HSC 251

0.38 UTI

0.68

C_N

0.41

C_dens

0.75

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 86

Core radius and density 2.6 [pc], 2.1 [pc^-2]

C3 classification AB

C_N 0.68 Moderately populated
C_dens 0.41 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 251 is a moderately populated, loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by very 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.

Relatively close Very high extinction Massive Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Wood sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.07 (50th percentile).

Data

🔍 Search references for HSC 251 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–	279.347	-6.286	0.334	0.777	-1.033	6.484
Hunt & Reffert	2024	279.332	-6.297	0.338	0.754	-1.053	1.579
Cavallo et al.	2024	279.373	-6.289	0.337	–	–	–
Hunt & Reffert	2023	279.332	-6.297	0.338	0.754	-1.053	1.579

💡 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–	2.57	5.49	3.01	486	0.140	2533	–	–
Hunt & Reffert	2024	2.57	5.49	3.01	486	–	2533⁽¹⁾	–	–
Cavallo et al.	2024	2.62	5.11	–	275	0.140	–	–	–
Hunt & Reffert	2023	2.57	5.50	3.01	486	–	–	–	–

(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 3468	100.0	279.35	-6.28	0.33	0.78	-1.02	9.27	0.13

💡 Note: The % column shows the percentage of members that HSC 251 shares with each listed object.

Visualization

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