Collinder 161

(VDBH 9; NGC 2451; NGC 2451A; MWSC 1308; OCL 716; vdBergh-Hagen 9; ESO 311 08; Escorial 24; FoF 2437; OCSN 230)

0.98 UTI

0.9

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 492

Stellar density (N₅₀/rad) 35.4 [N/pc²]

C3 classification AA

C_N 0.9 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

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

Overview

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Collinder 161 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a very close distance, near 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 absorption and mass parameters (see Parameters). It is very well-studied in the literature.

Very close Low extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Collinder 161 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–	115.775	-38.26	5.198	-21.001	15.361	23.453
Li et al.	2025	115.736	-38.264	5.165	-21.116	15.328	–
Almeida et al.	2025	115.752	-38.278	–	–	–	–
Alfonso et al.	2024	115.781	-38.151	5.145	-20.891	15.211	–
Hunt & Reffert	2024	115.971	-38.241	5.196	-20.987	15.327	25.247
Cavallo et al.	2024	115.751	-38.24	5.197	–	–	–
Hunt & Reffert	2023	115.971	-38.241	5.196	-20.987	15.327	25.247
Almeida et al.	2023	115.954	-38.234	–	–	–	–
Qin et al.	2023	115.65	-38.29	5.16	-20.93	15.12	23.89
Just et al.	2023	115.33	-38.518	–	–	–	–
He et al.	2022	115.762	-38.277	5.202	-20.956	15.393	–
Rain et al.	2021	115.736	-38.264	5.165	-21.116	15.328	–
Dias et al.	2021	115.752	-38.278	5.15	-21.058	15.332	23.266
Cantat-Gaudin et al.	2020	115.736	-38.264	5.165	-21.116	15.328	–
Cantat-Gaudin & Anders	2020	115.736	-38.264	5.165	-21.116	15.328	–
Liu & Pang	2019	115.735	-38.2	5.146	-20.919	15.265	–
Bossini et al.	2019	115.736	-38.264	–	–	–	–
Soubiran et al.	2018	115.736	-38.264	–	–	–	23.59
Bica et al.	2019	116.311	-37.953	–	–	–	–
Cantat-Gaudin et al.	2018	115.736	-38.264	5.165	-21.116	15.328	–
Yen et al.	2018	115.636	-38.329	5.27	-21.21	15.42	–
Loktin & Popova	2017	115.8	-38.4	–	-22.93	13.39	22.6
Kharchenko et al.	2016	115.33	-38.518	–	–	–	–
Dias et al.	2014	115.8	-38.4	–	-0.2	3.18	–
Kharchenko et al.	2013	115.335	-38.52	–	-21.8	15.13	22.6
Gozha et al.	2012	115.8	-38.4	–	–	–	–
Piskunov et al.	2008	115.316	-38.523	–	–	–	–
Kharchenko et al.	2007	115.8	-38.4	–	1.65	–	22.63
Piskunov et al.	2007	115.316	-38.523	–	–	–	–
Kharchenko et al.	2005	115.32	-38.53	–	-21.8	15.09	21.71
Kharchenko et al.	2003	116.2	-38.04	–	-22.93	13.39	–
Dias et al.	2002	115.8	-38.4	–	-22.93	13.39	22.7
Dambis	1999	116.35	-37.967	–	–	–	–

💡 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–	0.19	0.035	0.45	55	0.000	222	0.24	0.0
Li et al.	2025	0.18	0.11	–	53	-0.156	–	–	–
Almeida et al.	2025	0.19	0.07	–	55	–	222	–	–
Alfonso et al.	2024	0.20	0.00	–	43	0.050	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	185⁽¹⁾	–	–
Cavallo et al.	2024	0.19	0.36	–	30	-0.060	–	–	–
Hunt & Reffert	2023	0.19	0.04	0.45	26	–	–	–	–
Almeida et al.	2023	0.19	0.07	–	52	0.045	342⁽¹⁾	0.24	–
Qin et al.	2023	0.19	0.03	–	56	–	–	–	–
Just et al.	2023	–	–	–	58	–	31	–	–
He et al.	2022	–	0.45	–	63	–	–	–	–
Rain et al.	2021	0.19	0.00	–	44	–	–	–	0
Dias et al.	2021	0.19	0.07	–	55	0.050	–	–	–
Cantat-Gaudin et al.	2020	0.20	0.00	–	35	–	–	–	–
Cantat-Gaudin & Anders	2020	0.19	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	40	0.000	–	–	–
Bossini et al.	2019	0.19	0.00	–	44	0.000	–	–	–
Soubiran et al.	2018	0.19	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	0.19	–	–	–	–	–	–	–
Yen et al.	2018	0.20	0.04	–	148	–	–	–	–
Loktin & Popova	2017	0.21	0.15	–	34	–	–	–	–
Kharchenko et al.	2016	0.19	0.00	–	58	–	–	–	–
Kharchenko et al.	2013	0.19	0.00	–	58	-0.531	–	–	–
Gozha et al.	2012	0.19	–	–	60	0.000	219	–	–
Piskunov et al.	2008	0.19	0.00	–	58	–	405⁽¹⁾	–	–
Piskunov et al.	2007	0.19	0.00	–	58	–	258	–	–
Kharchenko et al.	2005	0.19	0.00	–	58	–	–	–	–
Kharchenko et al.	2003	0.22	0.31	–	–	–	–	–	–
Dias et al.	2002	0.19	0.03	–	60	0.000	–	–	–
Dambis	1999	0.15	0.20	–	50	–	–	–	–

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

Visualization

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