Alessi 161

(UBC 3)

0.75 UTI

0.76

C_N

1.0

C_dens

1.0

C_C3

0.5

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 117

Radius (P>50% members) 7.4 [arcmin]

C_N 0.76 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.5 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Alessi 161 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close 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 metallicity parameter (see Parameters). It is moderately studied in the literature.

Note: This object shares a significant percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Alessi 161 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	–	283.787	12.313	0.571	-0.572	-1.383	2.321
Li et al.	2025	283.799	12.326	0.554	-0.576	-1.331	–
Hunt & Reffert	2024	283.789	12.32	0.572	-0.588	-1.399	8.585
Cavallo et al.	2024	283.789	12.31	0.572	–	–	–
Hunt & Reffert	2023	283.789	12.32	0.572	-0.588	-1.399	8.585
Cantat-Gaudin et al.	2020	283.799	12.326	0.554	-0.576	-1.331	–
Cantat-Gaudin & Anders	2020	283.799	12.326	0.554	-0.576	-1.331	–
Bica et al.	2019	283.777	12.336	–	–	–	–
Castro-Ginard et al.	2018	283.772	12.343	0.587	-0.602	-1.36	-7.25

💡 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]	Bfr	BSS
Li et al.	2025	1.50	1.09	–	447	-0.135	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	569*	–	–
Cavallo et al.	2024	1.74	1.32	–	229	0.310	–	–	–
Hunt & Reffert	2023	1.63	1.09	0.59	223	–	–	–	–
Cantat-Gaudin et al.	2020	1.71	0.98	–	126	–	–	–	–
Cantat-Gaudin & Anders	2020	1.71	–	–	–	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWWDL 12632	70.9	283.79	12.31	0.57	-0.58	-1.39	2.32	0.0

💡 Note: The % column shows the percentage of members that Alessi 161 shares with each listed object.

Visualization

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