Alessi 16

(MWSC 968)

0.23 UTI

0.0

C_N

0.26

C_dens

0.25

C_C3

0.31

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Radius (P>50% members) 4.5 [arcmin]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.26 Loose
C_C3 0.25 Low quality
C_lit 0.31 Poorly studied
C_dup 1.0 Unique

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

Overview

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Alessi 16 is a sparse, loose object of low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~3.05 kpc) differs significantly from the median photometric distance (~2.09 kpc).

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

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Low mass Intermediate age

Data

🔍 Search references for Alessi 16 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–	100.826	2.15	0.328	-0.258	1.502	70.834
Just et al.	2023	100.883	2.177	–	–	–	–
Kharchenko et al.	2016	100.883	2.177	–	–	–	–
Kharchenko et al.	2013	100.89	2.175	–	-0.98	-2.14	50.3
Kronberger et al.	2006	100.896	2.173	–	–	–	–
Dias et al.	2002	100.896	2.173	–	-0.98	-2.14	–

💡 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–	2.09	1.94	–	447	–	16	–	–
Just et al.	2023	–	–	–	447	–	16	–	–
Kharchenko et al.	2016	2.09	1.94	–	447	–	–	–	–
Kharchenko et al.	2013	2.09	1.94	–	447	–	–	–	–
Dias et al.	2002	1.19	0.84	–	1122	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
HSC 1659	80.0	100.81	2.12	0.33	-0.28	1.5	62.76	0.02

💡 Note: The % column shows the percentage of members that Alessi 16 shares with each listed object.

Visualization

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