HSC 104

0.00 UTI

0.0

C_N

0.75

C_dens

0.75

C_C3

0.03

C_lit

0.0

C_dup

N_m (P>50%) 22

Core radius and density 0.5 [pc], 3.7 [pc^-2]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.75 Dense
C_C3 0.75 High quality
C_lit 0.03 Rarely studied
C_dup 0.0 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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HSC 104 is a sparse, dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age parameter (see Parameters). It was recently reported in the literature.

⚠️ Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close High extinction Near-solar metallicity Very young

Palma et al. (2025)
Part of multiple system G101, along with CWNU_2598, UFMG_81 and CWNU_1468.

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.41 (50th percentile).

Data

🔍 Search references for HSC 104 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–	270.499	-22.736	0.398	0.07	-1.175	-51.855
Hunt & Reffert	2024	270.516	-22.73	0.424	0.053	-1.163	–
Cavallo et al.	2024	270.503	-22.727	0.424	–	–	–
Hunt & Reffert	2023	270.516	-22.73	0.424	0.053	-1.163	–

💡 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–	2.24	4.46	2.21	19	0.350	550	–	–
Hunt & Reffert	2024	2.24	4.46	2.21	19	–	550⁽¹⁾	–	–
Cavallo et al.	2024	2.44	3.58	–	151	0.350	–	–	–
Hunt & Reffert	2023	2.24	4.46	2.21	19	–	–	–	–

(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 2530	100.0	270.5	-22.73	0.39	0.09	-1.16	-13.33	0.44

💡 Note: The % column shows the percentage of members that HSC 104 shares with each listed object.

Visualization

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