Trumpler 3

(Collinder 36; MWSC 262; Harvard 1; OCL 366; FoF 2355)

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1.0 UTI
1.0
CN
1.0
Cdens
1.0
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 784
Stellar density (N50/rad) 59.2 [N/pc2]
C3 classification AA
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 1.0 Very high quality
  • Clit 1.0 Very well-studied
  • Cdup 1.0 Unique
đŸ“Ĩ Members 📊 Colab đŸ”Ŧ Bayestar19 MOCAMOCA 🔍 CDS 🔍 Simbad 🔍 CDS (Îą, δ) 🔍 Simbad (Îą, δ)

Overview
ℹī¸
Trumpler 3 is a very rich, very dense object of very high C3 quality. Its parallax locates it at a close distance, above the mid-plane, affected by low extinction. It is catalogued as a near-solar metallicity, young cluster, but with a large variance across recent sources for the metallicity and mass parameters (see Parameters). It is very well-studied in the literature.

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

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

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Trumpler 3 in: SciX Simbad
ℹī¸
Reference Year RA [deg] DEC [deg] Plx [mas] pmRA [mas/yr] pmDE [mas/yr] Rv [km/s]
UCC 99999– 47.997 63.199 1.479 -3.398 -0.153 -22.375
Li et al. 2025 48.004 63.218 1.461 -3.354 -0.112 –
Wei et al. 2025 48.081 63.204 1.489 -3.413 -0.158 –
Almeida et al. 2025 48.017 63.22 – – – –
Alfonso et al. 2024 48.004 63.22 1.458 -3.411 -0.154 –
Hunt & Reffert 2024 48.005 63.207 1.491 -3.394 -0.151 -22.029
Cavallo et al. 2024 48.066 63.218 1.479 – – –
Hunt & Reffert 2023 48.005 63.207 1.491 -3.394 -0.151 -22.029
Almeida et al. 2023 48.021 63.195 – – – –
Just et al. 2023 48.038 63.148 – – – –
He et al. 2022 47.988 63.228 1.479 -3.405 -0.153 –
Dias et al. 2021 48.017 63.22 1.454 -3.351 -0.127 -22.273
Cantat-Gaudin et al. 2020 48.004 63.218 1.461 -3.354 -0.112 –
Donor et al. 2020 48.053 63.15 – 1.0 -1.05 -10.1
Cantat-Gaudin & Anders 2020 48.004 63.218 1.461 -3.354 -0.112 –
Liu & Pang 2019 48.032 63.233 1.459 -3.305 -0.096 –
Soubiran et al. 2018 48.004 63.218 – – – -19.46
Bica et al. 2019 48.016 63.157 – – – –
Cantat-Gaudin et al. 2018 48.004 63.218 1.461 -3.354 -0.112 –
Kharchenko et al. 2016 48.038 63.148 – – – –
Dias et al. 2014 47.95 63.25 – -2.88 -0.7 –
Kharchenko et al. 2013 48.052 63.15 – -1.8 1.6 -8.6
Gozha et al. 2012 47.95 63.25 – – – –
Kharchenko et al. 2012 48.052 63.15 – -1.8 1.6 -8.58
Piskunov et al. 2008 47.952 63.186 – – – –
Piskunov et al. 2007 47.952 63.186 – – – –
Kharchenko et al. 2005 47.95 63.19 – -2.42 0.89 –
Kharchenko et al. 2003 47.97 63.17 – -2.01 0.54 –
Dias et al. 2002 47.95 63.25 – -2.88 -0.7 -8.58

💡 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] Bfrac BSS
UCC 99999– 0.66 0.74 0.85 78 0.013 364 0.51 –
Li et al. 2025 0.67 0.89 – 53 0.146 – – –
Wei et al. 2025 0.72 1.08 – 30 0.000 689 0.54 –
Almeida et al. 2025 0.65 1.25 – 42 – 703 – –
Alfonso et al. 2024 0.69 0.69 – 33 -0.208 – – –
Hunt & Reffert 2024 – – – – – 863(1) – –
Cavallo et al. 2024 0.70 1.05 – 28 -0.010 – – –
Hunt & Reffert 2023 0.65 0.79 0.85 38 – – – –
Almeida et al. 2023 0.66 1.10 – 56 0.025 444(1) 0.48 –
Just et al. 2023 – – – 101 – 161 – –
He et al. 2022 – 1.15 – 40 – – – –
Dias et al. 2021 0.65 1.25 – 42 -0.210 – – –
Cantat-Gaudin et al. 2020 0.70 0.69 – 47 – – – –
Donor et al. 2020 – – – – 0.140 – – –
Cantat-Gaudin & Anders 2020 0.67 – – – – – – –
Liu & Pang 2019 – – – 380 0.250 – – –
Soubiran et al. 2018 0.67 – – – – – – –
Cantat-Gaudin et al. 2018 0.67 – – – – – – –
Kharchenko et al. 2016 0.62 0.69 – 101 – – – –
Kharchenko et al. 2013 0.62 0.69 – 101 – – – –
Gozha et al. 2012 0.83 – – 200 – 158 – –
Kharchenko et al. 2012 0.62 0.69 – 101 – – – –
Piskunov et al. 2008 0.45 0.68 – 219 – 285(1) – –
Piskunov et al. 2007 0.45 0.68 – 219 – 135 – –
Kharchenko et al. 2005 0.45 0.68 – 219 – – – –
Kharchenko et al. 2003 0.83 0.93 – – – – – –
Dias et al. 2002 0.46 0.59 – 200 – – – –

(N): Indicates that there are N extra values assigned to this parameter in the corresponding reference.

Cluster % RA DEC Plx pmRA pmDE Rv UTI
HSC 1119 3.2 48.0 63.2 1.63 -3.5 -0.02 -25.92 0.0

💡 Note: The % column shows the percentage of members that Trumpler 3 shares with each listed object.

Visualization
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Trumpler 3 UCC
Trumpler 3 HUNT23
Trumpler 3 CANTAT20
Galactocentric position diagram