Melotte 22
(Collinder 42; Pleiades; MWSC 305; Messier 45; M45; OCL 421; Escorial 1; OCSN 219)
Summary
Melotte 22 is a very rich, very dense object of very high C3 quality. It is located at a very 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) | 56.75 | 24.117 | – | – | – | – |
| Dias et al. (2002) | 56.75 | 24.117 | – | 19.88 | -45.0 | 5.94 |
| Chen et al. (2003) | 56.75 | 24.118 | – | 19.15 | -45.72 | 5.6 |
| Kharchenko et al. (2003) | 56.83 | 24.12 | – | 19.44 | -44.41 | – |
| Kharchenko et al. (2005) | 56.83 | 24.12 | – | 19.33 | -45.0 | 5.41 |
| Piskunov et al. (2007) | 56.832 | 24.118 | – | – | – | – |
| Kharchenko et al. (2007) | 56.74 | 24.12 | – | 6.4 | – | 5.9 |
| Piskunov et al. (2008) | 56.832 | 24.118 | – | – | – | – |
| Kharchenko et al. (2012) | 56.505 | 24.37 | – | 19.4 | -46.0 | 5.9 |
| Kharchenko et al. (2013) | 56.505 | 24.37 | – | 19.4 | -46.0 | 5.5 |
| Kharchenko et al. (2016) | 56.497 | 24.369 | – | – | – | – |
| Loktin & Popova (2017) | 56.745 | 24.117 | – | 19.85 | -44.81 | 5.5 |
| Yen et al. (2018) | 56.57 | 24.224 | 7.38 | 19.92 | -45.2 | – |
| Cantat-Gaudin et al. (2018) | 56.601 | 24.114 | 7.346 | 20.077 | -45.503 | – |
| Bica et al. (2019) | 56.743 | 24.124 | – | – | – | – |
| Soubiran et al. (2018) | 56.601 | 24.114 | – | – | – | 5.92 |
| Bossini et al. (2019) | 56.601 | 24.114 | – | – | – | – |
| Donor et al. (2020) | 56.505 | 24.37 | – | 20.35 | -44.59 | 6.1 |
| Cantat-Gaudin et al. (2020) | 56.601 | 24.114 | 7.346 | 20.077 | -45.503 | – |
| Dias et al. (2021) | 56.647 | 24.099 | 7.352 | 19.954 | -45.511 | 5.792 |
| Rain et al. (2021) | 56.601 | 24.114 | 7.346 | 20.077 | -45.503 | – |
| Jaehnig et al. (2021) | 56.557 | 24.086 | 7.368 | 20.03 | -45.452 | – |
| Tarricq et al. (2022) | 56.742 | 24.093 | 7.354 | 19.959 | -45.398 | – |
| He et al. (2022) | 56.606 | 24.145 | 7.365 | 19.995 | -45.434 | – |
| Just et al. (2023) | 56.497 | 24.369 | – | – | – | – |
| Qin et al. (2023) | 56.7 | 24.08 | 7.36 | 19.95 | -45.35 | 5.66 |
| Cordoni et al. (2023) | 56.647 | 24.099 | 7.352 | 19.954 | -45.511 | – |
| Hunt & Reffert (2023) | 56.68 | 24.108 | 7.378 | 19.955 | -45.457 | 5.343 |
| Cavallo et al. (2024) | 56.601 | 24.191 | 7.373 | – | – | – |
| Hunt & Reffert (2024) | 56.68 | 24.108 | 7.378 | 19.955 | -45.457 | 5.343 |
| Zhang et al. (2024) | 56.68 | 24.108 | – | – | – | – |
| Alfonso et al. (2024) | 56.608 | 24.102 | 7.322 | 19.92 | -45.402 | – |
| Almeida et al. (2025) | 56.647 | 24.099 | – | – | – | – |
| UCC | 56.6 | 24.114 | 7.361 | 19.904 | -45.35 | 5.491 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dambis (1999) | E_B-V_=0.04, DM0=5.47, log_age_=8.05 |
| Dias et al. (2002) | E(B-V)=0.03, Dist=133.0, Age=8.131, [Fe/H]=-0.03 |
| Chen et al. (2003) | E(B-V)=0.03, HDis=150, Age=0.13, [Fe/H]_1=-0.03 |
| Kharchenko et al. (2003) | E(B-V)=0.02, Dist=118 |
| Kharchenko et al. (2005) | E(B-V)=0.02, Dist=130, logt=8.08 |
| Piskunov et al. (2007) | E(B-V)=0.02, Dist=130, logt=8.08, logM=3.492 |
| Piskunov et al. (2008) | E(B-V)=0.02, Dist=130, logt=8.08, logM=3.54, logMA=2.672 |
| Kharchenko et al. (2012) | E(B-V)=0.021, d=130.0, logt=8.15, [Fe/H]=-0.03 |
| Kharchenko et al. (2013) | E(B-V)=0.021, d=130.0, logt=8.15, [Fe/H]=-0.036 |
| Kharchenko et al. (2016) | E(B-V)=0.021, d=130.0, logt=8.15 |
| Loktin & Popova (2017) | E(B-V)=0.03, Dist=147, logt=8.131 |
| Yen et al. (2018) | E(B-V)=0.01, d=126.3, logt=8.15 |
| Cantat-Gaudin et al. (2018) | dmode=135.6 |
| Soubiran et al. (2018) | dmode=135.6 |
| Bossini et al. (2019) | AV=0.14, Dist=5.667, logA=7.937, Fe/H=0.0 |
| Donor et al. (2020) | Fe/H=0.0 |
| Cantat-Gaudin et al. (2020) | AVNN=0.18, DistPc=128.0, AgeNN=7.89 |
| Dias et al. (2021) | Av=0.168, Dist=135, logage=8.116, [Fe/H]=0.032 |
| Rain et al. (2021) | E(B-V)=0.03, Dist=135.6, log(Age)=8.13, NBSS=0 |
| Jaehnig et al. (2021) | dmode=0.136 |
| Tarricq et al. (2022) | Dist=128, logAgeNN=7.9 |
| He et al. (2022) | A0=0.55, logAge=8.15 |
| Just et al. (2023) | logt=8.15, logmt=3.162 |
| Qin et al. (2023) | E(B-V)=0.08, m-M=5.83, logt=8.0 |
| Cordoni et al. (2023) | Av=0.168, Dist=5.652, logAge=8.116, [Fe/H]=0.032, mass-single=935.909, fbin-tot=0.148, fbss-MS=0.0 |
| Hunt & Reffert (2023) | AV50=0.102, diffAV50=0.634, MOD50=5.59, logAge50=8.085 |
| Cavallo et al. (2024) | AV50=0.67, dMod50=5.7, logAge50=7.94, [Fe/H]50=0.1 |
| Hunt & Reffert (2024) | MassJ=946.507, MassTot=984.547 |
| Zhang et al. (2024) | [Fe/H]ANN=-0.0002, [Fe/H]MCMC=-0.0253 |
| Alfonso et al. (2024) | AV=0.17473, MOD=5.55376, logAge=8.01487, Z=0.02866 |
| Almeida et al. (2025) | AV=0.168, Dist=135, logAge=8.116, MassRk=653.2 |
Search coordinates in Bayestar19