COIN-Gaia 8

N_50

r_50

17.4

Summary

COIN-Gaia 8 is a moderately populated, very dense object of very high C3 quality. It is located at a close distance from the Sun, below the mid-plane. It is well-studied in the literature.

This object shares a large percentage of members with 2 later reported entries.

Search object in SciX | Simbad

Positions

Reference	RA	DEC	Plx	pmRA	pmDE	Rv
Cantat-Gaudin et al. (2019)	39.048	50.013	1.36	2.51	-2.49	–
Cantat-Gaudin et al. (2020)	39.048	50.013	1.359	2.51	-2.499	–
Dias et al. (2021)	39.145	50.01	1.361	2.524	-2.521	-9.303
Tarricq et al. (2022)	39.048	49.89	1.37	2.398	-2.513	–
He et al. (2022)	39.189	50.032	1.37	2.39	-2.525	–
Hunt & Reffert (2023)	39.165	50.01	1.379	2.365	-2.527	-8.04
Cavallo et al. (2024)	39.177	50.063	1.381	–	–	–
Hunt & Reffert (2024)	39.165	50.01	1.379	2.365	-2.527	-8.04
Alfonso et al. (2024)	39.161	50.035	1.332	2.374	-2.513	–
Almeida et al. (2025)	39.145	50.01	–	–	–	–

UCC	39.024	50.024	1.374	2.414	-2.51	-7.944

Galactocentric position

How are the galactocentric plots generated?

Search coordinates in CDS | Simbad

Estimated members

1 2 3

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Fundamental parameters

Reference	Values
Cantat-Gaudin et al. (2019)	`d=720`
Cantat-Gaudin et al. (2020)	`AVNN=0.37, DistPc=722.0, AgeNN=8.0`
Dias et al. (2021)	`Av=0.67, Dist=716, logage=8.227, [Fe/H]=-0.018`
Tarricq et al. (2022)	`Dist=708, logAgeNN=8.01`
He et al. (2022)	`A0=0.75, logAge=7.9`
Hunt & Reffert (2023)	`AV50=0.388, diffAV50=0.815, MOD50=9.198, logAge50=8.246`
Cavallo et al. (2024)	`AV50=0.63, dMod50=9.31, logAge50=8.35, [Fe/H]50=0.39`
Hunt & Reffert (2024)	`MassJ=223.101, MassTot=318.487`
Alfonso et al. (2024)	`AV=0.37027, MOD=9.28961, logAge=8.12542, Z=-0.0177`
Almeida et al. (2025)	`AV=0.67, Dist=716, logAge=8.227, MassRk=150.3`

Search coordinates in Bayestar19

Cluster region map

Objects with shared members

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 48	78.9	39.07	50.02	1.38	2.42	-2.52	-8.36	0.01
CWWDL 14301	65.8	39.13	50.0	1.38	2.4	-2.52	-9.87	0.02