OC 0026

0.27 UTI

0.0

C_N

0.2

C_dens

1.0

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 21

Core radius and density 1.9 [pc], 1.0 [pc^-2]

C3 classification AA

C_N 0.0 Sparse
C_dens 0.2 Very loose
C_C3 1.0 Very high 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 0026 is a sparse, very loose object of very high C3 quality. Its parallax locates it at a relatively close distance, near 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 age and metallicity parameters (see Parameters). It is rarely studied in the literature.

Relatively close High extinction Near-solar metallicity Young

Palma et al. (2025)
Classified as optical pair P135, along with HSC_176.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.03 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.03 (50th percentile).

Data

🔍 Search references for OC 0026 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–	274.947	-16.513	0.566	0.142	-1.729	19.141
Hunt & Reffert	2024	274.92	-16.541	0.553	0.166	-1.687	–
Cavallo et al.	2024	274.923	-16.53	0.554	–	–	–
Hunt & Reffert	2023	274.92	-16.541	0.553	0.166	-1.687	–
Hao et al.	2022	274.938	-16.536	0.568	0.103	-1.767	–

💡 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–	1.72	4.24	2.89	46	0.271	533	–	–
Hunt & Reffert	2024	1.72	4.24	2.89	46	–	533⁽¹⁾	–	–
Cavallo et al.	2024	1.66	4.17	–	100	0.520	–	–	–
Hunt & Reffert	2023	1.72	4.24	2.89	46	–	–	–	–
Hao et al.	2022	–	5.04	–	3	0.022	–	–	–

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

Visualization

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