COIN-Gaia 28

(COIN 28)

0.76 UTI

0.77

C_N

1.0

C_dens

0.75

C_C3

0.65

C_lit

1.0

C_dup

C3 classification AB

Number of members (P>50%) 155

Radius (P>50% members) 5.5 [arcmin]

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.65 Moderately studied
C_dup 1.0 Unique

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

Overview

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COIN-Gaia 28 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is moderately studied in the literature.

Note: This object shares a large percentage of members with 2 later reported entries. See table with shared members information.

Relatively close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for COIN-Gaia 28 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	–	96.329	11.158	0.592	-1.125	-0.962	29.717
Almeida et al.	2025	96.353	11.15	–	–	–	–
Zhang et al.	2024	96.331	11.163	–	–	–	–
Hunt & Reffert	2024	96.331	11.163	0.596	-1.151	-0.977	9.903
Cavallo et al.	2024	96.323	11.164	0.595	–	–	–
Hunt & Reffert	2023	96.331	11.163	0.596	-1.151	-0.977	9.903
Almeida et al.	2023	96.339	11.145	–	–	–	–
Dias et al.	2021	96.353	11.15	0.61	-1.134	-0.943	–
Cantat-Gaudin et al.	2020	96.333	11.159	0.59	-1.12	-0.942	–
Cantat-Gaudin & Anders	2020	96.333	11.159	0.59	-1.12	-0.942	–
Monteiro & Dias	2019	96.333	11.159	–	–	–	3.082
Cantat-Gaudin et al.	2019	96.333	11.159	0.59	-1.12	-0.94	–

💡 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	1.53	1.13	–	53	–	324	–	–
Zhang et al.	2024	–	–	–	–	-0.009*	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	321*	–	–
Cavallo et al.	2024	1.55	0.96	–	132	-0.100	–	–	–
Hunt & Reffert	2023	1.54	0.80	0.83	121	–	–	–	–
Almeida et al.	2023	1.49	1.07	–	90	-0.105	388*	0.39	–
Dias et al.	2021	1.53	1.13	–	53	-0.047	–	–	–
Cantat-Gaudin et al.	2020	1.60	0.75	–	55	–	–	–	–
Cantat-Gaudin & Anders	2020	1.62	–	–	–	–	–	–	–
Monteiro & Dias	2019	1.52	0.85	–	60	0.007	–	–	–
Cantat-Gaudin et al.	2019	1.62	–	–	–	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 81	97.4	96.33	11.16	0.59	-1.12	-0.96	29.72	0.02
CWWDL 6296	48.4	96.33	11.16	0.59	-1.14	-0.96	29.72	0.0

💡 Note: The % column shows the percentage of members that COIN-Gaia 28 shares with each listed object.

Visualization

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