HSC 2776

0.15 UTI

0.32

C_N

0.05

C_dens

0.5

C_C3

0.03

C_lit

0.78

C_dup

N_m (P>50%) 32

Core radius and density 3.1 [pc], 0.2 [pc^-2]

C3 classification BB

C_N 0.32 Poorly populated
C_dens 0.05 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.03 Rarely studied
C_dup 0.78 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2776 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It was recently reported in the literature.

Note: This is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.78) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Relatively close Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.68 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.68 (50th percentile).

Data

🔍 Search references for HSC 2776 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–	246.064	-48.865	0.357	-1.361	-2.845	-34.702
Hunt & Reffert	2024	246.165	-48.824	0.355	-1.418	-2.87	–
Cavallo et al.	2024	246.124	-48.817	0.349	–	–	–
Hunt & Reffert	2023	246.165	-48.824	0.355	-1.418	-2.87	–

💡 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–	2.5	2.68	2.74	48	-0.450	559	–	–
Hunt & Reffert	2024	2.50	2.68	2.74	48	–	559⁽¹⁾	–	–
Cavallo et al.	2024	1.98	2.88	–	9	-0.450	–	–	–
Hunt & Reffert	2023	2.50	2.68	2.74	48	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4126	53.1	246.14	-48.79	0.35	-1.27	-2.78	-32.71	0.13
CWNU 2395	21.9	245.65	-49.17	0.38	-1.42	-2.93	-27.98	0.28

💡 Note: The % column shows the percentage of members that HSC 2776 shares with each listed object.

Visualization

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