Table 2
Astrometric detections of HIP 99770 b.
| MJD (days) | Instrument | ΔRA (mas) | ΔDec (mas) | ρ |
|---|---|---|---|---|
| 59059 | CHARIS | (263 ± 4) | (−367 ± 5) | − |
| 59093 | CHARIS | (263 ± 5) | (−366 ± 5) | − |
| 59353 | CHARIS | (280 ± 4) | (−343 ± 4) | − |
| 59368 | NIRC2 | (286 ± 6) | (−337 ± 6) | − |
| 59408 | CHARIS | (286 ± 4) | (−338 ± 4) | − |
| 59504 | CHARIS | (292 ± 4) | (−327 ± 4) | − |
| 60095.40 | GRAVITY | (322.27 ± 0.10) | (−265.09 ± 0.18) | −0.88 |
| 60127.31* | GRAVITY | (322.21 ± 0.36) | (−260.66 ± 0.49) | −0.88 |
Notes. The astrometric position of the companion relative to the host star at each epoch is presented as separation components along the right ascension axis, ΔRA, and the declination axis, ΔDec. The CHARIS and NIRC2 epochs were originally published by Currie et al. (2023). For these, the time of observation is rounded to the nearest full day. The GRAVITY data we present also comprise a correlation coefficient, ρ, between ΔRA and ΔDec. * Since this astrometric epoch is corrupted, it was not used anywhere in this study.
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