HSC 739

0.25 UTI

0.5

C_N

0.33

C_dens

0.38

C_C3

0.03

C_lit

1.0

C_dup

N_m (P>50%) 51

Core radius and density 1.6 [pc], 1.6 [pc^-2]

C3 classification CB

C_N 0.5 Moderately populated
C_dens 0.33 Loose
C_C3 0.38 Low 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

ℹ️

HSC 739 is a moderately populated, loose object of low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by high extinction. It is catalogued as a metal-rich, very young cluster, but with a large variance across recent sources for the age parameter (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.

⚠️ 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.

Distant High extinction Metal-rich Very young

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.63 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.63 (50th percentile).

Data

🔍 Search references for HSC 739 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	323.265	51.313	0.203	-3.348	-3.341	–
Hunt & Reffert	2024	323.262	51.307	0.21	-3.312	-3.339	–
Cavallo et al.	2024	323.277	51.311	0.207	–	–	–
Hunt & Reffert	2023	323.262	51.307	0.21	-3.312	-3.339	–

💡 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–	4.69	3.43	2.9	13	0.740	738	–	–
Hunt & Reffert	2024	4.69	3.43	2.90	13	–	738⁽¹⁾	–	–
Cavallo et al.	2024	3.98	2.58	–	257	0.740	–	–	–
Hunt & Reffert	2023	4.69	3.43	2.90	13	–	–	–	–

(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 3248	90.2	323.27	51.31	0.2	-3.36	-3.34	-65.81	0.06

💡 Note: The % column shows the percentage of members that HSC 739 shares with each listed object.

Visualization

ℹ️

1 2