Melotte 81
(Collinder 171; NGC 2509; ESO 561 07; FSR 1282; OCL 630; MWSC 1410; FoF 588)
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UTI:
UCC Trust Index
Melotte 81 is a rich, very dense object of very high C3 quality. It is very well-studied in the literature. |
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| C3 | N_50 |
r_50 |
||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | 442 | 4.9 | ||||||||||||
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Dias et al. (2002) | 120.2 | -19.052 | – | -2.64 | 1.81 | – |
| Kharchenko et al. (2012) | 120.195 | -19.05 | – | -3.82 | 4.24 | – |
| Loktin & Popova (2017) | 120.195 | -19.05 | – | -6.133 | 2.19 | – |
| Bica et al. (2019) | 120.193 | -19.056 | – | – | – | – |
| Liu & Pang (2019) | 120.198 | -19.056 | 0.369 | -2.712 | 0.771 | – |
| Cantat-Gaudin et al. (2020) | 120.201 | -19.056 | 0.363 | -2.708 | 0.764 | – |
| Dias et al. (2021) | 120.2 | -19.058 | 0.364 | -2.708 | 0.766 | 61.087 |
| Hunt & Reffert (2023) | 120.201 | -19.058 | 0.373 | -2.72 | 0.804 | 58.708 |
| Cavallo et al. (2024) | 120.201 | -19.058 | 0.374 | – | – | – |
| Hunt & Reffert (2024) | 120.201 | -19.058 | 0.373 | -2.72 | 0.804 | 58.708 |
| Hu & Soubiran (2025) | 120.201 | -19.058 | – | – | – | – |
| UCC | 120.202 | -19.057 | 0.371 | -2.72 | 0.798 | 60.613 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Dias et al. (2002) | E(B-V)=0.15, Dist=912.0, Age=9.9 |
| Kharchenko et al. (2012) | e_bv=0.104, distance=1711, log_age=9.2 |
| Loktin & Popova (2017) | E(B-V)=0.044, Dmod=12.556, logt=9.11 |
| Liu & Pang (2019) | Age=2.29, Z=-0.5 |
| Cantat-Gaudin et al. (2020) | AVNN=0.23, DMNN=11.99, AgeNN=9.18 |
| Dias et al. (2021) | Av=0.326, Dist=2411, logage=9.18, [Fe/H]=0.082 |
| Hunt & Reffert (2023) | AV50=0.118, diffAV50=0.163, MOD50=11.919, logAge50=9.216 |
| Cavallo et al. (2024) | AV50=0.61, dMod50=11.69, logAge50=9.17, [Fe/H]50=-0.23 |
| Hunt & Reffert (2024) | MassJ=2168.51 |
| Hu & Soubiran (2025) | MA22=-0.1, MA23f=-0.12, MA23g=0.09, MZ23=0.01, MK24=-0.1, MF24=-0.05 |
Search coordinates in Bayestar19