HSC 2777

0.18 UTI

0.0

C_N

0.1

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 17

Core radius and density 2.5 [pc], 0.5 [pc^-2]

C3 classification AB

C_N 0.0 Sparse
C_dens 0.1 Very loose
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 2777 is a sparse, very loose object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, very young cluster (see Parameters). It was recently reported in the literature.

⚠️ 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.

Close Low extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for HSC 2777 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–	246.97	-49.066	1.077	-1.031	-2.365	2.016
Hunt & Reffert	2024	246.902	-49.029	1.061	-1.013	-2.365	-4.437
Cavallo et al.	2024	246.871	-49.09	1.052	–	–	–
Hunt & Reffert	2023	246.902	-49.029	1.061	-1.013	-2.365	-4.437

💡 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–	0.9	0.41	0.33	18	0.380	59	–	–
Hunt & Reffert	2024	0.90	0.41	0.33	18	–	59⁽¹⁾	–	–
Cavallo et al.	2024	0.92	0.54	–	29	0.380	–	–	–
Hunt & Reffert	2023	0.90	0.41	0.33	18	–	–	–	–

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

Visualization

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