Mamajek 4
(Alessi 71; MWSC 2914; OCSN 217)
Summary
Mamajek 4 is a rich, very dense object of high C3 quality. It is located at a very close distance from the Sun, below the mid-plane. It is very well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 276.5 | -51.0 | – | 4.4 | -19.4 | -43.4 |
| Kharchenko et al. (2012) | 276.533 | -50.955 | – | 3.9 | -19.2 | – |
| Cantat-Gaudin et al. (2018) | 276.635 | -50.772 | 2.224 | 4.646 | -21.051 | – |
| Bica et al. (2019) | 276.506 | -50.998 | – | – | – | – |
| Soubiran et al. (2018) | 276.635 | -50.772 | – | – | – | -26.32 |
| Bossini et al. (2019) | 276.635 | -50.772 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 276.635 | -50.772 | 2.224 | 4.646 | -21.051 | – |
| Dias et al. (2021) | 276.644 | -50.879 | 2.227 | 4.639 | -21.015 | -27.42 |
| Tarricq et al. (2022) | 276.808 | -50.76 | 2.217 | 4.424 | -21.421 | – |
| He et al. (2022) | 276.567 | -50.608 | 2.222 | 4.625 | -20.897 | – |
| Qin et al. (2023) | 276.58 | -50.71 | 2.23 | 4.06 | -21.71 | -28.65 |
| Hunt & Reffert (2023) | 276.371 | -50.637 | 2.219 | 3.659 | -21.67 | -29.69 |
| Cavallo et al. (2024) | 274.531 | -52.302 | 2.221 | – | – | – |
| Hunt & Reffert (2024) | 276.371 | -50.637 | 2.219 | 3.659 | -21.67 | -29.69 |
| Alfonso et al. (2024) | 276.203 | -50.986 | 2.183 | 4.422 | -21.294 | – |
| Almeida et al. (2025) | 276.644 | -50.879 | – | – | – | – |
| UCC | 276.574 | -50.76 | 2.23 | 4.598 | -21.066 | -29.314 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.05, Dist=385.0, Age=8.8 |
| Kharchenko et al. (2012) | e_bv=0.05, distance=386, log_age=8.815 |
| Cantat-Gaudin et al. (2018) | dmode=443.8 |
| Soubiran et al. (2018) | dmode=443.8 |
| Bossini et al. (2019) | AV=0.199, Dist=8.029, logA=8.824, Fe/H=0.0 |
| Cantat-Gaudin et al. (2020) | AVNN=0.31, DistPc=461.0, AgeNN=8.57 |
| Dias et al. (2021) | Av=0.207, Dist=441, logage=8.847, [Fe/H]=0.049 |
| Tarricq et al. (2022) | Dist=454, logAgeNN=8.57 |
| He et al. (2022) | A0=0.55, logAge=7.9 |
| Qin et al. (2023) | E(B-V)=0.13, m-M=8.61, logt=8.9 |
| Hunt & Reffert (2023) | AV50=0.198, diffAV50=0.851, MOD50=8.161, logAge50=8.494 |
| Cavallo et al. (2024) | AV50=0.39, dMod50=8.29, logAge50=8.53, [Fe/H]50=0.48 |
| Hunt & Reffert (2024) | MassJ=113.718, MassTot=702.657 |
| Alfonso et al. (2024) | AV=0.30906, MOD=8.32004, logAge=8.73351, Z=0.04894 |
| Almeida et al. (2025) | AV=0.207, Dist=441, logAge=8.847, MassRk=167.0 |
Search coordinates in Bayestar19