PTB 9
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UTI:
UCC Trust Index
PTB 9 is a somewhat close, very rich, very dense object of very high C3 quality. It is moderately studied in the literature. Warning: This is very likely a duplicate object, which shares a large percentage of members with at least one previously reported entry. |
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| C3 | N_50 |
r_50 |
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|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AA | 801 | 11.1 | ||||||||||||
Positions
| Reference | RA | DEC | Plx | pmRA | pmDE | Rv |
|---|---|---|---|---|---|---|
| Kharchenko et al. (2012) | 357.502 | 68.033 | – | -2.8 | 0.04 | – |
| Hunt & Reffert (2023) | 357.495 | 68.031 | 1.033 | 1.482 | 3.963 | -44.265 |
| Cavallo et al. (2024) | 357.449 | 68.04 | 1.033 | – | – | – |
| Hunt & Reffert (2024) | 357.495 | 68.031 | 1.033 | 1.482 | 3.963 | -44.265 |
| Hu & Soubiran (2025) | 357.449 | 68.04 | – | – | – | – |
| UCC | 357.454 | 68.038 | 1.032 | 1.484 | 3.979 | -44.717 |
Estimated members
Explore data in Colab
Fundamental parameters
| Reference | Values |
|---|---|
| Kharchenko et al. (2012) | e_bv=0.7, distance=850, log_age=9.07 |
| Hunt & Reffert (2023) | AV50=2.55, diffAV50=1.045, MOD50=9.832, logAge50=8.94 |
| Cavallo et al. (2024) | AV50=2.89, dMod50=10.08, logAge50=8.91, [Fe/H]50=-0.03 |
| Hunt & Reffert (2024) | MassJ=2676.00 |
| Hu & Soubiran (2025) | MA22=0.15, MA23f=-0.13, MA23g=-0.02, MZ23=0.17, MK24=-0.12, MF24=-0.11 |
Search coordinates in Bayestar19
Cluster region
Objects with shared members
| Cluster | % | RA | DEC | Plx | pmRA | pmDE | Rv | UTI |
|---|---|---|---|---|---|---|---|---|
| Melotte 244 | 98.1 | 357.45 | 68.04 | 1.03 | 1.48 | 3.98 | -44.73 | 1.0 |