UBC 309

0.05 UTI

0.88

C_N

1.0

C_dens

0.75

C_C3

0.0

C_lit

0.1

C_dup

N_m (P>50%) 437

Core radius and density 2.8 [pc], 6.5 [pc^-2]

C3 classification AB

C_N 0.88 Rich
C_dens 1.0 Very dense
C_C3 0.75 High quality
C_lit 0.0 Rarely studied
C_dup 0.1 Likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 309 is a rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 6 years.

⚠️ Warning: This is likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. See table with shared members information.

Relatively close Moderate extinction Young

Castro-Ginard et al. (2020)
Coincidence with Sim et al. (2019, J. Korean Astron. Soc., 52, 145) or Liu & Pang (2019ApJS..245...32L), see Sect. 4.1.5.

Data

🔍 Search references for UBC 309 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–	238.115	-55.414	0.485	-1.064	-2.244	-21.971
Castro-Ginard et al.	2020	238.1	-55.408	0.462	-1.036	-2.239	–

💡 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–	2.04	2.94	–	72	–	–	–	–
Kounkel et al.	2020	2.04	2.94	–	72	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
UFMG 3	90.4	238.12	-55.42	0.49	-1.06	-2.24	-22.35	0.56
FoF 1182	52.6	238.1	-55.42	0.49	-1.06	-2.24	-22.35	0.0
OC 0636	20.6	238.09	-55.42	0.5	-1.09	-2.22	-21.97	0.0

💡 Note: The % column shows the percentage of members that UBC 309 shares with each listed object.

Visualization

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