OC 0453

0.21 UTI

0.27

C_N

0.29

C_dens

0.38

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 27

Core radius and density 1.1 [pc], 1.5 [pc^-2]

C3 classification CB

C_N 0.27 Poorly populated
C_dens 0.29 Loose
C_C3 0.38 Low quality
C_lit 0.06 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

OC 0453 is a poorly populated, loose object of low C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is rarely studied in the literature.

⚠️ 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.

Relatively close High extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P33, along with HSC_2073.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.93 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.93 (50th percentile).

Data

🔍 Search references for OC 0453 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–	125.067	-40.488	0.429	-4.046	4.011	–
Hunt & Reffert	2024	125.071	-40.48	0.431	-4.055	4.029	–
Cavallo et al.	2024	125.034	-40.477	0.429	–	–	–
Hunt & Reffert	2023	125.071	-40.48	0.431	-4.055	4.029	–
Hao et al.	2022	125.114	-40.501	0.443	-4.029	3.951	–

💡 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–	2.19	3.625	2.34	26	0.294	463	–	–
Hunt & Reffert	2024	2.19	3.66	2.34	32	–	463⁽¹⁾	–	–
Cavallo et al.	2024	2.68	3.59	–	19	0.540	–	–	–
Hunt & Reffert	2023	2.19	3.66	2.34	33	–	–	–	–
Hao et al.	2022	–	1.47	–	6	0.049	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Visualization

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