Mamajek 1
(eta Chamaeleontis; MWSC 1535; OCSN 215)
Summary
Mamajek 1 is a poorly populated, very dense object of high C3 quality. It is located at a very close distance from the Sun, near the mid-plane. It is well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 130.525 | -79.027 | – | -30.0 | 27.8 | 16.1 |
| Piskunov et al. (2008) | 130.536 | -79.024 | – | – | – | – |
| Cantat-Gaudin et al. (2018) | 130.637 | -78.963 | 10.13 | -29.834 | 26.99 | – |
| Bica et al. (2019) | 130.484 | -79.008 | – | – | – | – |
| Soubiran et al. (2018) | 130.637 | -78.963 | – | – | – | 16.69 |
| Cantat-Gaudin et al. (2020) | 130.637 | -78.963 | 10.13 | -29.834 | 26.99 | – |
| Dias et al. (2021) | 130.568 | -78.946 | 10.141 | -29.451 | 27.134 | 16.746 |
| Qin et al. (2023) | 130.64 | -78.98 | 10.16 | -29.31 | 27.48 | 16.0 |
| Hunt & Reffert (2023) | 130.564 | -78.973 | 10.178 | -30.186 | 26.756 | 16.388 |
| Cavallo et al. (2024) | 131.041 | -79.045 | 10.178 | – | – | – |
| Celli et al. (2024) | 130.637 | -78.963 | – | – | – | – |
| Almeida et al. (2025) | 130.568 | -78.946 | – | – | – | – |
| UCC | 131.132 | -78.912 | 9.984 | -29.092 | 27.014 | 15.998 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.0, Dist=97.0, Age=6.9 |
| Piskunov et al. (2008) | E(B-V)=0.0, Dist=105, logt=6.9, logMA=-0.373 |
| Cantat-Gaudin et al. (2018) | dmode=104.0 |
| Soubiran et al. (2018) | dmode=104.0 |
| Dias et al. (2021) | Av=0.119, Dist=98, logage=7.194, [Fe/H]=-0.099 |
| Qin et al. (2023) | E(B-V)=0.04, m-M=5.02, logt=6.9 |
| Hunt & Reffert (2023) | AV50=0.344, diffAV50=0.342, MOD50=4.976, logAge50=6.649 |
| Cavallo et al. (2024) | AV50=1.08, dMod50=4.89, logAge50=7.17, [Fe/H]50=0.06 |
| Celli et al. (2024) | Age=9.8, Mc=26.9 |
| Almeida et al. (2025) | AV=0.119, Dist=98, logAge=7.194, MassRk=5.6 |
Search coordinates in Bayestar19