Ruprecht 4
(Berkeley 74; OCL 560; FSR 1165; MWSC 990)
Summary
Ruprecht 4 is a rich, very dense object of high C3 quality. It is located at a moderate distance from the Sun, below the mid-plane. It is well-studied in the literature.
This object shares a small percentage of members with 2 later reported entries.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 102.225 | -10.533 | – | 0.94 | -4.3 | 47.5 |
| Kharchenko et al. (2012) | 102.24 | -10.51 | – | 1.79 | 2.17 | – |
| Loktin & Popova (2017) | 102.24 | -10.51 | – | 0.562 | 0.347 | 47.5 |
| Cantat-Gaudin et al. (2018) | 102.248 | -10.524 | 0.214 | -0.197 | 0.096 | – |
| Bica et al. (2019) | 102.248 | -10.514 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 102.248 | -10.524 | 0.214 | -0.197 | 0.096 | – |
| Dias et al. (2021) | 102.243 | -10.529 | 0.209 | -0.205 | 0.126 | – |
| Hunt & Reffert (2023) | 102.245 | -10.53 | 0.211 | -0.215 | 0.098 | 46.518 |
| Cavallo et al. (2024) | 102.235 | -10.52 | 0.213 | – | – | – |
| Hunt & Reffert (2024) | 102.245 | -10.53 | 0.211 | -0.215 | 0.098 | 46.518 |
| Almeida et al. (2025) | 102.243 | -10.529 | – | – | – | – |
| Hu & Soubiran (2025) | 102.235 | -10.52 | – | – | – | – |
| UCC | 102.247 | -10.526 | 0.218 | -0.213 | 0.103 | 46.421 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.3, Dist=4700.0, Age=8.9, [Fe/H]=-0.09 |
| Kharchenko et al. (2012) | e_bv=0.458, distance=4591, log_age=9.005, metallicity=-0.09 |
| Loktin & Popova (2017) | E(B-V)=0.559, Dist=5816, logt=8.8 |
| Cantat-Gaudin et al. (2018) | dmode=4123.8 |
| Cantat-Gaudin et al. (2020) | AVNN=1.24, DistPc=4087.0, AgeNN=8.93 |
| Dias et al. (2021) | Av=1.673, Dist=3598, logage=8.808, [Fe/H]=-0.1 |
| Hunt & Reffert (2023) | AV50=1.455, diffAV50=1.627, MOD50=12.936, logAge50=8.759 |
| Cavallo et al. (2024) | AV50=1.55, dMod50=12.51, logAge50=8.99, [Fe/H]50=-0.24 |
| Hunt & Reffert (2024) | MassJ=1660.29, MassTot=1668.24 |
| Almeida et al. (2025) | AV=1.673, Dist=3598, logAge=8.808, MassRk=482.0 |
| Hu & Soubiran (2025) | MA22=-0.25, MA23f=-0.43, MA23g=-0.24, MZ23=-0.43, MK24=-0.31, MF24=-0.27 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| OC 0371 | 14.3 | 102.24 | -10.53 | 0.24 | -0.2 | 0.1 | 48.23 | 0.0 |
| OC 0372 | 11.9 | 102.24 | -10.52 | 0.23 | -0.21 | 0.1 | 48.23 | 0.0 |