Collinder 307

(MWSC 2427; FoF 863)

0.91 UTI

0.81

C_N

1.0

C_dens

1.0

C_C3

0.86

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 256

Radius (P>50% members) 3.9 [arcmin]

C_N 0.81 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.86 Well-studied
C_dup 1.0 Unique

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

Overview

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Collinder 307 is a rich, very dense object of very 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, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 307 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	–	248.785	-50.989	0.506	-0.761	-3.324	-41.949
Almeida et al.	2025	248.794	-50.989	–	–	–	–
Hunt & Reffert	2024	248.793	-50.985	0.508	-0.763	-3.331	-35.337
Cavallo et al.	2024	248.788	-50.984	0.511	–	–	–
Hunt & Reffert	2023	248.793	-50.985	0.508	-0.763	-3.331	-35.337
Almeida et al.	2023	248.792	-50.999	–	–	–	–
Just et al.	2023	248.822	-50.989	–	–	–	–
Dias et al.	2021	248.794	-50.989	0.482	-0.713	-3.33	–
Cantat-Gaudin et al.	2020	248.792	-50.99	0.484	-0.715	-3.339	–
Sánchez et al.	2020	248.833	-51.0	–	-0.704	-3.032	–
Cantat-Gaudin & Anders	2020	248.792	-50.99	0.484	-0.715	-3.339	–
Liu & Pang	2019	248.808	-50.999	0.491	-0.741	-3.316	–
Cantat-Gaudin et al.	2018	248.792	-50.99	0.484	-0.715	-3.339	–
Kharchenko et al.	2016	248.822	-50.989	–	–	–	–
Dias et al.	2014	248.833	-51.0	–	-0.55	-3.5	–
Kharchenko et al.	2013	248.833	-50.99	–	-3.41	-0.04	–
Dias et al.	2002	248.833	-51.0	–	-0.65	-3.69	–

💡 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	1.68	2.55	–	82	–	764	–	–
Hunt & Reffert	2024	–	–	–	–	–	1707*	–	–
Cavallo et al.	2024	2.23	2.72	–	257	0.830	–	–	–
Hunt & Reffert	2023	1.84	2.71	1.89	187	–	–	–	–
Almeida et al.	2023	1.70	2.59	–	142	0.171	713*	0.61	–
Just et al.	2023	–	–	–	18	–	211	–	–
Dias et al.	2021	1.68	2.55	–	82	0.203	–	–	–
Cantat-Gaudin et al.	2020	2.10	2.11	–	245	–	–	–	–
Cantat-Gaudin & Anders	2020	1.95	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	576	0.250	–	–	–
Cantat-Gaudin et al.	2018	1.95	–	–	–	–	–	–	–
Kharchenko et al.	2016	2.06	3.61	–	18	–	–	–	–
Kharchenko et al.	2013	2.06	3.61	–	18	–	–	–	–
Dias et al.	2002	1.55	2.57	–	251	–	–	–	–

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

Visualization

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