FSR 0923

(MWSC 777; MWSC 778)

0.75 UTI

0.69

C_N

1.0

C_dens

0.5

C_C3

0.78

C_lit

1.0

C_dup

N_m (P>50%) 88

Core radius and density 1.2 [pc], 6.6 [pc^-2]

C3 classification BB

C_N 0.69 Moderately populated
C_dens 1.0 Very dense
C_C3 0.5 Intermediate quality
C_lit 0.78 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0923 is a moderately populated, very dense object of intermediate C3 quality. Its parallax locates it at a relatively close distance, near 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

Palma et al. (2025)
Classified as optical pair P117, along with FSR_0931.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.77 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.3709, e_all=0.2709.

Data

🔍 Search references for FSR 0923 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–	92.648	16.975	0.585	0.535	0.164	42.967
Zhang et al.	2024	92.647	16.974	–	–	–	–
Hunt & Reffert	2024	92.647	16.974	0.568	0.512	0.151	36.564
Cavallo et al.	2024	92.646	16.95	0.57	–	–	–
Hunt & Reffert	2023	92.647	16.974	0.568	0.512	0.151	36.564
Just et al.	2023	92.632	16.971	–	–	–	–
Jadhav & Subramaniam	2021	92.644	16.971	–	–	–	–
Cantat-Gaudin et al.	2020	92.644	16.971	0.587	0.657	0.141	–
Zhong et al.	2020	92.644	16.971	–	0.657	0.141	32.399
Cantat-Gaudin & Anders	2020	92.644	16.971	0.587	0.657	0.141	–
Soubiran et al.	2018	92.644	16.971	–	–	–	43.83
Bica et al.	2019	92.649	16.97	–	–	–	–
Cantat-Gaudin et al.	2018	92.644	16.971	0.587	0.657	0.141	–
Dias et al.	2018	–	–	–	0.18	-0.65	–
Dib et al.	2018	92.64	16.97	–	–	–	–
Loktin & Popova	2017	92.64	16.981	–	0.228	-1.762	–
Sampedro et al.	2017	92.65	16.971	–	–	–	–
Joshi et al.	2016	92.64	16.97	–	–	–	–
Kharchenko et al.	2016	92.632	16.971	–	–	–	–
Dias et al.	2014	92.65	16.971	–	-0.51	1.4	–
Kharchenko et al.	2013	92.64	16.97	–	0.83	-6.51	–
Froebrich et al.	2007	92.65	16.971	–	–	–	–
Dias et al.	2002	92.65	16.971	–	-0.51	1.4	–

💡 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–	1.62	3.395	2.74	531	-0.058	386	–	0
Zhang et al.	2024	–	–	–	–	-0.181⁽¹⁾	–	–	–
Hunt & Reffert	2024	1.62	3.39	2.74	105	–	591⁽¹⁾	–	–
Cavallo et al.	2024	1.79	3.09	–	372	0.430	–	–	–
Hunt & Reffert	2023	1.62	3.39	2.74	105	–	–	–	–
Just et al.	2023	–	–	–	531	–	95	–	–
Jadhav & Subramaniam	2021	1.67	1.84	–	977	–	386	–	0⁽¹⁾
Cantat-Gaudin et al.	2020	1.67	1.84	–	977	–	–	–	–
Kounkel et al.	2020	1.67	3.17	–	776	–	–	–	–
Zhong et al.	2020	1.62⁽¹⁾	3.94	–	8725	-0.058	–	–	–
Cantat-Gaudin & Anders	2020	1.62	–	–	–	–	–	–	–
Soubiran et al.	2018	1.62	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	1.62	–	–	–	–	–	–	–
Dib et al.	2018	1.44	–	–	531	–	–	–	–
Loktin & Popova	2017	2.02	3.40	–	398	–	–	–	–
Joshi et al.	2016	1.44	3.94	–	531	–	–	–	–
Kharchenko et al.	2016	1.44	3.94	–	531	–	–	–	–
Kharchenko et al.	2013	1.44	3.94	–	531	–	–	–	–
Dias et al.	2002	1.50	4.26	–	501	–	–	–	–

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

Visualization

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