FSR 1399

(MWSC 1546)

0.62 UTI

0.58

C_N

0.8

C_dens

0.75

C_C3

0.48

C_lit

1.0

C_dup

N_m (P>50%) 67

Core radius and density 1.2 [pc], 4.0 [pc^-2]

C3 classification AB

C_N 0.58 Moderately populated
C_dens 0.8 Dense
C_C3 0.75 High quality
C_lit 0.48 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 1399 is a moderately populated, 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 near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age and metallicity parameters (see Parameters). It is poorly studied in the literature.

Relatively close High extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.55 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.55 (50th percentile).

Hu et al. (2021)
Ellipticities (core, all): e_core=0.2806, e_all=0.0707.

Data

🔍 Search references for FSR 1399 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–	131.034	-39.352	0.333	-4.06	3.446	94.26
Hu & Soubiran	2025	131.042	-39.351	–	–	–	–
Almeida et al.	2025	131.037	-39.351	–	–	–	–
Hunt & Reffert	2024	131.04	-39.355	0.324	-4.032	3.446	89.413
Cavallo et al.	2024	131.042	-39.351	0.329	–	–	–
Hunt & Reffert	2023	131.04	-39.355	0.324	-4.032	3.446	89.413
Almeida et al.	2023	131.039	-39.349	–	–	–	–
Just et al.	2023	131.035	-39.362	–	–	–	–
Jadhav & Subramaniam	2021	131.035	-39.352	–	–	–	–
Dias et al.	2021	131.037	-39.351	0.314	-4.123	3.372	–
Cantat-Gaudin et al.	2020	131.035	-39.352	0.315	-4.111	3.387	–
Cantat-Gaudin & Anders	2020	131.035	-39.352	0.315	-4.111	3.387	–
Bica et al.	2019	131.062	-39.366	–	–	–	–
Cantat-Gaudin et al.	2018	131.035	-39.352	0.315	-4.111	3.387	–
Kharchenko et al.	2016	131.035	-39.362	–	–	–	–
Kharchenko et al.	2013	131.04	-39.365	–	-4.38	8.07	–
Froebrich et al.	2007	131.058	-39.37	–	–	–	–

💡 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–	2.78	3.03	2.25	608	0.010	606	0.62	0
Hu & Soubiran	2025	–	–	–	–	0.000⁽⁵⁾	–	–	–
Almeida et al.	2025	2.78	3.03	–	625	–	366	–	–
Hunt & Reffert	2024	2.66	2.69	2.25	233	–	621⁽¹⁾	–	–
Cavallo et al.	2024	2.77	3.12	–	631	0.500	–	–	–
Hunt & Reffert	2023	2.66	2.69	2.25	233	–	–	–	–
Almeida et al.	2023	2.56	3.12	–	590	-0.017	351⁽¹⁾	0.62	–
Just et al.	2023	–	–	–	200	–	843	–	–
Jadhav & Subramaniam	2021	2.92	2.70	–	977	–	606	–	0⁽¹⁾
Dias et al.	2021	2.78	3.03	–	625	0.020	–	–	–
Cantat-Gaudin et al.	2020	2.92	2.70	–	977	–	–	–	–
Kounkel et al.	2020	2.73	3.09	–	676	–	–	–	–
Cantat-Gaudin & Anders	2020	2.90	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.90	–	–	–	–	–	–	–
Kharchenko et al.	2016	3.31	3.94	–	200	–	–	–	–
Kharchenko et al.	2013	3.31	3.94	–	200	–	–	–	–

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

Visualization

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