HSC 266

0.35 UTI

0.61

C_N

0.1

C_dens

1.0

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 72

Core radius and density 5.4 [pc], 0.5 [pc^-2]

C3 classification AA

C_N 0.61 Moderately populated
C_dens 0.1 Very loose
C_C3 1.0 Very 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 266 is a moderately populated, very loose object of very high C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster (see Parameters). It was recently reported in the literature.

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

Very distant High extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.02 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.02 (50th percentile).

Data

🔍 Search references for HSC 266 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–	280.762	-5.775	0.148	-2.238	-5.263	23.276
Hunt & Reffert	2024	280.789	-5.788	0.142	-2.299	-5.304	17.186
Cavallo et al.	2024	280.772	-5.76	0.143	–	–	–
Hunt & Reffert	2023	280.789	-5.788	0.142	-2.299	-5.304	17.186

💡 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–	6.08	4.98	2.91	108	0.000	3390	–	–
Hunt & Reffert	2024	6.08	4.98	2.91	108	–	3390⁽¹⁾	–	–
Cavallo et al.	2024	4.43	5.17	–	71	0.000	–	–	–
Hunt & Reffert	2023	6.08	4.98	2.91	108	–	–	–	–

(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 4269	88.9	280.75	-5.77	0.16	-2.23	-5.25	23.28	0.13

💡 Note: The % column shows the percentage of members that HSC 266 shares with each listed object.

Visualization

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