FSR 0170

(MWSC 3264)

0.08 UTI

0.0

C_N

0.01

C_dens

0.12

C_C3

0.13

C_lit

1.0

C_dup

N_m (P>50%) 18

Core radius and density 4.6 [pc], 0.07 [pc^-2]

C3 classification DC

C_N 0.0 Sparse
C_dens 0.01 Very loose
C_C3 0.12 Very low quality
C_lit 0.13 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FSR 0170 is a sparse, very loose object of very low C3 quality. Its parallax locates it at a large^* distance, below the mid-plane, affected by very high extinction. It is catalogued as a massive, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~7.05 kpc) differs significantly from the median photometric distance (~4.02 kpc).

Note: This object shares a small percentage of members with 2 later reported entries. See table with shared members information.

⚠️ 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.

Distant Very high extinction Massive Intermediate age

Data

🔍 Search references for FSR 0170 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–	301.982	27.541	0.142	-2.662	-5.235	5.029
Just et al.	2023	301.922	27.554	–	–	–	–
Bica et al.	2019	301.943	27.566	–	–	–	–
Kharchenko et al.	2016	301.922	27.554	–	–	–	–
Kharchenko et al.	2013	301.927	27.556	–	1.06	-5.08	–
Froebrich et al.	2007	301.942	27.565	–	–	–	–
Dias et al.	2002	301.942	27.565	–	-1.23	2.94	–

💡 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–	4.02	7.62	–	794	–	1884	–	–
Just et al.	2023	–	–	–	794	–	1884	–	–
Kharchenko et al.	2016	4.02	7.62	–	794	–	–	–	–
Kharchenko et al.	2013	4.02	7.62	–	794	–	–	–	–
Dias et al.	2002	4.02	7.62	–	794	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
IRAS 20050+2720C	12.0	301.65	27.49	0.24	-3.09	-5.62	-4.04	0.2
IRAS 20050+2720B	4.0	301.65	27.56	0.35	-2.81	-5.73	–	0.05

💡 Note: The % column shows the percentage of members that FSR 0170 shares with each listed object.

Visualization

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