Collinder 28

(NGC 957; MWSC 211; OCL 362; FSR 0603)

0.96 UTI

0.8

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 221

Stellar density (N₅₀/rad) 20.5 [N/pc²]

C3 classification AA

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 1.0 Very well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Collinder 28 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

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

Relatively close Moderate extinction Massive Near-solar metallicity Very young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 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	99999–	38.342	57.55	0.417	-0.284	-1.104	-37.485
Li et al.	2025	38.343	57.553	0.405	-0.252	-1.073	–
Wei et al.	2025	38.342	57.548	0.413	-0.296	-1.098	–
Almeida et al.	2025	38.36	57.552	–	–	–	–
Zhang et al.	2024	38.362	57.557	–	–	–	–
Hunt & Reffert	2024	38.362	57.557	0.419	-0.268	-1.108	-37.47
Cavallo et al.	2024	38.539	57.58	0.42	–	–	–
Hunt & Reffert	2023	38.362	57.557	0.419	-0.268	-1.108	-37.47
Almeida et al.	2023	38.37	57.55	–	–	–	–
Just et al.	2023	38.365	57.571	–	–	–	–
Jaehnig et al.	2021	38.332	57.554	0.434	-0.248	-1.054	–
Rain et al.	2021	38.343	57.553	0.405	-0.252	-1.073	–
Dias et al.	2021	38.36	57.552	0.405	-0.254	-1.069	–
Cantat-Gaudin et al.	2020	38.343	57.553	0.405	-0.252	-1.073	–
Cantat-Gaudin & Anders	2020	38.343	57.553	0.405	-0.252	-1.073	–
Bica et al.	2019	38.355	57.551	–	–	–	–
Cantat-Gaudin et al.	2018	38.343	57.553	0.405	-0.252	-1.073	–
Loktin & Popova	2017	38.34	57.561	–	-0.189	0.12	-40.9
Kharchenko et al.	2016	38.365	57.571	–	–	–	–
Dias et al.	2014	38.337	57.56	–	-1.33	-0.14	–
Kharchenko et al.	2013	38.377	57.573	–	-1.01	1.39	-40.9
Gozha et al.	2012	38.338	57.56	–	–	–	–
Kharchenko et al.	2012	38.377	57.573	–	-1.41	1.39	-40.88
Piskunov et al.	2008	38.321	57.558	–	–	–	–
Kharchenko et al.	2007	38.34	57.56	–	0.22	–	-39.5
Piskunov et al.	2007	38.321	57.558	–	–	–	–
van den Bergh	2006	38.35	57.567	–	–	–	–
Kharchenko et al.	2005	38.34	57.56	–	1.15	-1.52	-39.5
Kharchenko et al.	2003	38.32	57.55	–	1.65	-1.08	–
Chen et al.	2003	38.391	57.597	–	1.11	0.28	-36.0
Dias et al.	2002	38.337	57.56	–	-1.33	-0.14	-34.34
Dambis	1999	38.337	57.56	–	–	–	–

💡 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–	2.05	2.23	1.0	16	-0.037	1539	0.385	0.0
Li et al.	2025	2.08	2.36	–	17	-0.049	–	–	–
Wei et al.	2025	2.99	2.03	–	17	0.500	5832	0.19	–
Almeida et al.	2025	2.07	2.23	–	25	–	1086	–	–
Zhang et al.	2024	–	–	–	–	-0.293⁽¹⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	1992⁽¹⁾	–	–
Cavallo et al.	2024	2.65	2.23	–	15	0.380	–	–	–
Hunt & Reffert	2023	2.24	2.22	1.00	20	–	–	–	–
Almeida et al.	2023	2.05	2.29	–	24	-0.029	2071⁽¹⁾	0.58	–
Just et al.	2023	–	–	–	18	–	783	–	–
Jaehnig et al.	2021	2.28⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	2.30	2.20	–	10	–	–	–	0
Dias et al.	2021	2.07	2.23	–	25	-0.046	–	–	–
Cantat-Gaudin et al.	2020	2.62	1.98	–	42	–	–	–	–
Cantat-Gaudin & Anders	2020	2.30	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.30	–	–	–	–	–	–	–
Loktin & Popova	2017	1.85	2.59	–	11	–	–	–	–
Kharchenko et al.	2016	1.90	1.96	–	18	–	–	–	–
Kharchenko et al.	2013	1.90	1.96	–	18	–	–	–	–
Gozha et al.	2012	1.81	–	–	10	–	708	–	–
Kharchenko et al.	2012	1.90	1.96	–	18	–	–	–	–
Piskunov et al.	2008	1.81	2.60	–	7	–	2000⁽¹⁾	–	–
Piskunov et al.	2007	1.81	2.60	–	7	–	301	–	–
van den Bergh	2006	1.81	2.60	–	11	–	–	–	–
Kharchenko et al.	2005	1.81	2.60	–	7	–	–	–	–
Kharchenko et al.	2003	1.82	2.48	–	–	–	–	–	–
Chen et al.	2003	1.81	–	–	10	–	–	–	–
Dias et al.	2002	2.20	2.20	–	10	–	–	–	–
Dambis	1999	1.72	2.42	–	13	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0253	14.5	38.37	57.55	0.46	-0.27	-1.12	–	0.02
UBC 606	2.7	37.62	57.27	0.41	-0.28	-1.13	–	0.09

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

Visualization

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