Melotte 227

(Collinder 411; OCL 918; ESO 025 18; MWSC 3299)

0.11 UTI

0.26

C_N

0.05

C_dens

0.25

C_C3

0.0

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 26

Radius (P>50% members) 6.3 [arcmin]

C_N 0.26 Poorly populated
C_dens 0.05 Very loose
C_C3 0.25 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Melotte 227 is a poorly populated, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well below the mid-plane, affected by low extinction. It is catalogued as an intermediate-age cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 7 years.

(*): The parallax distance estimate (~5.37 kpc) differs significantly from the median photometric distance (~0.12 kpc).

⚠️ 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.

Very close Low extinction Intermediate age

Dias et al. (2002)
Asterism (Baumgardt, H. 1998, A&A 340, 402; Orellana, R. B.; De Biasi, M. S. 2008, RevMexAA 34, 111)

Data

🔍 Search references for Melotte 227 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	–	304.028	-78.981	0.186	1.859	-5.498	–
Bica et al.	2019	304.07	-78.963	–	–	–	–
van den Bergh	2006	303.025	-79.317	–	–	–	–

💡 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]	Bfr	BSS
van den Bergh	2006	0.12	0.12	–	372	–	–	–	–

Visualization

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