VDBH 55

(van den Bergh-Hagen 55; BH 55; vdBergh-Hagen 55; MWSC 1600; ESO 314 01; FSR 1404)

0.78 UTI

0.8

C_N

1.0

C_dens

0.75

C_C3

0.68

C_lit

1.0

C_dup

N_m (P>50%) 241

Core radius and density 1.6 [pc], 5.4 [pc^-2]

C3 classification AB

C_N 0.8 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.68 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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VDBH 55 is a rich, very 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 massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is moderately studied in the literature.

Note: This object contains blue stragglers according to at least one source.

Distant Moderate extinction Massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.31 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.31 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.1479, e_all=0.0738.

Data

🔍 Search references for VDBH 55 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–	134.04	-39.517	0.213	-3.935	3.136	32.809
Hu & Soubiran	2025	134.03	-39.503	–	–	–	–
Almeida et al.	2025	134.043	-39.516	–	–	–	–
Hunt & Reffert	2024	134.041	-39.522	0.223	-3.93	3.126	38.761
Cavallo et al.	2024	134.03	-39.503	0.218	–	–	–
Hunt & Reffert	2023	134.041	-39.522	0.223	-3.93	3.126	38.761
Just et al.	2023	134.042	-39.507	–	–	–	–
Jadhav & Subramaniam	2021	134.042	-39.518	–	–	–	–
Dias et al.	2021	134.043	-39.516	0.188	-3.992	3.14	32.779
Cantat-Gaudin et al.	2020	134.042	-39.518	0.185	-3.971	3.118	–
Cantat-Gaudin & Anders	2020	134.042	-39.518	0.185	-3.971	3.118	–
Soubiran et al.	2018	134.042	-39.518	–	–	–	35.15
Bica et al.	2019	134.031	-39.517	–	–	–	–
Cantat-Gaudin et al.	2018	134.042	-39.518	0.185	-3.971	3.118	–
Dias et al.	2018	–	–	–	-4.2	2.22	–
Sampedro et al.	2017	134.046	-39.517	–	-2.25	0.86	–
Kharchenko et al.	2016	134.042	-39.507	–	–	–	–
Dias et al.	2014	134.046	-39.517	–	-2.09	1.87	–
Kharchenko et al.	2013	134.047	-39.51	–	-5.28	6.55	–
Bukowiecki et al.	2011	134.042	-39.52	–	–	–	–
Dias et al.	2002	134.046	-39.517	–	-4.9	6.97	–
Lynga	1987	134.021	-39.523	–	–	–	–
van den Bergh & Hagen	1975	133.55	-39.333	–	–	–	–

💡 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–	4.34	1.855	2.24	1122	-0.125	1212	–	1
Hu & Soubiran	2025	–	–	–	–	-0.080⁽⁵⁾	–	–	–
Almeida et al.	2025	4.64	1.79	–	2483	–	1037	–	–
Hunt & Reffert	2024	4.04	2.02	2.24	587	–	1138⁽¹⁾	–	–
Cavallo et al.	2024	3.33	2.20	–	1318	-0.410	–	–	–
Hunt & Reffert	2023	4.04	2.02	2.24	587	–	–	–	–
Just et al.	2023	–	–	–	28	–	1285	–	–
Jadhav & Subramaniam	2021	4.79	1.22	–	2291	–	1447	–	1⁽¹⁾
Dias et al.	2021	4.64	1.79	–	2483	-0.125	–	–	–
Cantat-Gaudin et al.	2020	4.79	1.22	–	2291	–	–	–	–
Kounkel et al.	2020	4.34	1.92	–	1000	–	–	–	–
Cantat-Gaudin & Anders	2020	4.67	–	–	–	–	–	–	–
Soubiran et al.	2018	4.67	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	4.67	–	–	–	–	–	–	–
Kharchenko et al.	2016	3.64	6.80	–	28	–	–	–	–
Kharchenko et al.	2013	3.64	6.80	–	28	–	–	–	–
Bukowiecki et al.	2011	4.13⁽¹⁾	1.29	–	1122	–	–	–	–
Dias et al.	2002	4.11	1.32	–	1122	–	–	–	–

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

Visualization

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