Melotte 40
(Collinder 81; NGC 2158; FSR 0872; OCL 468; MWSC 733; FoF 367)
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UTI:
UCC Trust Index
Melotte 40 is a very rich, very dense object of very high C3 quality. It is very well-studied in the literature. This object shares a very small percentage of members with a later reported entry. |
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| C3 | N_50 |
r_50 |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | 2029 | 2.4 | ||||||||||||
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 91.854 | 24.097 | – | -1.22 | -3.3 | 26.9 |
| Chen et al. (2003) | 91.857 | 24.091 | – | – | – | – |
| Glushkova et al. (2010) | 91.866 | 24.098 | – | – | – | – |
| Kharchenko et al. (2012) | 91.857 | 24.092 | – | -0.29 | -2.48 | – |
| Loktin & Popova (2017) | 91.86 | 24.098 | – | 0.002 | -0.849 | 28.0 |
| Bica et al. (2019) | 91.857 | 24.091 | – | – | – | – |
| Liu & Pang (2019) | 91.862 | 24.104 | 0.281 | -0.096 | -1.943 | – |
| Cantat-Gaudin et al. (2020) | 91.862 | 24.099 | 0.192 | -0.177 | -2.002 | – |
| Donor et al. (2020) | 91.857 | 24.092 | – | -0.24 | -2.0 | 27.7 |
| Jaehnig et al. (2021) | 91.862 | 24.099 | 0.205 | -0.2 | -2.004 | – |
| Hunt & Reffert (2023) | 91.859 | 24.098 | 0.233 | -0.211 | -1.982 | 26.962 |
| Cavallo et al. (2024) | 91.862 | 24.099 | 0.233 | – | – | – |
| Hunt & Reffert (2024) | 91.859 | 24.098 | 0.233 | -0.211 | -1.982 | 26.962 |
| Hu & Soubiran (2025) | 91.862 | 24.099 | – | – | – | – |
| UCC | 91.862 | 24.098 | 0.23 | -0.198 | -1.982 | 26.473 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.36, Dist=5071.0, Age=9.023, [Fe/H]=-0.28 |
| Chen et al. (2003) | E(B-V)=0.55, HDis=3600, Age=2.0, [Fe/H]_1=-0.23 |
| Glushkova et al. (2010) | E(B-V)=0.34, Dm=12.58, Age=9.3 |
| Kharchenko et al. (2012) | e_bv=0.333, distance=4770, log_age=9.33, metallicity=-0.25 |
| Loktin & Popova (2017) | E(B-V)=0.368, Dmod=13.545, logt=9.044 |
| Liu & Pang (2019) | Age=1.2, Z=0.5 |
| Cantat-Gaudin et al. (2020) | AVNN=1.44, DMNN=13.17, AgeNN=9.19 |
| Donor et al. (2020) | Fe/H=-0.21 |
| Hunt & Reffert (2023) | AV50=1.371, diffAV50=1.181, MOD50=12.9, logAge50=9.269 |
| Cavallo et al. (2024) | AV50=1.37, dMod50=12.62, logAge50=9.4, [Fe/H]50=-0.01 |
| Hunt & Reffert (2024) | MassJ=20923.0 |
| Hu & Soubiran (2025) | MA22=-0.24, MA23f=-0.47, MA23g=-0.32, MZ23=-0.52, MK24=-0.31, MF24=-0.4 |
Search coordinates in Bayestar19
Cluster region
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| OC 0306 | 1.2 | 91.87 | 24.1 | 0.36 | -0.2 | -2.02 | – | 0.0 |