OC 0440

0.33 UTI

0.49

C_N

0.05

C_dens

1.0

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 49

Core radius and density 3.6 [pc], 0.2 [pc^-2]

C3 classification AA

C_N 0.49 Poorly populated
C_dens 0.05 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 0440 is a poorly populated, very loose object of very high C3 quality. Its parallax locates it at a very large distance, well below the mid-plane, affected by moderate extinction. It is catalogued as a massive, metal-poor, young cluster, but with a large variance across recent sources for the distance, age, and metallicity parameters (see Parameters). It is rarely studied in the literature.

Extremely distant Moderate extinction Massive Metal-poor Young

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.66 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.66 (50th percentile).

Data

🔍 Search references for OC 0440 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–	117.051	-36.149	0.072	-1.134	2.192	–
Hunt & Reffert	2024	117.05	-36.148	0.061	-1.143	2.193	114.67
Cavallo et al.	2024	117.068	-36.163	0.066	–	–	–
Hunt & Reffert	2023	117.05	-36.148	0.061	-1.143	2.193	114.67
Hao et al.	2022	117.063	-36.152	0.07	-1.132	2.186	–

💡 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–	10.34	2.32	1.49	38	-0.500	1301	–	–
Hunt & Reffert	2024	10.34	2.32	1.49	38	–	1301⁽¹⁾	–	–
Cavallo et al.	2024	2.68	2.26	–	71	-1.050	–	–	–
Hunt & Reffert	2023	10.35	2.32	1.49	38	–	–	–	–
Hao et al.	2022	–	2.46	–	1	0.049	–	–	–

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

Visualization

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