FSR 1284

(MWSC 1176)

0.85 UTI

0.59

C_N

1.0

C_dens

1.0

C_C3

0.82

C_lit

1.0

C_dup

C3 classification AA

Number of members (P>50%) 68

Radius (P>50% members) 3.0 [arcmin]

C_N 0.59 Moderately populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.82 Well-studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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FSR 1284 is a moderately populated, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is well-studied in the literature.

Relatively close Moderate extinction Near-solar metallicity Intermediate age

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

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for FSR 1284 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	–	109.992	-24.535	0.392	-0.958	1.381	59.665
Li et al.	2025	109.992	-24.535	0.392	-0.983	1.357	–
Almeida et al.	2025	109.986	-24.525	–	–	–	–
Hunt & Reffert	2024	109.992	-24.538	0.391	-0.95	1.386	59.669
Cavallo et al.	2024	109.989	-24.521	0.393	–	–	–
Hunt & Reffert	2023	109.992	-24.538	0.391	-0.95	1.386	59.669
Almeida et al.	2023	109.986	-24.524	–	–	–	–
Just et al.	2023	109.989	-24.528	–	–	–	–
Dias et al.	2021	109.986	-24.525	0.391	-0.995	1.358	–
Cantat-Gaudin et al.	2020	109.992	-24.535	0.392	-0.983	1.357	–
Cantat-Gaudin & Anders	2020	109.992	-24.535	0.392	-0.983	1.357	–
Soubiran et al.	2018	109.992	-24.535	–	–	–	42.2
Cantat-Gaudin et al.	2018	109.992	-24.535	0.392	-0.983	1.357	–
Kharchenko et al.	2016	109.989	-24.528	–	–	–	–
Kharchenko et al.	2013	109.995	-24.53	–	-2.01	6.06	–
Froebrich et al.	2007	110.004	-24.526	–	–	–	–

💡 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]	Bfr	BSS
Li et al.	2025	2.28	1.01	–	762	-0.055	–	–	–
Almeida et al.	2025	2.25	1.08	–	778	–	201	–	–
Hunt & Reffert	2024	–	–	–	–	–	356*	–	–
Cavallo et al.	2024	2.98	1.12	–	490	0.700	–	–	–
Hunt & Reffert	2023	2.41	0.52	1.06	769	–	–	–	–
Almeida et al.	2023	2.32	1.05	–	762	-0.045	195*	0.67	–
Just et al.	2023	–	–	–	1396	–	63	–	–
Dias et al.	2021	2.25	1.08	–	778	-0.076	–	–	–
Cantat-Gaudin et al.	2020	2.33	0.84	–	589	–	–	–	–
Cantat-Gaudin & Anders	2020	2.38	–	–	–	–	–	–	–
Soubiran et al.	2018	2.38	–	–	–	–	–	–	–
Cantat-Gaudin et al.	2018	2.38	–	–	–	–	–	–	–
Kharchenko et al.	2016	1.94	0.64	–	1396	–	–	–	–
Kharchenko et al.	2013	1.94	0.64	–	1396	–	–	–	–

(*): Indicates that this parameter is assigned more than one value in the corresponding reference.

Visualization

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