Melotte 204
(Collinder 382; IC 4725; M 25; OCL 38; ESO 591 06; MWSC 2940; FoF 2292)
Summary
Melotte 204 is a very rich, very dense object of very high C3 quality. It is located at a close distance from the Sun, near the mid-plane. It is very well-studied in the literature.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dambis (1999) | 277.946 | -19.117 | – | – | – | – |
| Dias et al. (2002) | 277.946 | -19.117 | – | -4.01 | -5.7 | 2.4 |
| Chen et al. (2003) | 277.95 | -19.177 | – | -2.78 | -6.15 | 3.0 |
| Piskunov et al. (2007) | 277.913 | -19.126 | – | – | – | – |
| Piskunov et al. (2008) | 277.913 | -19.126 | – | – | – | – |
| Kharchenko et al. (2012) | 277.928 | -19.11 | – | -2.2 | -6.09 | – |
| Loktin & Popova (2017) | 277.95 | -19.118 | – | -4.01 | -5.7 | -1.8 |
| Cantat-Gaudin et al. (2018) | 277.937 | -19.114 | 1.514 | -1.688 | -6.117 | – |
| Bica et al. (2019) | 277.936 | -19.126 | – | – | – | – |
| Soubiran et al. (2018) | 277.937 | -19.114 | – | – | – | 3.09 |
| Bossini et al. (2019) | 277.937 | -19.114 | – | – | – | – |
| Liu & Pang (2019) | 277.954 | -19.103 | 1.511 | -1.696 | -6.124 | – |
| Cantat-Gaudin et al. (2020) | 277.937 | -19.114 | 1.514 | -1.688 | -6.117 | – |
| Dias et al. (2021) | 277.938 | -19.112 | 1.513 | -1.687 | -6.112 | 10.314 |
| Rain et al. (2021) | 277.937 | -19.114 | 1.514 | -1.688 | -6.117 | – |
| Jaehnig et al. (2021) | 277.962 | -19.101 | 1.541 | -1.663 | -6.102 | – |
| Tarricq et al. (2022) | 277.93 | -19.125 | 1.513 | -1.694 | -6.141 | – |
| He et al. (2022) | 277.947 | -19.127 | 1.515 | -1.687 | -6.15 | – |
| Cordoni et al. (2023) | 277.938 | -19.112 | 1.513 | -1.687 | -6.112 | – |
| Hunt & Reffert (2023) | 277.942 | -19.131 | 1.512 | -1.692 | -6.165 | 2.015 |
| Cavallo et al. (2024) | 277.949 | -19.122 | 1.512 | – | – | – |
| Hunt & Reffert (2024) | 277.942 | -19.131 | 1.512 | -1.692 | -6.165 | 2.015 |
| Alfonso et al. (2024) | 277.944 | -19.119 | 1.475 | -1.686 | -6.156 | – |
| Almeida et al. (2025) | 277.938 | -19.112 | – | – | – | – |
| UCC | 277.938 | -19.117 | 1.512 | -1.687 | -6.143 | 2.392 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dambis (1999) | E_B-V_=0.484, DM0=8.62, log_age_=7.6 |
| Dias et al. (2002) | E(B-V)=0.476, Dist=620.0, Age=7.965, [Fe/H]=0.17 |
| Chen et al. (2003) | E(B-V)=0.476, HDis=620, Age=0.09, [Fe/H]_1=0.17, [Fe/H]_2=0.17 |
| Piskunov et al. (2007) | E(B-V)=0.45, Dist=620, logt=7.83, logM=2.677 |
| Piskunov et al. (2008) | E(B-V)=0.45, Dist=620, logt=7.83, logM=3.172, logMA=3.044 |
| Kharchenko et al. (2012) | e_bv=0.479, distance=561, log_age=7.97, metallicity=-0.257 |
| Loktin & Popova (2017) | E(B-V)=0.473, Dist=622, logt=7.965 |
| Cantat-Gaudin et al. (2018) | dmode=648.3 |
| Soubiran et al. (2018) | dmode=648.3 |
| Bossini et al. (2019) | AV=1.087, Dist=9.156, logA=7.984, Fe/H=0.0 |
| Liu & Pang (2019) | Age=0.068, Z=-0.25 |
| Cantat-Gaudin et al. (2020) | AVNN=0.84, DistPc=698.0, AgeNN=8.05 |
| Dias et al. (2021) | Av=1.358, Dist=638, logage=8.223, [Fe/H]=0.169 |
| Rain et al. (2021) | E(B-V)=0.35, Dist=648.3, log(Age)=7.98, NBSS=0 |
| Jaehnig et al. (2021) | dmode=0.649 |
| Tarricq et al. (2022) | Dist=686, logAgeNN=8.05 |
| He et al. (2022) | A0=1.65, logAge=7.9 |
| Cordoni et al. (2023) | Av=1.358, Dist=9.024, logAge=8.223, [Fe/H]=0.169, mass-single=1267.65, fbin-tot=0.252, fbss-MS=0.0 |
| Hunt & Reffert (2023) | AV50=1.361, diffAV50=1.572, MOD50=8.955, logAge50=7.982 |
| Cavallo et al. (2024) | AV50=1.36, dMod50=9.08, logAge50=8.23, [Fe/H]50=0.36 |
| Hunt & Reffert (2024) | MassJ=2247.85, MassTot=2276.24 |
| Alfonso et al. (2024) | AV=0.84223, MOD=9.21717, logAge=8.66458, Z=0.17170 |
| Almeida et al. (2025) | AV=1.358, Dist=638, logAge=8.223, MassRk=1253.7 |
Search coordinates in Bayestar19