Melotte 166
(Collinder 325; VDBH 218; NGC 6318; MWSC 2552; OCL 1004; vdBergh-Hagen 218; ESO 333 01)
Summary
Melotte 166 is a rich, very dense object of very high C3 quality. It is located at a moderate distance from the Sun, near the mid-plane. It is well-studied in the literature.
This object shares a very small percentage of members with 2 later reported entries.
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 259.046 | -39.425 | – | -0.87 | -0.47 | – |
| Kharchenko et al. (2013) | 259.045 | -39.417 | – | 2.52 | 0.42 | – |
| Kharchenko et al. (2016) | 259.036 | -39.417 | – | – | – | – |
| Cantat-Gaudin et al. (2018) | 259.044 | -39.424 | 0.41 | -0.74 | -2.451 | – |
| Bica et al. (2019) | 259.046 | -39.428 | – | – | – | – |
| Cantat-Gaudin et al. (2020) | 259.044 | -39.424 | 0.41 | -0.74 | -2.451 | – |
| Dias et al. (2021) | 259.042 | -39.424 | 0.409 | -0.754 | -2.457 | – |
| Just et al. (2023) | 259.036 | -39.417 | – | – | – | – |
| Hunt & Reffert (2023) | 259.048 | -39.428 | 0.408 | -0.764 | -2.465 | 11.417 |
| Cavallo et al. (2024) | 259.046 | -39.427 | 0.409 | – | – | – |
| Celli et al. (2024) | 259.044 | -39.424 | – | – | – | – |
| Hunt & Reffert (2024) | 259.048 | -39.428 | 0.408 | -0.764 | -2.465 | 11.417 |
| Almeida et al. (2025) | 259.042 | -39.424 | – | – | – | – |
| UCC | 259.048 | -39.428 | 0.419 | -0.753 | -2.468 | 3.534 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=1.2, Dist=2100.0, Age=8.2 |
| Kharchenko et al. (2013) | E(B-V)=1.166, d=1841.0, logt=7.8 |
| Kharchenko et al. (2016) | E(B-V)=1.166, d=1841.0, logt=7.8 |
| Cantat-Gaudin et al. (2018) | dmode=2277.6 |
| Cantat-Gaudin et al. (2020) | AVNN=3.46, DistPc=2213.0, AgeNN=6.99 |
| Dias et al. (2021) | Av=3.542, Dist=2219, logage=6.864, [Fe/H]=0.016 |
| Just et al. (2023) | logt=7.8, logmt=2.268 |
| Hunt & Reffert (2023) | AV50=4.252, diffAV50=2.828, MOD50=11.726, logAge50=7.17 |
| Cavallo et al. (2024) | AV50=4.23, dMod50=11.8, logAge50=7.0, [Fe/H]50=-0.25 |
| Celli et al. (2024) | Age=9.8, Mc=2205.2 |
| Hunt & Reffert (2024) | MassJ=6334.36, MassTot=6334.36 |
| Almeida et al. (2025) | AV=3.542, Dist=2219, logAge=6.864, MassRk=1684.0 |
Search coordinates in Bayestar19
Cluster region map
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| OC 0679 | 8.6 | 259.06 | -39.42 | 0.46 | -0.85 | -2.5 | -35.87 | 0.04 |
| CWWDL 13632 | 0.7 | 258.65 | -39.51 | 0.45 | -0.92 | -2.59 | – | 0.06 |