Collinder 181

(VDBH 27; NGC 2571; MWSC 1469; OCL 701; vdBergh-Hagen 27; ESO 431 05; FoF 2146)

0.91 UTI

0.81

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 270

Stellar density (N₅₀/rad) 41.3 [N/pc²]

C3 classification AB

C_N 0.81 Rich
C_dens 1.0 Very dense
C_C3 0.75 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 181 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

Relatively close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 181 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–	124.731	-29.763	0.74	-4.927	4.277	40.335
Li et al.	2025	124.723	-29.775	0.732	-4.902	4.246	–
Wei et al.	2025	124.705	-29.79	0.75	-4.927	4.293	–
Almeida et al.	2025	124.724	-29.772	–	–	–	–
Hunt & Reffert	2024	124.716	-29.756	0.735	-4.92	4.289	38.965
Celli et al.	2024	124.723	-29.775	–	–	–	–
Cavallo et al.	2024	124.729	-29.774	0.735	–	–	–
Hunt & Reffert	2023	124.716	-29.756	0.735	-4.92	4.289	38.965
Almeida et al.	2023	124.731	-29.776	–	–	–	–
Just et al.	2023	124.731	-29.732	–	–	–	–
Jaehnig et al.	2021	124.725	-29.799	0.756	-4.936	4.25	–
Rain et al.	2021	124.723	-29.775	0.732	-4.902	4.246	–
Dias et al.	2021	124.724	-29.772	0.723	-4.89	4.271	–
Cantat-Gaudin et al.	2020	124.723	-29.775	0.732	-4.902	4.246	–
Cantat-Gaudin & Anders	2020	124.723	-29.775	0.732	-4.902	4.246	–
Liu & Pang	2019	124.734	-29.778	0.716	-4.928	4.273	–
Bica et al.	2019	124.724	-29.76	–	–	–	–
Cantat-Gaudin et al.	2018	124.723	-29.775	0.732	-4.902	4.246	–
Loktin & Popova	2017	124.74	-29.75	–	-3.86	6.4	27.0
Kharchenko et al.	2016	124.731	-29.732	–	–	–	–
Dias et al.	2014	124.733	-29.75	–	-2.13	2.51	–
Kharchenko et al.	2013	124.735	-29.735	–	-3.38	3.95	27.0
Gozha et al.	2012	124.733	-29.75	–	–	–	–
Piskunov et al.	2008	124.727	-29.746	–	–	–	–
Piskunov et al.	2007	124.727	-29.746	–	–	–	–
van den Bergh	2006	124.75	-29.75	–	–	–	–
Kharchenko et al.	2005	124.74	-29.75	–	-2.92	4.75	–
Kharchenko et al.	2003	124.72	-29.76	–	-5.98	2.57	–
Chen et al.	2003	124.73	-29.732	–	–	–	–
Dias et al.	2002	124.733	-29.75	–	-3.86	6.4	26.56
Dambis	1999	124.733	-29.75	–	–	–	–

💡 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–	1.33	0.42	0.59	27	0.006	525	0.355	0.0
Li et al.	2025	1.13	0.38	–	27	-0.252	–	–	–
Wei et al.	2025	1.40	0.76	–	26	-0.500	604	0.27	–
Almeida et al.	2025	1.29	0.42	–	33	–	525	–	–
Hunt & Reffert	2024	–	–	–	–	–	640⁽¹⁾	–	–
Celli et al.	2024	–	–	–	27	–	460	–	–
Cavallo et al.	2024	1.25	0.26	–	21	-0.080	–	–	–
Hunt & Reffert	2023	1.28	0.24	0.59	19	–	–	–	–
Almeida et al.	2023	1.25	0.43	–	26	-0.038	345⁽¹⁾	0.44	–
Just et al.	2023	–	–	–	22	–	136	–	–
Jaehnig et al.	2021	1.32⁽¹⁾	–	–	–	–	–	–	–
Rain et al.	2021	1.31	0.40	–	30	–	–	–	0
Dias et al.	2021	1.29	0.42	–	33	0.058	–	–	–
Cantat-Gaudin et al.	2020	1.33	0.29	–	27	–	–	–	–
Cantat-Gaudin & Anders	2020	1.31	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	20	-0.500	–	–	–
Cantat-Gaudin et al.	2018	1.31	–	–	–	–	–	–	–
Loktin & Popova	2017	1.34	0.42	–	33	–	–	–	–
Kharchenko et al.	2016	1.34	0.43	–	22	–	–	–	–
Kharchenko et al.	2013	1.34	0.43	–	22	0.050	–	–	–
Gozha et al.	2012	1.34	–	–	31	0.050	1096	–	–
Piskunov et al.	2008	1.34	0.43	–	17	–	822⁽¹⁾	–	–
Piskunov et al.	2007	1.34	0.43	–	17	–	253	–	–
van den Bergh	2006	1.34	0.43	–	31	–	–	–	–
Kharchenko et al.	2005	1.34	0.43	–	17	–	–	–	–
Kharchenko et al.	2003	1.33	0.34	–	–	–	–	–	–
Chen et al.	2003	1.34	0.42	–	30	0.050⁽¹⁾	–	–	–
Dias et al.	2002	1.34	0.42	–	31	0.050	–	–	–
Dambis	1999	1.12	0.32	–	40	–	–	–	–

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

Visualization

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