NGC 133

(MWSC 55)

0.69 UTI

0.52

C_N

0.51

C_dens

1.0

C_C3

0.71

C_lit

1.0

C_dup

N_m (P>50%) 54

Core radius and density 1.7 [pc], 2.5 [pc^-2]

C3 classification AA

C_N 0.52 Moderately populated
C_dens 0.51 Moderately dense
C_C3 1.0 Very high quality
C_lit 0.71 Moderately studied
C_dup 1.0 Unique

📥 Members 📊 Colab 🔬 Bayestar19

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

Overview

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NGC 133 is a moderately populated, moderately 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 near-solar metallicity, young cluster, but with a large variance across recent sources for the age and mass parameters (see Parameters). It is moderately studied in the literature.

(*): The parallax distance estimate (~4.47 kpc) differs significantly from the median photometric distance (~1.86 kpc).

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

Relatively close Moderate extinction Near-solar metallicity Young

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

Cavallo et al. (2024)
Gold sample.

Hunt & Reffert (2024)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Hunt & Reffert (2023)
Classified as open cluster. CMD class: 1.00 (50th percentile).

Data

🔍 Search references for NGC 133 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–	7.816	63.386	0.224	-2.398	-0.489	-86.699
Almeida et al.	2025	7.832	63.358	–	–	–	–
Hunt & Reffert	2024	7.801	63.386	0.222	-2.423	-0.5	-86.441
Cavallo et al.	2024	7.798	63.387	0.224	–	–	–
Hunt & Reffert	2023	7.801	63.386	0.222	-2.423	-0.5	-86.441
Just et al.	2023	7.809	63.342	–	–	–	–
Jaehnig et al.	2021	7.828	63.372	0.28	-2.55	-0.434	–
Dias et al.	2021	7.832	63.358	0.223	-2.324	-0.41	-86.916
Dias et al.	2018	–	–	–	-1.97	-0.09	–
Dib et al.	2018	7.819	63.345	–	–	–	–
Loktin & Popova	2017	7.83	63.35	–	-3.456	-2.2	–
Sampedro et al.	2017	7.829	63.35	–	-2.9	0.42	–
Kharchenko et al.	2016	7.809	63.342	–	–	–	–
Dias et al.	2014	7.829	63.35	–	-2.65	0.67	–
Kharchenko et al.	2013	7.819	63.345	–	-1.92	-1.17	–
Kharchenko et al.	2012	7.819	63.345	–	-1.92	-1.17	–
Bukowiecki et al.	2011	7.829	63.384	–	–	–	–
Ahumada & Lapasset	2007	7.825	63.35	–	–	–	–
van den Bergh	2006	7.8	63.367	–	–	–	–
Dias et al.	2002	7.829	63.35	–	-0.7	-0.4	–
Lynga	1987	7.811	63.353	–	–	–	–
Sulentic et al.	1973	7.782	63.354	–	–	–	–

💡 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–	1.86	1.97	0.55	20	0.010	520	–	0
Almeida et al.	2025	3.31	2.31	–	159	–	1088	–	–
Hunt & Reffert	2024	4.07	2.29	0.55	159	–	821⁽¹⁾	–	–
Cavallo et al.	2024	3.55	2.32	–	288	0.010	–	–	–
Hunt & Reffert	2023	4.08	2.29	0.55	159	–	–	–	–
Just et al.	2023	–	–	–	20	–	13	–	–
Jaehnig et al.	2021	3.57⁽¹⁾	–	–	–	–	–	–	–
Dias et al.	2021	3.31	2.31	–	159	-0.133	–	–	–
Dib et al.	2018	1.86	–	–	20	–	–	–	–
Loktin & Popova	2017	1.53	1.99	–	52	–	–	–	–
Kharchenko et al.	2016	1.86	1.97	–	20	–	–	–	–
Perren et al.	2015	0.60⁽¹⁾	0.00⁽¹⁾	–	1000⁽¹⁾	0.300⁽¹⁾	–	–	–
Kharchenko et al.	2013	1.86	1.97	–	20	–	–	–	–
Bukowiecki et al.	2012	–	–	–	–	–	218	–	–
Kharchenko et al.	2012	1.86	1.97	–	20	–	–	–	–
Bukowiecki et al.	2011	1.31⁽¹⁾	1.48	–	18	–	–	–	–
Ahumada & Lapasset	2007	–	1.89	–	10	–	–	–	0
van den Bergh	2006	0.63	1.89	–	10	–	–	–	–
Dias et al.	2002	0.63	1.89	–	10	–	–	–	–

(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 185	98.1	7.81	63.39	0.22	-2.42	-0.49	-86.7	0.1

💡 Note: The % column shows the percentage of members that NGC 133 shares with each listed object.

Visualization

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