Kronberger 39

(MWSC 1868; DSH J1054.2-6144)

0.13 UTI

0.0

C_N

0.01

C_dens

0.12

C_C3

0.26

C_lit

1.0

C_dup

N_m (P>50%) 22

Core radius and density 9.5 [pc], 0.03 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.12 Very low quality
C_lit 0.26 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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Kronberger 39 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a large distance, below the mid-plane, affected by moderate extinction. It is catalogued as a very massive, near-solar metallicity, very young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is poorly studied in the literature.

⚠️ Warning: the low UTI value and no obvious signs of duplication (C_dup=1.0) indicate that this is quite probably an asterism, moving group, or artifact, and not a real open cluster.

Very distant Moderate extinction Very massive Near-solar metallicity Very young

Perren et al. (2022)
Located in a region of high field star contamination. Kronberger 2006 used a 0.8' radius and reported ~11.1 kpc with no age estimate, classifying it as a cluster candidate with RC. Monteiro 2020 later discarded it due to a poor isochrone fit. The least populated cluster in the sample (55 members). ASteCA identifies the TO at G~20 and the RC at G~17.5, giving 13 kpc and 2.8 Gyr — in reasonable agreement with Kronberger 2006. MWSC values of 1 Myr and 4.4 kpc are entirely inconsistent with the CMD features.

Bica et al. (2019)
The Preliminary Amateur Open Cluster Catalog, Version 08/03/2003.

Data

🔍 Search references for Kronberger 39 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–	163.575	-61.747	0.116	-4.731	1.922	46.722
Just et al.	2023	163.552	-61.729	–	–	–	–
Perren et al.	2022	163.557	-61.738	–	–	–	–
Monteiro & Dias	2019	163.557	-61.738	–	-5.955	2.167	2.594
Bica et al.	2019	163.545	-61.74	–	–	–	–
Sampedro et al.	2017	163.558	-61.738	–	-3.69	-0.82	–
Kharchenko et al.	2016	163.552	-61.729	–	–	–	–
Dias et al.	2014	163.558	-61.738	–	-4.44	-0.77	–
Kharchenko et al.	2013	163.558	-61.733	–	-3.91	6.07	–
Kronberger et al.	2006	163.557	-61.738	–	–	–	–
Dias et al.	2002	163.558	-61.738	–	-3.91	6.07	–

💡 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–	7.735	2.84	–	1	-0.053	6514	0.75	–
Just et al.	2023	–	–	–	1	–	28	–	–
Perren et al.	2022	13.00	2.46	–	2818	-0.110	13000	0.75	–
Monteiro & Dias	2019	3.47	1.14	–	17	0.004	–	–	–
Kharchenko et al.	2016	4.37	3.15	–	1	–	–	–	–
Kharchenko et al.	2013	4.37	3.15	–	1	–	–	–	–
Kronberger et al.	2006	11.10	2.84	–	–	–	–	–	–
Dias et al.	2002	11.10	2.84	–	–	–	–	–	–

Visualization

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