COIN-Gaia 41

(COIN 41)

0.52 UTI

0.76

C_N

0.2

C_dens

0.5

C_C3

0.55

C_lit

1.0

C_dup

N_m (P>50%) 137

Core radius and density 4.5 [pc], 1.0 [pc^-2]

C3 classification BB

C_N 0.76 Rich
C_dens 0.2 Very loose
C_C3 0.5 Intermediate quality
C_lit 0.55 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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COIN-Gaia 41 is a rich, very loose object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

Li et al. (2026)
Tidal & Core radii: r_t=33+/-48.6 [pc], r_c=0.39+/-0.07 [pc]; stars within r_t: N~58

Palma et al. (2025)
Classified as optical pair P281, along with Theia_6999.

Almeida et al. (2025)
Mass determination: intermediate fit. Isochrone match: intermediate fit.

Cavallo et al. (2024)
Silver sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.06 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2526, e_all=0.1281.

Data

🔍 Search references for COIN-Gaia 41 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–	89.846	19.004	0.54	-0.315	-3.681	6.86
Li et al.	2026	89.85	19.03	–	–	–	–
Almeida et al.	2025	89.834	19.034	–	–	–	–
Zhang et al.	2024	89.827	18.987	–	–	–	–
Hunt & Reffert	2024	89.827	18.987	0.538	-0.291	-3.688	12.469
Cavallo et al.	2024	89.833	18.984	0.539	–	–	–
Hunt & Reffert	2023	89.827	18.987	0.538	-0.291	-3.688	12.469
Fu et al.	2022	89.835	19.026	–	–	–	5.75
Dias et al.	2021	89.834	19.034	0.519	-0.326	-3.659	20.121
Cantat-Gaudin et al.	2020	89.835	19.026	0.52	-0.314	-3.685	–
Cantat-Gaudin & Anders	2020	89.835	19.026	0.52	-0.314	-3.685	–
Monteiro & Dias	2019	89.832	19.028	–	–	–	2.389
Cantat-Gaudin et al.	2019	89.832	19.028	0.52	-0.32	-3.66	–

💡 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–	1.76	2.13	2.52	150	-0.069	624	–	–
Almeida et al.	2025	1.76	2.16	–	12	–	490	–	–
Zhang et al.	2024	–	–	–	–	-0.229⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.74	2.13	2.52	326	–	759⁽¹⁾	–	–
Cavallo et al.	2024	1.96	2.35	–	174	0.260	–	–	–
Hunt & Reffert	2023	1.74	2.13	2.52	326	–	–	–	–
Fu et al.	2022	–	–	–	–	-0.136	–	–	–
Dias et al.	2021	1.76	2.16	–	12	-0.069	–	–	–
Cantat-Gaudin et al.	2020	1.99	1.51	–	219	–	–	–	–
Kounkel et al.	2020	1.72	1.90	–	126	–	–	–	–
Cantat-Gaudin & Anders	2020	1.82	–	–	–	–	–	–	–
Monteiro & Dias	2019	1.69	1.79	–	24	0.034	–	–	–
Cantat-Gaudin et al.	2019	1.82	–	–	–	–	–	–	–

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

Visualization

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