OC 0618

0.00 UTI

0.48

C_N

1.0

C_dens

1.0

C_C3

0.0

C_lit

0.0

C_dup

C3 classification AA

Number of members (P>50%) 48

Radius (P>50% members) 1.8 [arcmin]

C_N 0.48 Poorly populated
C_dens 1.0 Very dense
C_C3 1.0 Very high quality
C_lit 0.0 Rarely studied
C_dup 0.0 Very likely duplicate

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

Overview

ℹ️

OC 0618 is a poorly populated, very dense object of very high C3 quality. Its parallax locates it at a moderate^* distance, above 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.

⚠️ 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.

(*): The parallax distance estimate (~2.08 kpc) differs significantly from the median photometric distance (~3.11 kpc).

Distant Moderate extinction Massive Near-solar metallicity Intermediate age

Data

🔍 Search references for OC 0618 in: SciX Simbad

ℹ️

Reference	Year	RA [deg]	DEC [deg]	Plx [mas]	pmRA [mas/yr]	pmDE [mas/yr]	Rv [km/s]
UCC	–	220.866	-57.58	0.48	-3.514	-2.291	-26.282
Wei et al.	2025	220.853	-57.601	0.464	-3.44	-2.29	–
Hao et al.	2022	220.857	-57.584	0.519	-3.541	-2.286	–

💡 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
Wei et al.	2025	3.11	1.93	–	955	0.000	2333	0.61	–
Hao et al.	2022	–	1.87	–	501	0.223	–	–	–

Cluster	%	RA	DEC	Plx	pmRA	pmDE	Rv	UTI
Melotte 128	100.0	220.86	-57.58	0.46	-3.47	-2.3	-26.83	0.96

💡 Note: The % column shows the percentage of members that OC 0618 shares with each listed object.

Visualization

ℹ️