Collinder 27

(NGC 956; MWSC 208; OCL 377)

0.24 UTI

0.0

C_N

0.39

C_dens

0.0

C_C3

0.4

C_lit

1.0

C_dup

N₅₀ (P>50% members) 21

Stellar density (N₅₀/rad) 1.9 [N/pc²]

C3 classification DD

C_N 0.0 Sparse
C_dens 0.39 Loose
C_C3 0.0 Very low quality
C_lit 0.4 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 27 is a sparse, loose object of very low C3 quality. Its parallax locates it at a moderate distance, well below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

⚠️ 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 Moderate extinction Old

Data

🔍 Search references for Collinder 27 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–	38.072	44.586	0.389	-1.279	-2.266	-94.757
Just et al.	2023	37.984	44.578	–	–	–	–
Bica et al.	2019	38.103	44.66	–	–	–	–
Loktin & Popova	2017	38.055	44.58	–	0.569	-0.534	–
Kharchenko et al.	2016	37.984	44.578	–	–	–	–
Dias et al.	2014	38.062	44.647	–	-0.86	-0.14	–
Kharchenko et al.	2013	37.995	44.58	–	0.98	0.07	–
Kharchenko et al.	2012	37.995	44.58	–	0.98	0.07	–

💡 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–	2.61	1.1	–	1259	–	214	–	–
Just et al.	2023	–	–	–	1259	–	214	–	–
Loktin & Popova	2017	3.46	0.74	–	794	–	–	–	–
Kharchenko et al.	2016	2.61	1.10	–	1259	–	–	–	–
Kharchenko et al.	2013	2.61	1.10	–	1259	–	–	–	–
Kharchenko et al.	2012	2.61	1.10	–	1259	–	–	–	–

Visualization

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