MCM 4

(MCM2005b 4)

0.18 UTI

0.39

C_N

0.37

C_dens

0.12

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 39

Stellar density (N₅₀/rad) 1.8 [N/pc²]

C3 classification DC

C_N 0.39 Poorly populated
C_dens 0.37 Loose
C_C3 0.12 Very low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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MCM 4 is a poorly populated, loose object of very low C3 quality. Its parallax locates it at a moderate distance, near the mid-plane. It is catalogued as a cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 13 years.

⚠️ 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

Morales et al. (2013)
Classified as morphological type 'EC2' (partially embedded cluster). Morphological flag: cluster partially embedded.

Mercer et al. (2005)
Association of stars. Associated with mid-IR extended emission. Detected in 2MASS catalog with our algorithm.

Data

🔍 Search references for MCM 4 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–	275.204	-15.995	0.498	-0.714	-4.488	-2.32
Morales et al.	2013	275.133	-16.05	–	–	–	–
Mercer et al.	2005	275.137	-16.05	–	–	–	–

💡 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–	1.99	–	–	–	–	–	–	–
Morales et al.	2013	1.99	–	–	–	–	–	–	–

Visualization

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