NGC 133

(MWSC 55)

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0.82 UTI
0.52
CN
1.0
Cdens
1.0
CC3
0.79
Clit
1.0
Cdup
C3 classification AA
Number of members (P>50%) 54
Radius (P>50% members) 1.6 [arcmin]
  • CN 0.52 Moderately populated
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 0.79 Well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

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

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 – 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
Loktin & Popova 2017 7.83 63.35 – -3.456 -2.2 –
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 –
van den Bergh 2006 7.8 63.367 – – – –
Dias et al. 2002 7.829 63.35 – -0.7 -0.4 –

💡 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
Almeida et al. 2025 3.31 2.31 – 159 – 1088 – –
Hunt & Reffert 2024 – – – – – 821* – –
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* – – – – – – –
Dias et al. 2021 3.31 2.31 – 159 -0.133 – – –
Loktin & Popova 2017 1.53 1.96 – 52 – – – –
Kharchenko et al. 2016 1.86 1.94 – 20 – – – –
Kharchenko et al. 2013 1.86 1.94 – 20 – – – –
Kharchenko et al. 2012 1.86 1.94 – 20 – – – –
van den Bergh 2006 0.63 1.86 – 10 – – – –
Dias et al. 2002 0.63 1.86 – 10 – – – –

(*): Indicates that this parameter is assigned more than one value 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 0.12

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

Visualization
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NGC 133 UCC
NGC 133 HUNT23
Galactocentric position diagram