FoF 1985

(LP 1985)

0.09 UTI

0.0

C_N

0.05

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

N₅₀ (P>50% members) 16

Stellar density (N₅₀/rad) 0.3 [N/pc²]

C3 classification BC

C_N 0.0 Sparse
C_dens 0.05 Very loose
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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FoF 1985 is a sparse, very loose object of low C3 quality. Its parallax locates it at a moderate distance, above the mid-plane, affected by low extinction. It is catalogued as a massive, near-solar metallicity, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

Note: This object shares a small percentage of members with a later reported entry. 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 Low extinction Massive Near-solar metallicity Intermediate age

Almeida et al. (2025)
Mass determination: good fit. Isochrone match: intermediate fit.

Data

🔍 Search references for FoF 1985 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–	109.655	-3.821	0.217	-0.942	0.536	84.317
Almeida et al.	2025	109.663	-3.808	–	–	–	–
Dias et al.	2021	109.663	-3.808	0.244	-0.968	0.547	–

💡 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–	3.72	0.83	–	402	-0.213	1378	–	–
Almeida et al.	2025	3.72	0.83	–	402	–	1378	–	–
Dias et al.	2021	3.72	0.83	–	402	-0.213	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
CKCWDM 59842	24.0	109.54	-3.72	0.2	-1.09	0.59	89.44	0.02

💡 Note: The % column shows the percentage of members that FoF 1985 shares with each listed object.

Visualization

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