VDB 1

(vdBergh 1; MWSC 934; CV Mon; OCL 527; FSR 1042)

0.85 UTI

0.62

C_N

1.0

C_dens

0.62

C_C3

1.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 75

Stellar density (N₅₀/rad) 74.9 [N/pc²]

C3 classification CA

C_N 0.62 Moderately populated
C_dens 1.0 Very dense
C_C3 0.62 Intermediate 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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VDB 1 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is very well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for VDB 1 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–	99.278	3.079	0.552	0.39	-0.702	9.352
Almeida et al.	2025	99.281	3.074	–	–	–	–
Hunt & Reffert	2024	99.273	3.079	0.554	0.388	-0.711	9.351
Cavallo et al.	2024	99.282	3.074	0.555	–	–	–
Hunt & Reffert	2023	99.273	3.079	0.554	0.388	-0.711	9.351
Just et al.	2023	99.248	3.071	–	–	–	–
Dias et al.	2021	99.281	3.074	0.521	0.343	-0.786	–
Cantat-Gaudin et al.	2020	99.275	3.078	0.523	0.396	-0.771	–
Sánchez et al.	2020	99.25	3.067	–	0.6	-0.78	–
Cantat-Gaudin & Anders	2020	99.275	3.078	0.523	0.396	-0.771	–
Bica et al.	2019	99.282	3.089	–	–	–	–
Cantat-Gaudin et al.	2018	99.275	3.078	0.523	0.396	-0.771	–
Loktin & Popova	2017	99.255	3.068	–	-0.088	-0.096	19.3
Kharchenko et al.	2016	99.248	3.071	–	–	–	–
Dias et al.	2014	99.25	3.067	–	-0.72	-2.76	–
Kharchenko et al.	2013	99.255	3.07	–	-0.29	-0.53	19.3
Gozha et al.	2012	99.25	3.067	–	–	–	–
Kharchenko et al.	2007	99.25	3.07	–	0.04	–	–
van den Bergh	2006	99.278	3.079	–	–	–	–
Chen et al.	2003	99.232	3.119	–	-4.78	-3.63	18.9
Dias et al.	2002	99.25	3.067	–	3.76	-4.78	16.4
Dambis	1999	99.25	3.067	–	–	–	–

💡 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–	1.69	2.26	2.1	106	0.444	188	–	–
Almeida et al.	2025	1.72	2.30	–	52	–	188	–	–
Hunt & Reffert	2024	–	–	–	–	–	401⁽¹⁾	–	–
Cavallo et al.	2024	1.90	2.28	–	380	0.570	–	–	–
Hunt & Reffert	2023	1.70	2.37	2.10	175	–	–	–	–
Just et al.	2023	–	–	–	207	–	166	–	–
Dias et al.	2021	1.72	2.30	–	52	0.318	–	–	–
Cantat-Gaudin et al.	2020	1.95	1.89	–	41	–	–	–	–
Cantat-Gaudin & Anders	2020	1.81	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.81	–	–	–	–	–	–	–
Loktin & Popova	2017	1.56	2.12	–	107	–	–	–	–
Kharchenko et al.	2016	1.49	2.26	–	207	–	–	–	–
Kharchenko et al.	2013	1.49	2.26	–	207	–	–	–	–
Gozha et al.	2012	1.69	–	–	106	–	–	–	–
van den Bergh	2006	1.69	2.20	–	105	–	–	–	–
Chen et al.	2003	1.69	–	–	100	–	–	–	–
Dias et al.	2002	1.69	2.20	–	106	–	–	–	–
Dambis	1999	1.45	2.12	–	79	–	–	–	–

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

Visualization

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