Trumpler 15

(FoF 232)

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0.95 UTI
1.0
CN
1.0
Cdens
0.75
CC3
1.0
Clit
1.0
Cdup
N50 (P>50% members) 549
Stellar density (N50/rad) 85.9 [N/pc2]
C3 classification AB
  • CN 1.0 Very rich
  • Cdens 1.0 Very dense
  • CC3 0.75 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
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Trumpler 15 is a very rich, very dense object of high C3 quality. Its parallax locates it at a moderate distance, near the mid-plane, affected by moderate extinction. It is catalogued as a near-solar metallicity, very young cluster, but with a large variance across recent sources for the metallicity parameter (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. Gold sample.

Cavallo et al. (2024)
Gold sample.

Data
🔍 Search references for Trumpler 15 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– 161.175 -59.374 0.391 -6.206 2.085 9.881
Almeida et al. 2025 161.179 -59.372 – – – –
Hunt & Reffert 2024 161.174 -59.369 0.387 -6.093 2.068 23.263
Celli et al. 2024 161.177 -59.369 – – – –
Cavallo et al. 2024 161.18 -59.375 0.388 – – –
Hunt & Reffert 2023 161.174 -59.369 0.387 -6.093 2.068 23.263
Almeida et al. 2023 161.186 -59.372 – – – –
Jaehnig et al. 2021 161.093 -59.533 0.419 -6.413 2.039 –
Rain et al. 2021 161.177 -59.369 0.398 -6.209 2.016 –
Dias et al. 2021 161.179 -59.372 0.396 -6.188 2.017 –
Cantat-Gaudin et al. 2020 161.177 -59.369 0.398 -6.209 2.016 –
Cantat-Gaudin & Anders 2020 161.177 -59.369 0.398 -6.209 2.016 –
Liu & Pang 2019 161.176 -59.372 0.398 -6.192 2.064 –
Dias et al. 2019 161.179 -59.369 0.398 -6.209 2.016 16.59
Cantat-Gaudin et al. 2018 161.177 -59.369 0.398 -6.209 2.016 –
Loktin & Popova 2017 161.175 -59.367 – -7.71 3.26 -13.2
Dias et al. 2014 161.179 -59.367 – -4.13 0.19 –
Gozha et al. 2012 161.179 -59.367 – – – –
Piskunov et al. 2008 161.178 -59.368 – – – –
Kharchenko et al. 2007 161.17 -59.37 – 0.08 – -9.0
van den Bergh 2006 161.175 -59.367 – – – –
Kharchenko et al. 2005 161.17 -59.37 – -2.08 3.53 –
Kharchenko et al. 2003 161.16 -59.35 – -2.44 2.91 –
Dias et al. 2002 161.179 -59.367 – -7.71 3.26 -15.06
Dambis 1999 161.179 -59.367 – – – –

💡 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– 2.29 1.48 1.96 8 0.013 925 0.67 0.0
Almeida et al. 2025 2.29 1.61 – 7 – 1027 – –
Hunt & Reffert 2024 – – – – – 647(1) – –
Celli et al. 2024 – – – 9 – 925 – –
Cavallo et al. 2024 2.08 1.58 – 5 -0.570 – – –
Hunt & Reffert 2023 2.40 1.69 1.96 8 – – – –
Almeida et al. 2023 2.30 1.64 – 8 0.013 1052(1) 0.67 –
Jaehnig et al. 2021 2.38(1) – – – – – – –
Rain et al. 2021 2.34 1.33 – 8 – – – 0
Dias et al. 2021 2.29 1.61 – 7 -0.124 – – –
Cantat-Gaudin et al. 2020 2.59 1.50 – 9 – – – –
Cantat-Gaudin & Anders 2020 2.34 – – – – – – –
Liu & Pang 2019 – – – 8 0.500 – – –
Dias et al. 2019 3.69 1.46 – 5 1.016 – – –
Cantat-Gaudin et al. 2018 2.34 – – – – – – –
Loktin & Popova 2017 3.12 1.97 – 8 – – – –
Gozha et al. 2012 1.85 – – 8 – 224 – –
Piskunov et al. 2008 2.12 1.40 – 12 – – – –
van den Bergh 2006 1.85 1.33 – 9 – – – –
Kharchenko et al. 2005 2.12 1.40 – 12 – – – –
Kharchenko et al. 2003 1.85 1.33 – – – – – –
Dias et al. 2002 1.85 1.35 – 8 – – – –
Dambis 1999 2.19 1.48 – 3 – – – –

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

Cluster % RA DEC Plx pmRA pmDE Rv UTI
Collinder 232 1.3 161.09 -59.55 0.38 -6.6 2.06 17.58 0.05

💡 Note: The % column shows the percentage of members that Trumpler 15 shares with each listed object.

Visualization
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Trumpler 15 UCC
Trumpler 15 HUNT23
Trumpler 15 CANTAT20
Galactocentric position diagram