Trumpler 30
(Collinder 355; MWSC 2755; Harvard 18; OCL 1025; ESO 394 12)
- CN 0.79 Rich
- Cdens 1.0 Very dense
- CC3 1.0 Very high quality
- Clit 1.0 Very well-studied
- Cdup 1.0 Unique
Overview
Trumpler 30 is a rich, very dense object of very high C3 quality. Its parallax locates it at a relatively close distance, below the mid-plane. It is catalogued as a near-solar metallicity, intermediate-age cluster, but with a large variance across recent sources for the mass parameter (see Parameters). It is very well-studied in the literature. Note: This object shares a large percentage of members with a later reported entry. See table with shared members information.
Data
| Reference | Year | RA [deg] | DEC [deg] | Plx [mas] | pmRA [mas/yr] | pmDE [mas/yr] | Rv [km/s] |
|---|---|---|---|---|---|---|---|
| UCC | – | 269.174 | -35.304 | 0.7 | 1.173 | -2.217 | -20.057 |
| Almeida et al. | 2025 | 269.178 | -35.302 | – | – | – | – |
| Hunt & Reffert | 2024 | 269.186 | -35.284 | 0.701 | 1.145 | -2.23 | -24.19 |
| Cavallo et al. | 2024 | 269.174 | -35.314 | 0.7 | – | – | – |
| Hunt & Reffert | 2023 | 269.186 | -35.284 | 0.701 | 1.145 | -2.23 | -24.19 |
| Just et al. | 2023 | 269.218 | -35.271 | – | – | – | – |
| Tarricq et al. | 2022 | 269.176 | -35.296 | 0.679 | 1.155 | -2.24 | – |
| Dias et al. | 2021 | 269.178 | -35.302 | 0.707 | 1.246 | -2.184 | -18.671 |
| Cantat-Gaudin et al. | 2020 | 269.182 | -35.298 | 0.707 | 1.243 | -2.189 | – |
| Bossini et al. | 2019 | 269.182 | -35.298 | – | – | – | – |
| Soubiran et al. | 2018 | 269.182 | -35.298 | – | – | – | -18.36 |
| Bica et al. | 2019 | 269.205 | -35.259 | – | – | – | – |
| Cantat-Gaudin et al. | 2018 | 269.182 | -35.298 | 0.707 | 1.243 | -2.189 | – |
| Kharchenko et al. | 2016 | 269.218 | -35.271 | – | – | – | – |
| Kharchenko et al. | 2013 | 269.227 | -35.27 | – | 1.35 | -1.91 | – |
| Piskunov et al. | 2008 | 269.182 | -35.272 | – | – | – | – |
| Kharchenko et al. | 2005 | 269.19 | -35.27 | – | 3.82 | -0.13 | – |
| Kharchenko et al. | 2003 | 269.08 | -35.37 | – | -2.38 | -2.43 | – |
💡 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 | 1.22 | 0.61 | – | 589 | – | 364 | – | – |
| Hunt & Reffert | 2024 | – | – | – | – | – | 1351* | – | – |
| Cavallo et al. | 2024 | 1.13 | 1.73 | – | 178 | -0.650 | – | – | – |
| Hunt & Reffert | 2023 | 1.37 | 0.91 | 0.72 | 219 | – | – | – | – |
| Just et al. | 2023 | – | – | – | 224 | – | 610 | – | – |
| Tarricq et al. | 2022 | 1.30 | – | – | 490 | – | – | – | – |
| Dias et al. | 2021 | 1.22 | 0.61 | – | 589 | 0.324 | – | – | – |
| Cantat-Gaudin et al. | 2020 | 1.35 | 0.81 | – | 437 | – | – | – | – |
| Bossini et al. | 2019 | 1.26 | 0.93 | – | 368 | 0.000 | – | – | – |
| Soubiran et al. | 2018 | 1.36 | – | – | – | – | – | – | – |
| Cantat-Gaudin et al. | 2018 | 1.36 | – | – | – | – | – | – | – |
| Kharchenko et al. | 2016 | 1.98 | 1.48 | – | 224 | – | – | – | – |
| Kharchenko et al. | 2013 | 1.98 | 1.48 | – | 224 | – | – | – | – |
| Piskunov et al. | 2008 | 1.00 | 0.68 | – | 204 | – | – | – | – |
| Kharchenko et al. | 2005 | 1.00 | 0.68 | – | 204 | – | – | – | – |
| Kharchenko et al. | 2003 | 0.62 | 0.31 | – | – | – | – | – | – |
💡 Note: The parameters are sometimes
transformed from their original values to match the format of the
columns shown here, see FAQ.
The columns DAv, Bfr, BSS correspond to differential
extinction, binary fraction, and blue stragglers, respectively.
BSS values can be listed as fractions or integers.
(*): indicates that this parameter is
assigned more than one value in the corresponding reference.
