Berkeley 44

(MWSC 3082; OCL 110; FSR 0138; FoF 474)

0.89 UTI

0.87

C_N

1.0

C_dens

0.75

C_C3

0.9

C_lit

1.0

C_dup

N_m (P>50%) 427

Core radius and density 1.0 [pc], 23 [pc^-2]

C3 classification AB

C_N 0.87 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.9 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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Berkeley 44 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by high extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

Relatively close High extinction Massive Near-solar metallicity Old

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.71 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.71 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2123, e_all=0.1965.

Data

🔍 Search references for Berkeley 44 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–	289.313	19.552	0.341	-0.044	-2.867	-8.451
Otto et al.	2026	289.314	19.548	–	0.01	-2.83	-9.3
Hu & Soubiran	2025	289.311	19.551	–	–	–	–
Almeida et al.	2025	289.311	19.549	–	–	–	–
Hunt & Reffert	2024	289.314	19.548	0.343	-0.053	-2.878	-10.9
Cavallo et al.	2024	289.311	19.551	0.338	–	–	–
Hunt & Reffert	2023	289.314	19.548	0.343	-0.053	-2.878	-10.9
Just et al.	2023	289.302	19.541	–	–	–	–
Jadhav & Subramaniam	2021	289.313	19.55	–	–	–	–
Netopil et al.	2022	289.313	19.55	–	–	–	-7.54
Dias et al.	2021	289.311	19.549	0.308	0.004	-2.848	3.198
Cantat-Gaudin et al.	2020	289.313	19.55	0.303	0.007	-2.834	–
Sánchez et al.	2020	289.3	19.55	–	0.025	-2.755	–
Donor et al.	2020	289.308	19.543	–	-0.17	-3.17	23.0
Cantat-Gaudin & Anders	2020	289.313	19.55	0.303	0.007	-2.834	–
Liu & Pang	2019	289.318	19.545	0.306	-0.038	-2.83	–
Soubiran et al.	2018	289.313	19.55	–	–	–	7.63
Bica et al.	2019	289.322	19.537	–	–	–	–
Cantat-Gaudin et al.	2018	289.313	19.55	0.303	0.007	-2.834	–
Dib et al.	2018	289.308	19.543	–	–	–	–
Loktin & Popova	2017	289.32	19.561	–	1.893	-7.555	-9.6
Sampedro et al.	2017	289.3	19.55	–	0.92	-4.23	–
Kharchenko et al.	2016	289.302	19.541	–	–	–	–
Dias et al.	2014	289.3	19.55	–	0.99	-4.92	–
Kharchenko et al.	2013	289.308	19.543	–	1.76	-7.9	–
Bukowiecki et al.	2011	289.308	19.56	–	–	–	–
Dias et al.	2002	289.3	19.55	–	0.99	-4.92	-9.6
Lynga	1987	289.298	19.537	–	–	–	–

💡 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–	2.76	3.3	1.96	1413	0.000	2172	–	0
Otto et al.	2026	–	–	–	1445	0.160⁽¹⁵⁾	–	–	–
Hu & Soubiran	2025	–	–	–	–	0.000⁽⁵⁾	–	–	–
Almeida et al.	2025	2.80	3.30	–	1151	–	2172	–	–
Hunt & Reffert	2024	2.72	3.92	1.96	1009	–	4680⁽¹⁾	–	–
Cavallo et al.	2024	2.90	3.93	–	813	-0.140	–	–	–
Hunt & Reffert	2023	2.72	3.92	1.96	1009	–	–	–	–
Just et al.	2023	–	–	–	1413	–	843	–	–
Spina et al.	2022	–	–	–	–	0.000	–	–	–
Jadhav & Subramaniam	2021	2.86	2.75	–	1445	–	3673	–	0⁽¹⁾
Netopil et al.	2022	2.86⁽¹⁾	–	–	1445	0.000⁽¹⁾	–	–	–
Dias et al.	2021	2.80	3.30	–	1151	0.066	–	–	–
Cantat-Gaudin et al.	2020	2.86	2.75	–	1445	–	–	–	–
Kounkel et al.	2020	2.62	3.22	–	1622	–	–	–	–
Donor et al.	2020	–	–	–	–	0.000	–	–	–
Cantat-Gaudin & Anders	2020	3.02	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	1200	0.500	–	–	–
Soubiran et al.	2018	3.02	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	3.02	–	–	–	–	–	–	–
Dib et al.	2018	1.98	–	–	1413	–	–	–	–
Loktin & Popova	2017	2.05	1.89	–	6310	–	–	–	–
Kharchenko et al.	2016	1.98	3.61	–	1413	–	–	–	–
Kharchenko et al.	2013	1.98	3.61	–	1413	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	279	–	–
Bukowiecki et al.	2011	2.65⁽¹⁾	2.71	–	1259	–	–	–	–
Dias et al.	2002	1.80	4.42	–	1288	–	–	–	–

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

Visualization

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