
Dias et al.	2021	0.10	0.04	–	59	0.231	–	–	–
Cantat-Gaudin et al.	2020	0.11	0.10	–	35	–	–	–	–
Cantat-Gaudin & Anders	2020	0.10	–	–	–	–	–	–	–
Monteiro & Dias	2019	0.10	0.26	–	68	0.017	–	–	–
Soubiran et al.	2018	0.10	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.10	–	–	–	–	–	–	–
Yen et al.	2018	0.10	0.08	–	562	–	–	–	–
Gozha et al.	2012	0.10	–	–	–	0.170	417	–	–
Piskunov et al.	2008	0.11	0.12	–	525	–	479⁽¹⁾	–	–
Piskunov et al.	2007	0.11	0.12	–	525	–	351	–	–
van den Bergh	2006	0.11	0.12	–	–	–	–	–	–
Kharchenko et al.	2005	0.11	0.12	–	525	–	–	–	–
Dias et al.	2002	0.10	–	–	–	0.170	–	–	–

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

Visualization

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