FSR 1258

(MWSC 1187)

0.13 UTI

0.0

C_N

0.03

C_dens

0.12

C_C3

0.25

C_lit

1.0

C_dup

C3 classification DC

Number of members (P>50%) 13

Radius (P>50% members) 6.2 [arcmin]

C_N 0.0 Sparse
C_dens 0.03 Very loose
C_C3 0.12 Very low quality
C_lit 0.25 Poorly studied
C_dup 1.0 Unique

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

Overview

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FSR 1258 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a moderate^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as an old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~4.83 kpc) differs significantly from the median photometric distance (~2.93 kpc).

⚠️ 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.

Relatively close Moderate extinction Old

Data

🔍 Search references for FSR 1258 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	–	110.302	-20.236	0.207	-1.196	1.475	99.737
Just et al.	2023	110.312	-20.218	–	–	–	–
Kharchenko et al.	2016	110.312	-20.218	–	–	–	–
Kharchenko et al.	2013	110.317	-20.22	–	-4.58	3.33	–
Froebrich et al.	2007	110.292	-20.216	–	–	–	–

💡 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
Just et al.	2023	–	–	–	1259	–	638	–	–
Kharchenko et al.	2016	2.93	1.62	–	1259	–	–	–	–
Kharchenko et al.	2013	2.93	1.62	–	1259	–	–	–	–

Visualization

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