FoF 780

(LP 0780)

0.24 UTI

0.0

C_N

0.84

C_dens

0.38

C_C3

0.0

C_lit

1.0

C_dup

C3 classification CB

Number of members (P>50%) 23

Radius (P>50% members) 2.8 [arcmin]

C_N 0.0 Sparse
C_dens 0.84 Dense
C_C3 0.38 Low quality
C_lit 0.0 Rarely studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (α, δ) 🔍 Simbad (α, δ)

Overview

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FoF 780 is a sparse, dense object of low 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, intermediate-age cluster (see Parameters). It is rarely studied in the literature.

(*): The parallax distance estimate (~2.87 kpc) differs significantly from the median photometric distance (~2.14 kpc).

Note: This object shares a significant 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.

Relatively close Moderate extinction Massive Near-solar metallicity Intermediate age

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

Data

🔍 Search references for FoF 780 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	–	148.298	-57.408	0.349	-5.565	3.647	–
Almeida et al.	2025	148.318	-57.438	–	–	–	–
Dias et al.	2021	148.318	-57.438	0.323	-5.6	3.538	8.315

💡 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]	Bfr	BSS
Almeida et al.	2025	2.14	1.80	–	103	–	1022	–	–
Dias et al.	2021	2.14	1.80	–	103	0.011	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OC 0530	60.0	148.29	-57.4	0.34	-5.56	3.68	–	0.22

💡 Note: The % column shows the percentage of members that FoF 780 shares with each listed object.

Visualization

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