Trumpler 20
(Collinder 262; Harvard 7; OCL 888; ESO 131 13; FSR 1624; MWSC 2060)
Summary
Trumpler 20 is a very rich, very dense object of very high C3 quality. It is located at a moderate distance from the Sun, above the mid-plane. It is very well-studied in the literature.
This object shares a very small percentage of members with a later reported entry.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 189.879 | -60.633 | – | -2.22 | -1.94 | -40.8 |
| Kharchenko et al. (2012) | 189.938 | -60.635 | – | -14.65 | -3.12 | – |
| Cantat-Gaudin et al. (2018) | 189.882 | -60.637 | 0.251 | -7.089 | 0.18 | – |
| Bica et al. (2019) | 189.879 | -60.638 | – | – | – | – |
| Soubiran et al. (2018) | 189.882 | -60.637 | – | – | – | -39.78 |
| Cantat-Gaudin et al. (2020) | 189.882 | -60.637 | 0.251 | -7.089 | 0.18 | – |
| Dias et al. (2021) | 189.849 | -60.645 | 0.252 | -7.088 | 0.183 | -38.785 |
| Rain et al. (2021) | 189.882 | -60.637 | 0.251 | -7.089 | 0.18 | – |
| Hunt & Reffert (2023) | 189.888 | -60.633 | 0.271 | -7.11 | 0.193 | -40.333 |
| Cavallo et al. (2024) | 189.894 | -60.64 | 0.272 | – | – | – |
| Hunt & Reffert (2024) | 189.888 | -60.633 | 0.271 | -7.11 | 0.193 | -40.333 |
| Almeida et al. (2025) | 189.849 | -60.645 | – | – | – | – |
| Hu & Soubiran (2025) | 189.894 | -60.64 | – | – | – | – |
| UCC | 189.893 | -60.641 | 0.267 | -7.108 | 0.187 | -40.238 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.46, Dist=3300.0, Age=9.11, [Fe/H]=0.17 |
| Kharchenko et al. (2012) | e_bv=0.312, distance=3311, log_age=9.325, metallicity=-0.11 |
| Cantat-Gaudin et al. (2018) | dmode=3568.0 |
| Soubiran et al. (2018) | dmode=3568.0 |
| Cantat-Gaudin et al. (2020) | AVNN=0.88, DistPc=3392.0, AgeNN=9.27 |
| Dias et al. (2021) | Av=1.425, Dist=3386, logage=9.179, [Fe/H]=0.094 |
| Rain et al. (2021) | E(B-V)=0.46, Dist=3568.0, log(Age)=9.11, NBSS=12 |
| Hunt & Reffert (2023) | AV50=1.277, diffAV50=0.424, MOD50=12.64, logAge50=9.2 |
| Cavallo et al. (2024) | AV50=1.69, dMod50=12.17, logAge50=9.31, [Fe/H]50=-0.3 |
| Hunt & Reffert (2024) | MassJ=15258.9, MassTot=15334.5 |
| Almeida et al. (2025) | AV=1.425, Dist=3386, logAge=9.179, MassRk=4874.1 |
| Hu & Soubiran (2025) | MA22=-0.19, MA23f=-0.17, MA23g=0.04, MZ23=-0.16, MK24=-0.21, MF24=-0.09 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| OC 0583 | 1.6 | 189.92 | -60.66 | 0.21 | -7.1 | 0.17 | -41.01 | 0.0 |