Table 2.
Important parameters for the astrometric microlensing events reported here.
| Luyten 143-23 (2018) | Luyten 143-23 (2021) | Ross 322 (2018) | |
|---|---|---|---|
| Sou_ID | 5254061535052907008 | 5254061535097574016 | 314922601464808064 |
| Sou_RA | 161.08462829° | 161.08436459° | 16.95791867° |
| Sou_Dec | −61.20147495° | −61.20032468° | +34.21100433° |
| Sou_σRA | 0.16 mas | 0.06 mas | 0.27 mas |
| Sou_σDec | 0.16 mas | 0.06 mas | 0.38 mas |
| Sou_µRA | −4.85 mas yr− | −5.20 mas yr− | −1.12 mas yr− |
| Sou_µDec | 2.82 mas yr−1 | 2.17 mas yr−1 | 0.83 mas yr−1 |
| Sou_σµRA | 0.38 mas yr−1 | 0.13 mas yr−1 | 0.60 mas yr−1 |
| σµDec | 0.33 mas yr−1 | 0.12 mas yr−1 | 0.62 mas yr−1 |
| Sou_ϖ | 0.09 mas | 0.07 mas | −0.05 mas |
| Sou_σϖ | 0.19 mas | 0.07 mas | 0.44 mas |
| Sou_G | 18.5 mag | 17.0 mag | 18.6 mag |
| Sou_GRP | 16.9 mag | 15.9 mag | 17.6 mag |
| Sou_GBP | 19.1 mag | 18.0 mag | 18.6 mag |
| θE | 14.0 mas | 14.0 mas | 9.8 mas |
| σ θE | 0.7 mas | 0.7 mas | 0.5 mas |
| Tmin (TCB) | J2018.51236 yr | J2021.18674 yr | J2018.5995 yr |
| σTmin | 0.00051 yr | 0.00063 yr | 0.0022 yr |
| Dmin | 108.5 mas | 280.1 mas | 125.3 mas |
| σDmin | 1.4 mas | 1.1 mas | 3.4 mas |
| Δθmax | 1.74 mas | 0.69 mas | 0.76 mas |
| σΔθmax | 0.12 mas | 0.05 mas | 0.06 mas |
Notes. The table lists source ID (Sou_ID), J2015.5 position (Sou_RA, Sou_Dec), proper motion (Sou_µ) parallax(Sou_ϖ), and G magnitude (Sou_G, Sou_GRP, Sou_GBP) for the background stars. Furthermore, the angular Einstein radii (θE), epoch and distance of closest approach (Tmin, Dmin), and the maximum expected shifts (Δθmax) are shown. Further information for the background stars can be extracted from Gaia DR2 using the Source ID.
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