UBC 621

0.05 UTI

0.78

C_N

1.0

C_dens

0.62

C_C3

0.0

C_lit

0.09

C_dup

N_m (P>50%) 191

Core radius and density 1.1 [pc], 18 [pc^-2]

C3 classification AC

C_N 0.78 Rich
C_dens 1.0 Very dense
C_C3 0.62 Intermediate quality
C_lit 0.0 Rarely studied
C_dup 0.09 Very likely duplicate

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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UBC 621 is a rich, very dense object of intermediate C3 quality. Its parallax locates it at a very close distance, below the mid-plane, affected by moderate extinction. It is catalogued as a very young cluster (see Parameters). It is rarely studied in the literature, with no articles listed in the last 6 years.

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

Very close Moderate extinction Very young

Data

🔍 Search references for UBC 621 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–	83.83	-4.858	2.534	1.247	-0.724	22.953
Castro-Ginard et al.	2020	83.78	-4.802	2.529	1.236	-0.768	–

💡 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–	0.38	1.75	–	6	–	–	–	–
Kounkel et al.	2020	0.38	1.75	–	6	–	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
OCSN 225	97.4	83.84	-4.96	2.55	1.25	-0.08	22.73	0.36
NGC 1977	90.6	83.84	-4.86	2.53	1.26	-0.71	23.87	0.79
OMC-1	8.4	83.82	-5.37	2.5	0.95	-0.07	-7.13	0.39
Orion Nebula	7.3	83.82	-5.36	2.51	1.23	0.18	25.16	0.34
OMC-2	2.6	83.85	-5.17	2.54	1.04	-0.02	26.69	0.17

💡 Note: The % column shows the percentage of members that UBC 621 shares with each listed object.

Visualization

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