Berkeley 55

(MWSC 3490)

0.90 UTI

0.82

C_N

1.0

C_dens

1.0

C_C3

0.84

C_lit

1.0

C_dup

N₅₀ (P>50% members) 277

Stellar density (N₅₀/rad) 88.3 [N/pc²]

C3 classification AA

C_N 0.82 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.84 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

Berkeley 55 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age, metallicity, and mass parameters (see Parameters). It is well-studied in the literature.

Relatively close High extinction Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: invalid due to poor quality CMD. Isochrone match: worst fit.

Cavallo et al. (2024)
Silver sample.

Data

🔍 Search references for Berkeley 55 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	319.236	51.765	0.312	-4.085	-4.653	-45.45
Almeida et al.	2025	319.227	51.763	–	–	–	–
Hunt & Reffert	2024	319.235	51.761	0.325	-4.086	-4.68	-32.001
Cavallo et al.	2024	319.23	51.764	0.325	–	–	–
Hunt & Reffert	2023	319.235	51.761	0.325	-4.086	-4.68	-32.001
Just et al.	2023	319.245	51.761	–	–	–	–
Dias et al.	2021	319.227	51.763	0.304	-4.026	-4.627	-42.456
Cantat-Gaudin et al.	2020	319.232	51.762	0.309	-4.05	-4.618	–
Sánchez et al.	2020	319.242	51.759	–	-3.976	-4.546	–
Cantat-Gaudin & Anders	2020	319.232	51.762	0.309	-4.05	-4.618	–
Soubiran et al.	2018	319.232	51.762	–	–	–	-43.58
Cantat-Gaudin et al.	2018	319.232	51.762	0.309	-4.05	-4.618	–
Loktin & Popova	2017	319.245	51.761	–	-1.135	-2.297	–
Kharchenko et al.	2016	319.245	51.761	–	–	–	–
Kharchenko et al.	2013	319.249	51.765	–	-3.02	-7.83	–
Kharchenko et al.	2012	319.249	51.765	–	-3.02	-7.83	–
Dias et al.	2002	319.242	51.759	–	-5.93	-12.57	–

💡 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–	2.85	4.96	3.07	200	0.175	863	–	–
Almeida et al.	2025	2.58	4.16	–	130	–	863	–	–
Hunt & Reffert	2024	–	–	–	–	–	3609⁽¹⁾	–	–
Cavallo et al.	2024	2.96	5.17	–	47	0.010	–	–	–
Hunt & Reffert	2023	2.85	5.56	3.07	63	–	–	–	–
Just et al.	2023	–	–	–	372	–	10	–	–
Dias et al.	2021	2.58	4.16	–	130	0.341	–	–	–
Cantat-Gaudin et al.	2020	2.75	4.80	–	200	–	–	–	–
Cantat-Gaudin & Anders	2020	2.96	–	–	–	–	–	–	–
Soubiran et al.	2018	2.96	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.96	–	–	–	–	–	–	–
Loktin & Popova	2017	3.66	4.39	–	380	–	–	–	–
Kharchenko et al.	2016	1.70	4.96	–	372	–	–	–	–
Kharchenko et al.	2013	1.70	4.96	–	372	–	–	–	–
Kharchenko et al.	2012	1.70	4.96	–	372	–	–	–	–
Dias et al.	2002	3.98	5.74	–	50	–	–	–	–

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

Visualization

ℹ️

1 2 3