Trumpler 5

(Collinder 105; MWSC 933; OCL 494; FSR 0989; FoF 369)

1.0 UTI

1.0

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 4578

Radius (P>50% members) 7.8 [arcmin]

C3 classification AA

C_N 1.0 Very 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 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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Trumpler 5 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by moderate extinction. It is catalogued as an extremely massive, near-solar metallicity, old 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 contains blue stragglers according to at least one source.

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

Distant Moderate extinction Extremely massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Trumpler 5 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–	99.125	9.468	0.302	-0.612	0.267	50.75
Li et al.	2025	99.126	9.465	0.284	-0.59	0.273	–
Hu & Soubiran	2025	99.126	9.472	–	–	–	–
Carrasco-Varela et al.	2025	99.36	9.427	–	–	–	–
Almeida et al.	2025	99.128	9.46	–	–	–	–
Hunt & Reffert	2024	99.127	9.459	0.302	-0.618	0.269	51.318
Cavallo et al.	2024	99.126	9.472	0.301	–	–	–
Hunt & Reffert	2023	99.127	9.459	0.302	-0.618	0.269	51.318
Just et al.	2023	99.112	9.472	–	–	–	–
Jaehnig et al.	2021	99.129	9.472	0.312	-0.606	0.29	–
Rain et al.	2021	99.126	9.465	0.284	-0.59	0.273	–
Dias et al.	2021	99.128	9.46	0.283	-0.586	0.285	51.472
Cantat-Gaudin et al.	2020	99.126	9.465	0.284	-0.59	0.273	–
Donor et al.	2020	99.12	9.47	–	-0.58	0.23	50.5
Cantat-Gaudin & Anders	2020	99.126	9.465	0.284	-0.59	0.273	–
Liu & Pang	2019	99.127	9.475	0.317	-0.544	0.248	–
Soubiran et al.	2018	99.126	9.465	–	–	–	51.33
Bica et al.	2019	99.119	9.455	–	–	–	–
Cantat-Gaudin et al.	2018	99.126	9.465	0.284	-0.59	0.273	–
Loktin & Popova	2017	99.18	9.434	–	-0.127	-0.371	–
Kharchenko et al.	2016	99.112	9.472	–	–	–	–
Dias et al.	2014	99.175	9.433	–	0.77	0.59	–
Kharchenko et al.	2013	99.12	9.47	–	-0.24	-0.37	–
Gozha et al.	2012	99.175	9.433	–	–	–	–
van den Bergh	2006	99.175	9.433	–	–	–	–
Dias et al.	2002	99.175	9.433	–	0.77	0.59	–

💡 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–	3.12	1.94	2.17	3459	-0.336	24555	–	0.09
Li et al.	2025	3.04	2.05	–	3752	-0.441	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.230⁽⁵⁾	–	–	–
Carrasco-Varela et al.	2025	3.26	2.02	–	3459	-0.400	–	–	0.09⁽¹⁾
Almeida et al.	2025	3.26	2.02	–	3459	–	26209	–	–
Hunt & Reffert	2024	–	–	–	–	–	24555⁽¹⁾	–	–
Cavallo et al.	2024	2.94	1.79	–	3311	-0.080	–	–	–
Hunt & Reffert	2023	2.96	1.71	2.17	2173	–	–	–	–
Just et al.	2023	–	–	–	3162	–	2844	–	–
Jaehnig et al.	2021	3.22⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	3.19	1.92	–	3981	–	–	–	103
Dias et al.	2021	3.26	2.02	–	3459	-0.372	–	–	–
Cantat-Gaudin et al.	2020	3.05	1.20	–	4266	–	–	–	–
Donor et al.	2020	–	–	–	–	-0.440	–	–	–
Cantat-Gaudin & Anders	2020	3.19	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1660	0.000	–	–	–
Soubiran et al.	2018	3.19	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.19	–	–	–	–	–	–	–
Loktin & Popova	2017	4.66	2.33	–	1698	–	–	–	–
Kharchenko et al.	2016	2.75	1.94	–	3162	–	–	–	–
Kharchenko et al.	2013	2.75	1.94	–	3162	-0.300	–	–	–
Gozha et al.	2012	2.40	–	–	5012	-0.300	–	–	–
van den Bergh	2006	3.00	1.80	–	4074	–	–	–	–
Dias et al.	2002	2.82	1.92	–	3981	-0.403	–	–	–

(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 0336	0.5	99.1	9.52	0.48	-0.54	0.21	40.26	0.0
OC 0337	0.5	99.2	9.4	0.33	-0.7	0.27	50.39	0.0

💡 Note: The % column shows the percentage of members that Trumpler 5 shares with each listed object.

Visualization

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