Ivanov 4
Summary
Ivanov 4 is a poorly populated, very dense object of intermediate C3 quality. It is located at a moderate distance from the Sun, below the mid-plane. It is moderately studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 105.133 | -8.867 | – | 6.11 | -17.42 | – |
| Kharchenko et al. (2012) | 105.157 | -8.84 | – | 5.19 | -1.15 | – |
| Loktin & Popova (2017) | 105.135 | -8.866 | – | 1.225 | -0.459 | – |
| Cantat-Gaudin et al. (2018) | 105.144 | -8.861 | 0.355 | -1.355 | 1.022 | – |
| Cantat-Gaudin et al. (2020) | 105.144 | -8.861 | 0.355 | -1.355 | 1.022 | – |
| Dias et al. (2021) | 105.15 | -8.867 | 0.365 | -1.38 | 0.977 | – |
| Almeida et al. (2025) | 105.15 | -8.867 | – | – | – | – |
| UCC | 105.145 | -8.859 | 0.362 | -1.311 | 1.022 | -1.081 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.21, Dist=717.0, Age=7.0 |
| Kharchenko et al. (2012) | e_bv=0.521, distance=2025, log_age=8.3 |
| Loktin & Popova (2017) | E(B-V)=0.094, Dist=2340, logt=8.95 |
| Cantat-Gaudin et al. (2018) | dmode=2602.8 |
| Cantat-Gaudin et al. (2020) | AVNN=1.24, DistPc=2480.0, AgeNN=7.8 |
| Dias et al. (2021) | Av=1.369, Dist=2507, logage=7.061, [Fe/H]=-0.195 |
| Almeida et al. (2025) | AV=1.369, Dist=2507, logAge=7.061, MassRk=100.9 |
Search coordinates in Bayestar19