Kronberger 2

(MWSC 2898; DSH J1821.3-1417)

0.34 UTI

0.0

C_N

0.22

C_dens

0.75

C_C3

0.35

C_lit

1.0

C_dup

N_m (P>50%) 23

Core radius and density 1.7 [pc], 1.1 [pc^-2]

C3 classification BA

C_N 0.0 Sparse
C_dens 0.22 Very loose
C_C3 0.75 High quality
C_lit 0.35 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 2 is a sparse, very loose object of high C3 quality. Its parallax locates it at a relatively close^* distance, near the mid-plane, affected by high extinction. It is catalogued as an intermediate-age cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~1.65 kpc) differs significantly from the median photometric distance (~3.06 kpc).

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Distant High extinction Intermediate age

Palma et al. (2025)
Part of multiple system G129, along with OC_0024, UBC_96, HSC_175 and ASCC_94.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.92 (50th percentile).

Bica et al. (2019)
Web updates in DAML02, some were later removed (2003 to 2010).

Morales et al. (2013)
Classified as morphological type 'OC2' (totally exposed cluster without correlation with ATLASGAL emission). Morphological flag: exposed cluster, without submm emission.

Data

🔍 Search references for Kronberger 2 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–	275.415	-14.276	0.605	0.027	-1.921	25.9
Hunt & Reffert	2024	275.426	-14.287	0.611	0.047	-1.909	–
Hunt & Reffert	2023	275.426	-14.287	0.611	0.047	-1.909	–
Just et al.	2023	275.322	-14.285	–	–	–	–
Bica et al.	2019	275.329	-14.285	–	–	–	–
Sampedro et al.	2017	275.329	-14.29	–	2.09	-2.28	–
Kharchenko et al.	2016	275.322	-14.285	–	–	–	–
Tadross	2014	275.329	-14.287	–	–	–	–
Dias et al.	2014	275.329	-14.29	–	2.75	-1.29	–
Kharchenko et al.	2013	275.329	-14.283	–	1.09	0.26	–
Morales et al.	2013	275.329	-14.29	–	–	–	–
Bukowiecki et al.	2011	275.325	-14.291	–	–	–	–
Kronberger et al.	2006	275.329	-14.29	–	–	–	–
Dias et al.	2002	275.329	-14.29	–	1.09	0.26	–

💡 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–	3.06	3.47	1.39	100	–	628	–	–
Hunt & Reffert	2024	1.59	2.18	1.39	45	–	112⁽¹⁾	–	–
Hunt & Reffert	2023	1.59	2.18	1.39	45	–	–	–	–
Just et al.	2023	–	–	–	158	–	1143	–	–
Kharchenko et al.	2016	3.20	5.65	–	158	–	–	–	–
Tadross	2014	3.06	3.47	–	100	–	–	–	–
Kharchenko et al.	2013	3.20	5.65	–	158	–	–	–	–
Morales et al.	2013	3.07	–	–	100	–	–	–	–
Dias et al.	2002	3.06	3.47	–	100	–	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CWNU 1877	92.0	275.42	-14.28	0.6	0.02	-1.91	–	0.02

💡 Note: The % column shows the percentage of members that Kronberger 2 shares with each listed object.

Visualization

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