Bochum 2

(MWSC 991)

0.41 UTI

0.0

C_N

0.17

C_dens

0.25

C_C3

0.81

C_lit

1.0

C_dup

N₅₀ (P>50% members) 19

Stellar density (N₅₀/rad) 0.9 [N/pc²]

C3 classification DB

C_N 0.0 Sparse
C_dens 0.17 Very loose
C_C3 0.25 Low quality
C_lit 0.81 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 2 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is well-studied in the literature.

(*): The parallax distance estimate (~5.36 kpc) differs significantly from the median photometric distance (~2.78 kpc).

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Relatively close Moderate extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for Bochum 2 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–	102.214	0.378	0.186	-0.266	0.236	84.125
Hunt & Reffert	2024	102.207	0.377	0.192	-0.309	0.24	–
Cavallo et al.	2024	102.21	0.416	0.19	–	–	–
Hunt & Reffert	2023	102.207	0.377	0.192	-0.309	0.24	–
Just et al.	2023	102.203	0.382	–	–	–	–
Jaehnig et al.	2021	102.21	0.378	0.161	-0.316	0.228	–
Loktin & Popova	2017	102.225	-0.383	–	-0.05	-1.68	67.0
Kharchenko et al.	2016	102.203	0.382	–	–	–	–
Dias et al.	2014	102.225	0.383	–	-0.03	-1.73	–
Kharchenko et al.	2013	102.21	0.38	–	1.37	-3.01	67.0
Gozha et al.	2012	102.225	0.383	–	–	–	–
Bukowiecki et al.	2011	102.204	0.378	–	–	–	–
Kharchenko et al.	2007	102.22	0.38	–	0.01	–	–
van den Bergh	2006	102.225	0.383	–	–	–	–
Dias et al.	2002	102.225	0.383	–	-0.05	-1.68	66.3
Dambis	1999	102.225	0.383	–	–	–	–

💡 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–	2.78	2.63	2.41	5	0.110	336	–	–
Hunt & Reffert	2024	–	–	–	–	–	662⁽¹⁾	–	–
Cavallo et al.	2024	4.94	2.77	–	52	0.110	–	–	–
Hunt & Reffert	2023	4.48	2.62	2.41	79	–	–	–	–
Just et al.	2023	–	–	–	5	–	82	–	–
Jaehnig et al.	2021	6.19⁽¹⁾	–	–	–	–	–	–	–
Loktin & Popova	2017	2.97	2.63	–	5	–	–	–	–
Kharchenko et al.	2016	2.78	2.71	–	5	–	–	–	–
Kharchenko et al.	2013	2.78	2.71	–	5	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	336	–	–
Gozha et al.	2012	2.66	–	–	5	–	–	–	–
Bukowiecki et al.	2011	2.50⁽¹⁾	0.74	–	178	–	–	–	–
van den Bergh	2006	2.66	2.57	–	5	–	–	–	–
Dias et al.	2002	2.66	2.58	–	5	–	–	–	–
Dambis	1999	6.43	2.77	–	3	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 4122	84.0	102.22	0.38	0.18	-0.24	0.22	84.13	0.01

💡 Note: The % column shows the percentage of members that Bochum 2 shares with each listed object.

Visualization

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