FSR 1597

(MWSC 1971)

0.18 UTI

0.0

C_N

0.01

C_dens

0.38

C_C3

0.25

C_lit

1.0

C_dup

C3 classification BC

Number of members (P>50%) 11

Radius (P>50% members) 6.6 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.38 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 1597 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, well below the mid-plane, affected by low extinction. It is catalogued as a massive, old cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~7.58 kpc) differs significantly from the median photometric distance (~2.88 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 Low extinction Massive Old

Data

🔍 Search references for FSR 1597 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	–	176.141	-67.101	0.132	-7.495	1.614	52.692
Just et al.	2023	176.137	-67.081	–	–	–	–
Kharchenko et al.	2016	176.137	-67.081	–	–	–	–
Kharchenko et al.	2013	176.145	-67.085	–	-10.14	2.89	–
Froebrich et al.	2007	176.179	-67.083	–	–	–	–

💡 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	–	–	–	1995	–	1153	–	–
Kharchenko et al.	2016	2.88	1.00	–	1995	–	–	–	–
Kharchenko et al.	2013	2.88	1.00	–	1995	–	–	–	–

Visualization

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