Collinder 240

0.13 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.25

C_lit

1.0

C_dup

N₅₀ (P>50% members) 9

Stellar density (N₅₀/rad) 0.2 [N/pc²]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.12 Very low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Collinder 240 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, near the mid-plane, affected by low extinction. It is catalogued as a very young cluster (see Parameters). It is poorly studied in the literature, with no articles listed in the last 9 years.

(*): The parallax distance estimate (~4.07 kpc) differs significantly from the median photometric distance (~1.58 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.

Relatively close Low extinction Very young

Data

🔍 Search references for Collinder 240 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–	168.001	-60.343	0.246	-6.21	2.564	42.471
Loktin & Popova	2017	167.91	-60.309	–	-4.33	-1.82	-8.02
Dias et al.	2014	167.917	-60.31	–	-4.33	-1.82	-8.02
van den Bergh	2006	167.8	-60.283	–	–	–	–
Dias et al.	2002	167.917	-60.31	–	-4.33	-1.82	-8.02

💡 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–	1.58	0.96	–	14	–	–	–	–
Loktin & Popova	2017	1.58	0.96	–	14	–	–	–	–
van den Bergh	2006	1.58	0.96	–	14	–	–	–	–
Dias et al.	2002	1.58	0.96	–	14	–	–	–	–

Visualization

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