NGC 4337

(Collinder 254; VDBH 129; MWSC 2023; OCL 878; vdBergh-Hagen 129; ESO 131 02; FSR 1611; FoF 595)

0.98 UTI

0.88

C_N

1.0

C_dens

1.0

C_C3

1.0

C_lit

1.0

C_dup

N_m (P>50%) 436

Core radius and density 1.1 [pc], 20 [pc^-2]

C3 classification AA

C_N 0.88 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high 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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NGC 4337 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 moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is very well-studied in the literature.

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

Relatively close Moderate extinction Massive Near-solar metallicity Old Contains BSS

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.99 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.22, e_all=0.0967.

Data

🔍 Search references for NGC 4337 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–	186.026	-58.125	0.382	-8.858	1.505	-17.618
Otto et al.	2026	186.022	-58.122	–	-8.84	1.47	-17.7
Li et al.	2025	186.022	-58.125	0.357	-8.841	1.468	–
Guerco et al.	2025	186.0	-58.1	0.38	-8.82	1.55	-17.7
Hu & Soubiran	2025	186.022	-58.129	–	–	–	–
Almeida et al.	2025	186.018	-58.127	–	–	–	–
Hunt & Reffert	2024	186.022	-58.122	0.382	-8.854	1.504	-18.367
Cavallo et al.	2024	186.022	-58.129	0.381	–	–	–
Hunt & Reffert	2023	186.022	-58.122	0.382	-8.854	1.504	-18.367
Almeida et al.	2023	186.017	-58.126	–	–	–	–
Just et al.	2023	185.99	-58.114	–	–	–	–
Jadhav & Subramaniam	2021	186.022	-58.125	–	–	–	–
Netopil et al.	2022	186.017	-58.123	–	–	–	-17.26
Richer et al.	2021	186.015	-58.126	0.361	-8.836	1.484	–
Dias et al.	2021	186.018	-58.127	0.358	-8.842	1.474	-16.464
Spina et al.	2021	186.022	-58.126	0.354	-8.84	1.469	–
Cantat-Gaudin et al.	2020	186.022	-58.125	0.357	-8.841	1.468	–
Donor et al.	2020	186.0	-58.117	–	-8.88	1.48	-18.2
Cantat-Gaudin & Anders	2020	186.022	-58.125	0.357	-8.841	1.468	–
Liu & Pang	2019	186.015	-58.132	0.362	-8.834	1.477	–
Soubiran et al.	2018	186.022	-58.125	–	–	–	-15.58
Bica et al.	2019	186.01	-58.129	–	–	–	–
Cantat-Gaudin et al.	2018	186.022	-58.125	0.357	-8.841	1.468	–
Angelo et al.	2019	186.021	-58.122	–	–	–	–
Dias et al.	2018	–	–	–	-8.88	0.03	–
Loktin & Popova	2017	186.015	-58.123	–	-4.82	-2.041	-17.75
Sampedro et al.	2017	186.017	-58.123	–	-5.76	2.26	–
Kharchenko et al.	2016	185.99	-58.114	–	–	–	–
Netopil et al.	2016	186.0	-58.117	–	–	–	–
Dias et al.	2014	186.017	-58.123	–	-5.61	2.37	–
Kharchenko et al.	2013	186.0	-58.117	–	-7.56	-1.91	–
Bukowiecki et al.	2011	186.021	-58.13	–	–	–	–
van den Bergh	2006	186.021	-58.122	–	–	–	–
Dias et al.	2002	186.017	-58.123	–	-5.52	2.37	-17.75
Lynga	1987	185.993	-58.118	–	–	–	–
van den Bergh & Hagen	1975	185.3	-57.85	–	–	–	–
Sulentic et al.	1973	185.993	-58.105	–	–	–	–

💡 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–	2.47	1.06	0.42	1445	0.205	1440	0.63	3
Otto et al.	2026	–	–	–	1445	0.210⁽¹⁵⁾	–	–	–
Li et al.	2025	2.49	1.01	–	1644	0.244	–	–	–
Guerco et al.	2025	–	–	–	1450	0.250	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.210⁽⁵⁾	–	–	–
Almeida et al.	2025	2.42	1.29	–	1439	–	962	–	–
Hunt & Reffert	2024	2.47	1.10	0.42	1412	–	2874⁽¹⁾	–	–
Cavallo et al.	2024	2.26	1.06	–	1549	0.200	–	–	–
Hunt & Reffert	2023	2.47	1.10	0.42	1413	–	–	–	–
Almeida et al.	2023	2.37	1.29	–	1486	0.047	1049⁽¹⁾	0.63	–
Just et al.	2023	–	–	–	1413	–	1986	–	–
Spina et al.	2022	–	–	–	–	0.240	–	–	–
Jadhav & Subramaniam	2021	2.45	1.06	–	1445	–	1957	–	3⁽¹⁾
Netopil et al.	2022	2.45⁽¹⁾	–	–	1445	0.240⁽¹⁾	–	–	–
Richer et al.	2021	–	1.02	–	–	–	–	–	–
Dias et al.	2021	2.42	1.29	–	1439	0.105	–	–	–
Spina et al.	2021	2.82	–	–	1445	0.230⁽²⁰⁾	–	–	–
Cantat-Gaudin et al.	2020	2.45	1.06	–	1445	–	–	–	–
Kounkel et al.	2020	2.40	1.40	–	1318	–	–	–	–
Donor et al.	2020	–	–	–	–	0.240	–	–	–
Cantat-Gaudin & Anders	2020	2.59	–	–	–	–	–	–	–
Liu & Pang	2019	–	–	–	2400	-0.250	–	–	–
Soubiran et al.	2018	2.59	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.59	–	–	–	–	–	–	–
Angelo et al.	2019	2.75	–	–	1580	–	186	–	–
Loktin & Popova	2017	0.61	0.53	–	372	–	–	–	–
Kharchenko et al.	2016	2.87	1.05	–	1413	–	–	–	–
Netopil et al.	2016	7.11	–	–	1750	0.120⁽²⁾	–	–	–
Kharchenko et al.	2013	2.87	1.05	–	1413	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	1440	–	–
Bukowiecki et al.	2011	2.01⁽¹⁾	0.60	–	2239	–	–	–	–
van den Bergh	2006	0.49	0.47	–	282	–	–	–	–
Dias et al.	2002	2.60	0.73	–	1585	0.120	–	–	–

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

Visualization

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