FoF 861

(LP 861)

0.73 UTI

0.77

C_N

1.0

C_dens

1.0

C_C3

0.44

C_lit

1.0

C_dup

N₅₀ (P>50% members) 147

Radius (P>50% members) 1.6 [arcmin]

C3 classification AA

C_N 0.77 Rich
C_dens 1.0 Very dense
C_C3 1.0 Very high 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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FoF 861 is a rich, very dense object of very high C3 quality. Its parallax locates it at a moderate distance, below the mid-plane, affected by moderate extinction. It is catalogued as a massive, near-solar metallicity, old cluster, but with a large variance across recent sources for the metallicity parameter (see Parameters). It is poorly studied in the literature.

Note: This object shares a moderate percentage of members with 4 later reported entries. See table with shared members information.

Distant Moderate extinction Massive Near-solar metallicity Old

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for FoF 861 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–	244.707	-52.881	0.252	-2.586	-3.976	-24.64
Li et al.	2025	244.705	-52.88	0.243	-2.563	-3.953	–
Hu & Soubiran	2025	244.676	-52.895	–	–	–	–
Hunt & Reffert	2024	244.706	-52.884	0.266	-2.629	-4.0	-23.647
Cavallo et al.	2024	244.676	-52.895	0.265	–	–	–
Hunt & Reffert	2023	244.706	-52.884	0.266	-2.629	-4.0	-23.647
Cantat-Gaudin et al.	2020	244.705	-52.88	0.243	-2.563	-3.953	–
Liu & Pang	2019	244.708	-52.88	0.267	-2.662	-3.93	–

💡 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–	3.37	2.215	2.07	1318	-0.158	1517	–	–
Li et al.	2025	3.23	2.38	–	1187	-0.165	–	–	–
Hu & Soubiran	2025	–	–	–	–	-0.150⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	1517⁽¹⁾	–	–
Cavallo et al.	2024	2.43	2.90	–	1318	-1.070	–	–	–
Hunt & Reffert	2023	3.51	2.05	2.07	783	–	–	–	–
Cantat-Gaudin et al.	2020	4.09	1.36	–	1862	–	–	–	–
Liu & Pang	2019	–	–	–	1510	0.000	–	–	–

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

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv
CWWDL 928	47.6	244.7	-52.88	0.26	-2.6	-3.97	-23.78
CWWDL 929	45.6	244.7	-52.88	0.24	-2.61	-3.97	-24.64
OC 0647	21.8	244.71	-52.89	0.23	-2.6	-3.97	-24.64
OC 0648	17.0	244.71	-52.88	0.26	-2.55	-3.91	-23.78

💡 Note: The % column shows the percentage of members that FoF 861 shares with each listed object.

Visualization

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