Alessi 17

(MWSC 1271)

0.73 UTI

0.35

C_N

1.0

C_dens

0.75

C_C3

0.78

C_lit

1.0

C_dup

N₅₀ (P>50% members) 35

Stellar density (N₅₀/rad) 13.1 [N/pc²]

C3 classification AB

C_N 0.35 Poorly populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.78 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Alessi 17 is a poorly populated, very 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, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is well-studied in the literature.

Distant Moderate extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Gold sample.

Dias et al. (2002)
Asterism (Kronberger, M. 2005, private communication)

Data

🔍 Search references for Alessi 17 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	113.853	-15.097	0.231	-1.492	1.552	66.026
Li et al.	2025	113.853	-15.098	0.264	-1.526	1.557	–
Almeida et al.	2025	113.853	-15.092	–	–	–	–
Hunt & Reffert	2024	113.852	-15.098	0.215	-1.456	1.574	–
Cavallo et al.	2024	113.835	-15.094	0.216	–	–	–
Hunt & Reffert	2023	113.852	-15.098	0.215	-1.456	1.574	–
Just et al.	2023	113.844	-15.089	–	–	–	–
Dias et al.	2021	113.853	-15.092	0.262	-1.554	1.558	–
Cantat-Gaudin et al.	2020	113.853	-15.098	0.264	-1.526	1.557	–
Cantat-Gaudin & Anders	2020	113.853	-15.098	0.264	-1.526	1.557	–
Soubiran et al.	2018	113.853	-15.098	–	–	–	70.21
Bica et al.	2019	113.845	-15.093	–	–	–	–
Cantat-Gaudin et al.	2018	113.853	-15.098	0.264	-1.526	1.557	–
Kharchenko et al.	2016	113.844	-15.089	–	–	–	–
Kharchenko et al.	2013	113.85	-15.092	–	-3.36	-0.75	–

💡 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–	3.72	1.26	0.87	261	-0.138	327	–	–
Li et al.	2025	4.42	1.26	–	309	-0.044	–	–	–
Almeida et al.	2025	3.72	0.81	–	897	–	147	–	–
Hunt & Reffert	2024	–	–	–	–	–	327⁽¹⁾	–	–
Cavallo et al.	2024	3.50	1.35	–	282	-0.480	–	–	–
Hunt & Reffert	2023	4.27	0.89	0.87	240	–	–	–	–
Just et al.	2023	–	–	–	166	–	445	–	–
Dias et al.	2021	3.72	0.81	–	897	-0.138	–	–	–
Cantat-Gaudin & Anders	2020	3.42	–	–	–	–	–	–	–
Soubiran et al.	2018	3.42	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.42	–	–	–	–	–	–	–
Kharchenko et al.	2016	4.70	1.35	–	166	–	–	–	–
Kharchenko et al.	2013	4.70	1.35	–	166	–	–	–	–

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

Visualization

ℹ️

1 2 3