OC 0254

0.03 UTI

0.27

C_N

0.07

C_dens

0.5

C_C3

0.06

C_lit

0.15

C_dup

N_m (P>50%) 27

Core radius and density 2.9 [pc], 0.3 [pc^-2]

C3 classification BB

C_N 0.27 Poorly populated
C_dens 0.07 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.06 Rarely studied
C_dup 0.15 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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OC 0254 is a poorly populated, very loose object of intermediate C3 quality. Its parallax locates it at a large distance, above the mid-plane, affected by moderate 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.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Very distant Moderate extinction Near-solar metallicity Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.23 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.23 (50th percentile).

Data

🔍 Search references for OC 0254 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–	42.529	62.082	0.159	-0.6	0.155	–
Hunt & Reffert	2024	42.538	62.093	0.185	-0.585	0.156	-69.983
Cavallo et al.	2024	42.593	62.061	0.184	–	–	–
Hunt & Reffert	2023	42.538	62.093	0.185	-0.585	0.156	-69.983
Hao et al.	2022	42.59	62.028	0.157	-0.582	0.148	–

💡 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–	5.67	2.39	2.5	54	0.239	946	–	–
Hunt & Reffert	2024	5.67	2.39	2.50	54	–	946⁽¹⁾	–	–
Cavallo et al.	2024	3.89	2.15	–	155	0.430	–	–	–
Hunt & Reffert	2023	5.67	2.39	2.50	54	–	–	–	–
Hao et al.	2022	–	3.90	–	3	0.049	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
AFGL5085	85.2	42.54	62.06	0.17	-0.6	0.17	–	0.17

💡 Note: The % column shows the percentage of members that OC 0254 shares with each listed object.

Visualization

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