FSR 1017

(MWSC 567)

0.14 UTI

0.25

C_N

0.22

C_dens

0.12

C_C3

0.06

C_lit

1.0

C_dup

N_m (P>50%) 25

Core radius and density 1.7 [pc], 1.1 [pc^-2]

C3 classification DC

C_N 0.25 Poorly populated
C_dens 0.22 Very loose
C_C3 0.12 Very low quality
C_lit 0.06 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 1017 is a poorly populated, very loose object of very low C3 quality. Its parallax locates it at a very close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster (see Parameters). It is rarely studied in the literature.

⚠️ 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.

Very close Low extinction Near-solar metallicity Young

Palma et al. (2025)
Part of multiple system G87, along with Melotte_25 and HSC_1152.

Cavallo et al. (2024)
Bronze sample.

Hunt & Reffert (2024)
Classified as moving group. CMD class: 0.97 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.97 (50th percentile).

Data

🔍 Search references for FSR 1017 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–	81.152	-3.06	28.969	16.915	-51.792	21.628
Cavallo et al.	2024	79.875	-1.981	30.919	–	–	–
Hunt & Reffert	2023	82.969	-3.035	30.919	17.945	-61.139	32.183
Bica et al.	2019	83.036	-3.039	–	–	–	–
Froebrich et al.	2007	83.037	-3.038	–	–	–	–

💡 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–	0.04	0.53	0.51	39	-0.220	–	–	–
Cavallo et al.	2024	0.04	0.68	–	62	-0.220	–	–	–
Hunt & Reffert	2023	0.04	0.38	0.51	16	–	–	–	–

Visualization

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