COIN-Gaia 26

(COIN 26)

0.77 UTI

0.73

C_N

1.0

C_dens

0.75

C_C3

0.69

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 96

Radius (P>50% members) 4.7 [arcmin]

C_N 0.73 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.69 Moderately studied
C_dup 1.0 Unique

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

Overview

COIN-Gaia 26 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, below 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.

Note: This object shares a large percentage of members with 3 later reported entries. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024): Gold sample.

Data

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	83.77	15.72	0.703	0.254	-2.395	10.424
Almeida et al.	2025	83.807	15.714	–	–	–	–
Zhang et al.	2024	83.773	15.707	–	–	–	–
Hunt & Reffert	2024	83.773	15.707	0.699	0.263	-2.404	15.182
Cavallo et al.	2024	83.796	15.714	0.705	–	–	–
Hunt & Reffert	2023	83.773	15.707	0.699	0.263	-2.404	15.182
He et al.	2022	83.768	15.682	0.799	0.257	-2.38	–
Tarricq et al.	2022	83.758	15.732	0.702	0.257	-2.4	–
Dias et al.	2021	83.807	15.714	0.686	0.263	-2.403	–
Cantat-Gaudin et al.	2020	83.771	15.721	0.688	0.267	-2.376	–
Monteiro & Dias	2019	83.771	15.721	–	–	–	2.901
Cantat-Gaudin et al.	2019	83.771	15.721	0.69	0.27	-2.39	–

💡 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
Almeida et al.	2025	1.31	1.74	–	157	–	383	–	–
Zhang et al.	2024	–	–	–	–	-0.132*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	446*	–	–
Cavallo et al.	2024	1.45	1.38	–	363	0.430	–	–	–
Hunt & Reffert	2023	1.32	1.45	0.48	175	–	–	–	–
He et al.	2022	–	1.75	–	71	–	–	–	–
Tarricq et al.	2022	1.39	–	–	186	–	–	–	–
Dias et al.	2021	1.31	1.74	–	157	-0.017	–	–	–
Cantat-Gaudin et al.	2020	1.45	1.32	–	170	–	–	–	–
Monteiro & Dias	2019	1.56	1.44	–	137	0.019	–	–	–
Cantat-Gaudin et al.	2019	1.40	–	–	–	–	–	–	–

💡 Note: The parameters are sometimes transformed from their original values to match the format of the columns shown here, see FAQ. The columns DAv, Bfr, BSS correspond to differential extinction, binary fraction, and blue stragglers, respectively. BSS values can be listed as fractions or integers.
(*): indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
LISC 0988	100.0	83.77	15.72	0.7	0.25	-2.39	10.42	0.04
UBC 75	95.8	83.77	15.72	0.7	0.26	-2.4	10.42	0.03
CWWDL 3284	91.7	83.77	15.72	0.7	0.25	-2.39	10.42	0.0

💡 Note: The % column shows the percentage of members that COIN-Gaia 26 shares with each listed object.

Visualization

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💡 Note: How are the galactocentric plots generated? See FAQ.