FSR 1535

(MWSC 1771)

0.23 UTI

0.0

C_N

0.01

C_dens

0.25

C_C3

0.44

C_lit

1.0

C_dup

C3 classification CC

Number of members (P>50%) 16

Radius (P>50% members) 7.9 [arcmin]

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.25 Low quality
C_lit 0.44 Poorly studied
C_dup 1.0 Unique

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

Overview

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FSR 1535 is a sparse, very loose object of low C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by moderate extinction. It is catalogued as a low-mass, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

(*): The parallax distance estimate (~6.47 kpc) differs significantly from the median photometric distance (~1.60 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 Low mass Intermediate age

Data

🔍 Search references for FSR 1535 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	–	151.857	-59.209	0.154	-5.785	3.477	44.517
Just et al.	2023	151.998	-59.191	–	–	–	–
Sánchez et al.	2020	151.979	-59.197	–	-5.301	3.52	–
Kharchenko et al.	2016	151.998	-59.191	–	–	–	–
Dias et al.	2014	151.979	-59.197	–	-1.36	2.18	–
Kharchenko et al.	2013	152.002	-59.195	–	-7.45	6.66	-10.3
Froebrich et al.	2007	151.979	-59.197	–	–	–	–
Dias et al.	2002	151.979	-59.197	–	-7.45	6.66	–

💡 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	–	–	–	733	–	25	–	–
Kharchenko et al.	2016	1.60	1.23	–	733	–	–	–	–
Kharchenko et al.	2013	1.60	1.23	–	733	–	–	–	–
Dias et al.	2002	1.60	1.23	–	733	–	–	–	–

Visualization

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