FoF 2117

(LP 2117)

0.67 UTI

0.78

C_N

0.69

C_dens

1.0

C_C3

0.44

C_lit

1.0

C_dup

N_m (P>50%) 178

Core radius and density 1.5 [pc], 3.5 [pc^-2]

C3 classification AA

C_N 0.78 Rich
C_dens 0.69 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.44 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FoF 2117 is a rich, moderately dense object of very high C3 quality. Its parallax locates it at a relatively close distance, near the mid-plane, affected by high extinction. It is catalogued as a very massive, near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the age parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with at least one entry reported in the same catalogue. See table with shared members information.

Relatively close High extinction Very massive Near-solar metallicity Intermediate age

Li et al. (2026)
Tidal & Core radii: r_t=23+/-3.2 [pc], r_c=0.83+/-0.01 [pc]; stars within r_t: N~584

Palma et al. (2025)
Classified as optical pair P251, along with UBC_108.

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 0.29 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 0.29 (50th percentile).

Data

🔍 Search references for FoF 2117 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–	282.306	-4.475	0.613	1.1	0.069	-9.915
Li et al.	2026	282.31	-4.48	–	–	–	–
Yang et al.	2025	282.343	-4.487	–	–	–	–
Hunt & Reffert	2024	282.343	-4.487	0.609	1.109	0.064	0.987
Cavallo et al.	2024	282.313	-4.469	0.61	–	–	–
Hunt & Reffert	2023	282.343	-4.487	0.609	1.109	0.064	0.987
Tarricq et al.	2022	282.332	-4.515	0.608	1.101	0.043	–
Jadhav & Subramaniam	2021	282.302	-4.466	–	–	–	–
Cantat-Gaudin et al.	2020	282.302	-4.466	0.607	1.089	0.094	–
Liu & Pang	2019	282.347	-4.454	0.608	1.079	0.068	–

💡 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–	1.51	3.13	2.58	430	-0.080	5554	–	0
Yang et al.	2025	–	–	–	200	-0.060⁽³⁾	–	–	–
Hunt & Reffert	2024	1.54	3.13	2.58	199	–	7155⁽¹⁾	–	–
Cavallo et al.	2024	1.49	3.42	–	229	-0.080	–	–	–
Hunt & Reffert	2023	1.54	3.13	2.58	199	–	–	–	–
Tarricq et al.	2022	1.46	–	–	676	–	–	–	–
Jadhav & Subramaniam	2021	1.51	2.08	–	631	–	3954	–	0⁽¹⁾
Cantat-Gaudin et al.	2020	1.51	2.08	–	631	–	–	–	–
Liu & Pang	2019	–	–	–	1410	-0.500	–	–	–

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UBC 111	100.0	282.31	-4.47	0.61	1.1	0.07	-9.04	0.45
FoF 2118	87.6	282.32	-4.48	0.63	1.1	0.08	-9.58	0.51
UBC 574	43.8	282.34	-4.41	0.61	1.09	0.1	-8.83	0.0
UBC 354	7.3	282.39	-4.36	0.6	1.22	0.09	-10.05	0.0

💡 Note: The % column shows the percentage of members that FoF 2117 shares with each listed object.

Visualization

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