Trumpler 4
(Collinder 80; IC 2157; MWSC 722; OCL 465; FSR 0867)
Summary
Trumpler 4 is a moderately populated, very dense object of 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 moderate percentage of members with a later reported entry.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 91.208 | 24.056 | – | -1.05 | -3.36 | – |
| Kharchenko et al. (2013) | 91.207 | 24.07 | – | -0.54 | -3.01 | – |
| Kharchenko et al. (2016) | 91.199 | 24.071 | – | – | – | – |
| Loktin & Popova (2017) | 91.215 | 24.07 | – | -0.172 | -0.85 | – |
| Cantat-Gaudin et al. (2018) | 91.183 | 24.091 | 0.448 | 0.959 | -2.982 | – |
| Bica et al. (2019) | 91.2 | 24.077 | – | – | – | – |
| Bossini et al. (2019) | 91.183 | 24.091 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 91.183 | 24.091 | 0.448 | 0.959 | -2.982 | – |
| Dias et al. (2021) | 91.186 | 24.084 | 0.442 | 0.966 | -2.99 | – |
| Rain et al. (2021) | 91.183 | 24.091 | 0.448 | 0.959 | -2.982 | – |
| Jaehnig et al. (2021) | 91.195 | 24.077 | 0.487 | 0.953 | -2.981 | – |
| Just et al. (2023) | 91.199 | 24.071 | – | – | – | – |
| Hunt & Reffert (2023) | 91.201 | 24.087 | 0.474 | 0.978 | -3.019 | – |
| Cavallo et al. (2024) | 91.184 | 24.088 | 0.475 | – | – | – |
| Hunt & Reffert (2024) | 91.201 | 24.087 | 0.474 | 0.978 | -3.019 | – |
| Zhang et al. (2024) | 91.201 | 24.087 | – | – | – | – |
| Almeida et al. (2025) | 91.186 | 24.084 | – | – | – | – |
| UCC | 91.184 | 24.096 | 0.463 | 0.965 | -2.989 | -27.386 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.548, Dist=2040.0, Age=7.8 |
| Kharchenko et al. (2013) | E(B-V)=0.562, d=2311.0, logt=7.9 |
| Kharchenko et al. (2016) | E(B-V)=0.562, d=2311.0, logt=7.9 |
| Loktin & Popova (2017) | E(B-V)=0.551, Dist=1895, logt=7.814 |
| Cantat-Gaudin et al. (2018) | dmode=2097.0 |
| Bossini et al. (2019) | AV=1.507, Dist=11.909, logA=7.618, Fe/H=0.0 |
| Cantat-Gaudin et al. (2020) | AVNN=1.1, DistPc=2020.0, AgeNN=8.18 |
| Dias et al. (2021) | Av=1.651, Dist=1885, logage=7.552, [Fe/H]=-0.098 |
| Rain et al. (2021) | E(B-V)=0.48, Dist=2097.0, log(Age)=7.61, NBSS=0 |
| Jaehnig et al. (2021) | dmode=2.081 |
| Just et al. (2023) | logt=7.9, logmt=2.042 |
| Hunt & Reffert (2023) | AV50=1.414, diffAV50=0.598, MOD50=11.417, logAge50=7.872 |
| Cavallo et al. (2024) | AV50=1.3, dMod50=11.5, logAge50=8.25, [Fe/H]50=0.53 |
| Hunt & Reffert (2024) | MassJ=479.667, MassTot=479.667 |
| Zhang et al. (2024) | [Fe/H]ANN=-0.2036, [Fe/H]MCMC=-0.1815 |
| Almeida et al. (2025) | AV=1.651, Dist=1885, logAge=7.552, MassRk=234.7 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| OC 0305 | 36.7 | 91.19 | 24.09 | 0.47 | 0.97 | -2.99 | – | 0.0 |