Bochum 1

(FSR 0911; MWSC 864; BBD 7)

0.69 UTI

0.57

C_N

0.56

C_dens

0.75

C_C3

0.78

C_lit

1.0

C_dup

N₅₀ (P>50% members) 64

Stellar density (N₅₀/rad) 2.8 [N/pc²]

C3 classification AB

C_N 0.57 Moderately populated
C_dens 0.56 Moderately dense
C_C3 0.75 High quality
C_lit 0.78 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Bochum 1 is a moderately populated, moderately dense object of high C3 quality. Its parallax locates it at a moderate^* distance, above 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 (~4.81 kpc) differs significantly from the median photometric distance (~3.13 kpc).

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

Distant Moderate extinction Near-solar metallicity Very young

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for Bochum 1 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	96.267	19.846	0.208	-0.188	-0.465	59.975
Zhang et al.	2024	96.257	19.846	–	–	–	–
Hunt & Reffert	2024	96.257	19.846	0.209	-0.104	-0.506	22.607
Cavallo et al.	2024	96.365	19.833	0.209	–	–	–
Hunt & Reffert	2023	96.257	19.846	0.209	-0.104	-0.506	22.607
Just et al.	2023	96.314	19.781	–	–	–	–
Jaehnig et al.	2021	96.331	19.895	0.234	-0.18	-0.43	–
Bica et al.	2019	96.256	19.855	–	–	–	–
Loktin & Popova	2017	96.36	19.768	–	0.63	-1.64	38.0
Kharchenko et al.	2016	96.314	19.781	–	–	–	–
Dias et al.	2014	96.354	19.767	–	0.63	-1.64	11.38
Kharchenko et al.	2013	96.322	19.78	–	-0.93	-2.82	38.0
Froebrich et al.	2007	96.25	19.867	–	–	–	–
Dias et al.	2002	96.354	19.767	–	0.63	-1.64	11.38
Dambis	1999	96.375	19.767	–	–	–	–

💡 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–	3.135	1.56	2.19	4	-0.160	666	–	–
Hunt & Reffert	2024	–	–	–	–	–	1118⁽¹⁾	–	–
Cavallo et al.	2024	3.31	1.11	–	93	-0.160	–	–	–
Hunt & Reffert	2023	3.90	1.19	2.19	151	–	–	–	–
Just et al.	2023	–	–	–	4	–	215	–	–
Jaehnig et al.	2021	4.59⁽¹⁾	–	–	–	–	–	–	–
Loktin & Popova	2017	2.98	1.45	–	11	–	–	–	–
Kharchenko et al.	2016	3.06	1.62	–	4	–	–	–	–
Kharchenko et al.	2013	3.06	1.62	–	4	–	–	–	–
Dias et al.	2002	2.80	1.56	–	5	–	–	–	–
Dambis	1999	3.21	1.78	–	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
UBC 1309	85.9	96.29	19.85	0.22	-0.22	-0.45	35.13	0.09
OC 0319	39.1	96.26	19.85	0.2	-0.23	-0.47	–	0.0

💡 Note: The % column shows the percentage of members that Bochum 1 shares with each listed object.

Visualization

ℹ️

1 2