Bochum 4

(MWSC 1254)

0.90 UTI

0.76

C_N

1.0

C_dens

0.75

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 115

Stellar density (N₅₀/rad) 5.7 [N/pc²]

C3 classification AB

C_N 0.76 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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Bochum 4 is a rich, very dense object of high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close Low extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Bochum 4 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–	112.914	-17.202	0.763	-3.024	1.891	34.549
Li et al.	2025	112.877	-17.229	0.761	-3.014	1.848	–
Almeida et al.	2025	112.882	-17.216	–	–	–	–
Hunt & Reffert	2024	112.897	-17.199	0.765	-3.002	1.899	34.858
Cavallo et al.	2024	112.904	-17.163	0.763	–	–	–
Hunt & Reffert	2023	112.897	-17.199	0.765	-3.002	1.899	34.858
Almeida et al.	2023	112.883	-17.212	–	–	–	–
Just et al.	2023	112.899	-17.188	–	–	–	–
Tarricq et al.	2022	112.886	-17.24	0.766	-3.016	1.889	–
Dias et al.	2021	112.882	-17.216	0.764	-3.019	1.85	–
Cantat-Gaudin et al.	2020	112.877	-17.229	0.761	-3.014	1.848	–
Cantat-Gaudin & Anders	2020	112.877	-17.229	0.761	-3.014	1.848	–
Cantat-Gaudin et al.	2018	112.877	-17.229	0.761	-3.014	1.848	–
Loktin & Popova	2017	112.905	-17.192	–	-2.462	0.594	16.0
Kharchenko et al.	2016	112.899	-17.188	–	–	–	–
Dias et al.	2014	112.904	-17.193	–	-2.4	0.11	–
Kharchenko et al.	2013	112.905	-17.19	–	-0.43	0.39	16.0
Gozha et al.	2012	112.904	-17.193	–	–	–	–
Piskunov et al.	2008	112.899	-17.192	–	–	–	–
Kharchenko et al.	2007	112.9	-17.19	–	0.13	–	16.0
van den Bergh	2006	112.9	-17.183	–	–	–	–
Kharchenko et al.	2005	112.9	-17.19	–	-1.69	0.49	16.0
Kharchenko et al.	2003	112.74	-16.92	–	-2.04	-0.44	–
Dias et al.	2002	112.904	-17.193	–	-2.4	0.11	16.0
Dambis	1999	112.904	-17.193	–	–	–	–

💡 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–	1.25	0.64	0.51	123	-0.055	93	0.47	–
Li et al.	2025	1.19	0.64	–	154	-0.158	–	–	–
Almeida et al.	2025	1.26	0.77	–	335	–	141	–	–
Hunt & Reffert	2024	–	–	–	–	–	289⁽¹⁾	–	–
Cavallo et al.	2024	1.29	0.66	–	151	0.060	–	–	–
Hunt & Reffert	2023	1.23	0.46	0.51	248	–	–	–	–
Almeida et al.	2023	1.26	0.75	–	175	-0.080	93⁽¹⁾	0.47	–
Just et al.	2023	–	–	–	257	–	18	–	–
Tarricq et al.	2022	1.24	–	–	91	–	–	–	–
Dias et al.	2021	1.26	0.77	–	335	-0.030	–	–	–
Cantat-Gaudin et al.	2020	1.29	0.39	–	95	–	–	–	–
Cantat-Gaudin & Anders	2020	1.27	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.27	–	–	–	–	–	–	–
Loktin & Popova	2017	0.87	0.59	–	37	–	–	–	–
Kharchenko et al.	2016	0.87	0.64	–	257	–	–	–	–
Kharchenko et al.	2013	0.87	0.64	–	257	–	–	–	–
Gozha et al.	2012	2.29	–	–	10	–	10	–	–
Piskunov et al.	2008	0.87	0.59	–	18	–	–	–	–
van den Bergh	2006	2.29	1.95	–	10	–	–	–	–
Kharchenko et al.	2005	0.87	0.59	–	18	–	–	–	–
Kharchenko et al.	2003	0.87	0.59	–	–	–	–	–	–
Dias et al.	2002	2.29	1.95	–	10	–	–	–	–
Dambis	1999	0.71	0.58	–	32	–	–	–	–

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

Visualization

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