OC 0492

0.27 UTI

0.43

C_N

0.31

C_dens

0.5

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 43

Core radius and density 1.8 [pc], 1.6 [pc^-2]

C3 classification BB

C_N 0.43 Poorly populated
C_dens 0.31 Loose
C_C3 0.5 Intermediate 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

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OC 0492 is a poorly populated, loose object of intermediate 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, young cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is rarely studied in the literature.

Relatively close High extinction Metal-rich Young

Palma et al. (2025)
Part of multiple system G141, along with HSC_2149, UBC_1449 and HSC_2153.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for OC 0492 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–	134.263	-46.054	0.45	-4.526	5.484	164.897
Hunt & Reffert	2024	134.282	-46.048	0.456	-4.511	5.486	93.371
Cavallo et al.	2024	134.213	-46.08	0.454	–	–	–
Hunt & Reffert	2023	134.282	-46.048	0.456	-4.511	5.486	93.371
Hao et al.	2022	134.261	-46.05	0.447	-4.536	5.469	–

💡 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–	2.13	3.51	2.39	25	0.568	519	–	–
Hunt & Reffert	2024	2.13	3.60	2.39	25	–	519⁽¹⁾	–	–
Cavallo et al.	2024	2.56	3.42	–	78	0.870	–	–	–
Hunt & Reffert	2023	2.13	3.60	2.39	25	–	–	–	–
Hao et al.	2022	–	2.38	–	6	0.265	–	–	–

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

Visualization

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