Melotte 69
(Collinder 154; NGC 2420; OCL 488; MWSC 1292; FoF 642)
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UTI:
UCC Trust Index
Melotte 69 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 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | 1207 | 5.8 | ||||||||||||
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 114.596 | 21.573 | – | -1.76 | -2.38 | 73.57 |
| Chen et al. (2003) | 114.593 | 21.569 | – | – | – | – |
| Kharchenko et al. (2012) | 114.596 | 21.567 | – | -2.56 | -3.83 | – |
| Loktin & Popova (2017) | 114.6 | 21.573 | – | -2.547 | -3.982 | 67.0 |
| Bica et al. (2019) | 114.603 | 21.573 | – | – | – | – |
| Bossini et al. (2019) | 114.602 | 21.575 | – | – | – | – |
| Liu & Pang (2019) | 114.607 | 21.579 | 0.366 | -1.181 | -2.129 | – |
| Cantat-Gaudin et al. (2020) | 114.602 | 21.575 | 0.363 | -1.19 | -2.125 | – |
| Donor et al. (2020) | 114.596 | 21.567 | – | -1.14 | -2.11 | 74.4 |
| Dias et al. (2021) | 114.605 | 21.572 | 0.363 | -1.202 | -2.124 | 74.291 |
| Jaehnig et al. (2021) | 114.603 | 21.576 | 0.391 | -1.192 | -2.118 | – |
| Hunt & Reffert (2023) | 114.602 | 21.574 | 0.39 | -1.215 | -2.039 | 72.165 |
| Cavallo et al. (2024) | 114.606 | 21.576 | 0.391 | – | – | – |
| Hunt & Reffert (2024) | 114.602 | 21.574 | 0.39 | -1.215 | -2.039 | 72.165 |
| Hu & Soubiran (2025) | 114.606 | 21.576 | – | – | – | – |
| UCC | 114.603 | 21.577 | 0.383 | -1.211 | -2.044 | 73.593 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.04, Dist=2480.0, Age=9.3, [Fe/H]=-0.38 |
| Chen et al. (2003) | E(B-V)=0.029, HDis=3085, Age=1.11, [Fe/H]_1=-0.26 |
| Kharchenko et al. (2012) | e_bv=0.01, distance=2880, log_age=9.365, metallicity=-0.38 |
| Loktin & Popova (2017) | E(B-V)=0.031, Dmod=12.471, logt=9.052 |
| Bossini et al. (2019) | AV=0.187, Dist=12.049, logA=9.271, Fe/H=-0.05 |
| Liu & Pang (2019) | Age=2.51, Z=-0.5 |
| Cantat-Gaudin et al. (2020) | AVNN=0.04, DMNN=12.06, AgeNN=9.24 |
| Donor et al. (2020) | Fe/H=-0.19 |
| Dias et al. (2021) | Av=0.117, Dist=2435, logage=9.347, [Fe/H]=-0.1 |
| Hunt & Reffert (2023) | AV50=0.03, diffAV50=0.133, MOD50=11.787, logAge50=9.352 |
| Cavallo et al. (2024) | AV50=0.1, dMod50=11.83, logAge50=9.35, [Fe/H]50=-0.02 |
| Hunt & Reffert (2024) | MassJ=3480.16 |
| Hu & Soubiran (2025) | MA22=-0.3, MA23f=-0.33, MA23g=-0.2, MZ23=-0.24, MK24=-0.26, MF24=-0.23 |
Search coordinates in Bayestar19
Cluster region
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| Theia 6042 | 2.1 | 114.62 | 21.57 | 0.47 | -1.13 | -2.07 | 72.68 | 0.0 |