FoF 2309

0.60 UTI

0.56

C_N

1.0

C_dens

0.75

C_C3

0.35

C_lit

1.0

C_dup

N₅₀ (P>50% members) 62

Stellar density (N₅₀/rad) 17.8 [N/pc²]

C3 classification AB

C_N 0.56 Moderately populated
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.35 Poorly studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

ℹ️

FoF 2309 is a moderately populated, very dense object of high C3 quality. Its parallax locates it at a close distance, near the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, intermediate-age cluster (see Parameters). It is poorly studied in the literature.

Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.

Close Low extinction Near-solar metallicity Intermediate age

Cavallo et al. (2024)
Gold sample.

Data

🔍 Search references for FoF 2309 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	99999–	209.929	-63.605	1.03	-6.157	-1.715	9.608
Hu & Soubiran	2025	209.914	-63.611	–	–	–	–
Hunt & Reffert	2024	209.963	-63.611	1.024	-6.189	-1.722	9.394
Cavallo et al.	2024	209.914	-63.611	1.028	–	–	–
Hunt & Reffert	2023	209.963	-63.611	1.024	-6.189	-1.722	9.394
He et al.	2022	209.924	-63.623	1.033	-6.169	-1.683	–
Liu & Pang	2019	209.942	-63.613	1.0	-6.165	-1.758	–

💡 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–	0.955	0.81	0.28	669	-0.060	215	–	–
Hu & Soubiran	2025	–	–	–	–	-0.060⁽⁵⁾	–	–	–
Hunt & Reffert	2024	–	–	–	–	–	215⁽¹⁾	–	–
Cavallo et al.	2024	0.99	0.71	–	891	0.120	–	–	–
Hunt & Reffert	2023	0.92	0.81	0.28	352	–	–	–	–
He et al.	2022	–	1.25	–	447	–	–	–	–
Liu & Pang	2019	–	–	–	1150	-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 530	96.8	209.92	-63.61	1.03	-6.16	-1.71	10.15	0.02

💡 Note: The % column shows the percentage of members that FoF 2309 shares with each listed object.

Visualization

ℹ️

1 2