Berkeley 4
(OCL 307; MWSC 73)
Summary
Berkeley 4 is a rich, 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 3 later reported entries.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 11.254 | 64.385 | – | -3.21 | -1.3 | – |
| Piskunov et al. (2007) | 11.351 | 64.394 | – | – | – | – |
| Piskunov et al. (2008) | 11.351 | 64.394 | – | – | – | – |
| Kharchenko et al. (2012) | 11.268 | 64.382 | – | -0.23 | 1.01 | – |
| Loktin & Popova (2017) | 11.25 | 64.385 | – | 1.112 | 1.163 | – |
| Cantat-Gaudin et al. (2018) | 11.291 | 64.391 | 0.296 | -2.421 | -0.236 | – |
| Bica et al. (2019) | 11.282 | 64.393 | – | – | – | – |
| Soubiran et al. (2018) | 11.291 | 64.391 | – | – | – | -53.13 |
| Dias et al. (2019) | 11.254 | 64.385 | 0.284 | -2.421 | -0.269 | -53.13 |
| Cantat-Gaudin et al. (2020) | 11.291 | 64.391 | 0.296 | -2.421 | -0.236 | – |
| Dias et al. (2021) | 11.273 | 64.389 | 0.291 | -2.427 | -0.233 | – |
| Hunt & Reffert (2023) | 11.299 | 64.39 | 0.306 | -2.409 | -0.298 | -63.639 |
| Cavallo et al. (2024) | 11.293 | 64.397 | 0.306 | – | – | – |
| Celli et al. (2024) | 11.284 | 64.392 | – | – | – | – |
| Hunt & Reffert (2024) | 11.299 | 64.39 | 0.306 | -2.409 | -0.298 | -63.639 |
| Almeida et al. (2025) | 11.273 | 64.389 | – | – | – | – |
| UCC | 11.299 | 64.391 | 0.305 | -2.402 | -0.309 | -60.436 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.83, Dist=2460.0, Age=7.1 |
| Piskunov et al. (2007) | E(B-V)=0.7, Dist=3200, logt=7.08, logM=2.815 |
| Piskunov et al. (2008) | E(B-V)=0.7, Dist=3200, logt=7.08, logM=3.751, logMA=3.803 |
| Kharchenko et al. (2012) | e_bv=0.7, distance=3300, log_age=7.3 |
| Loktin & Popova (2017) | E(B-V)=0.198, Dist=2377, logt=7.7 |
| Cantat-Gaudin et al. (2018) | dmode=3077.9 |
| Soubiran et al. (2018) | dmode=3077.9 |
| Dias et al. (2019) | E(B-V)=0.65, Dist=2744, logAge=7.181, Z=0.005 |
| Cantat-Gaudin et al. (2020) | AVNN=2.16, DistPc=3121.0, AgeNN=7.33 |
| Dias et al. (2021) | Av=2.222, Dist=2662, logage=7.118, [Fe/H]=-0.103 |
| Hunt & Reffert (2023) | AV50=2.441, diffAV50=1.426, MOD50=12.35, logAge50=7.237 |
| Cavallo et al. (2024) | AV50=2.29, dMod50=12.8, logAge50=7.02, [Fe/H]50=0.35 |
| Celli et al. (2024) | Age=21.4, Mc=473.4 |
| Hunt & Reffert (2024) | MassJ=2170.57, MassTot=2171.62 |
| Almeida et al. (2025) | AV=2.222, Dist=2662, logAge=7.118, MassRk=460.0 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| CWWDL 11734 | 26.4 | 11.33 | 64.37 | 0.32 | -2.43 | -0.37 | – | 0.12 |
| OC 0229 | 13.6 | 11.28 | 64.39 | 0.3 | -2.43 | -0.34 | – | 0.0 |
| OC 0230 | 11.4 | 11.28 | 64.38 | 0.32 | -2.44 | -0.36 | – | 0.0 |