HSC 797

0.24 UTI

0.48

C_N

0.13

C_dens

0.75

C_C3

0.06

C_lit

0.79

C_dup

N_m (P>50%) 48

Core radius and density 2.3 [pc], 0.7 [pc^-2]

C3 classification AB

C_N 0.48 Poorly populated
C_dens 0.13 Very loose
C_C3 0.75 High quality
C_lit 0.06 Rarely studied
C_dup 0.79 Very likely unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

HSC 797 is a poorly populated, very loose object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate 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 is very likely a unique object, which shares a small percentage of members with at least one previously reported entry. See table with shared members information.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=0.79) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Distant Moderate extinction Metal-rich Very young

Liu et al. (2025)
Classified as primordial binary cluster 175 along with Teutsch_127.

Palma et al. (2025)
Classified as tidal capture (resonant trapping pair) P528, along with Teutsch_127.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.96 (50th percentile).

Data

🔍 Search references for HSC 797 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	334.836	55.988	0.241	-3.566	-2.637	–
Hunt & Reffert	2024	334.831	55.983	0.238	-3.545	-2.655	–
Cavallo et al.	2024	334.92	55.978	0.238	–	–	–
Hunt & Reffert	2023	334.831	55.983	0.238	-3.545	-2.655	–

💡 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–	4.07	2.055	1.21	13	0.720	745	–	–
Liu et al.	2025	9.64	0.79	–	9	–	–	–	–
Hunt & Reffert	2024	4.07	2.11	1.21	13	–	745⁽¹⁾	–	–
Cavallo et al.	2024	3.87	2.00	–	79	0.720	–	–	–
Hunt & Reffert	2023	4.07	2.11	1.21	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
Teutsch 127	20.8	334.75	56.1	0.24	-3.37	-2.51	-60.77	0.58

💡 Note: The % column shows the percentage of members that HSC 797 shares with each listed object.

Visualization

ℹ️

1 2