Table 1.
More details about the occulted star and Quaoar.
| Occulted star | |
| Epoch | 2022-08-09 06:34:04 UTC |
| Source ID | Gaia DR3 4098214367441486592 |
| Star position | α⋆ = 18h21m42 86965 ± 0.2404 mas |
| at epoch (1) |  mas |
| Magnitudes (2) | G = 15.3; RP = 14.1; BP = 16.8; |
| J = 12.0; H = 11.0; K = 10.7 | |
| Apparent diameter (3) | 0.44 mas/1.33 km |
| RUWE (4) | 0.959 |
| (50000) Quaoar | |
| Ephemeris version | NIMAv16 (5) |
| Geocentric distance | 41.983157 au |
| Apparent magnitude | V = 18.8 |
| Mass (6) | (1.2 ± 0.05) × 1021 kg |
| Rotation period (7) | 17.6788 ± 0.0004 h |
| Weywot’s orbital pole (6) | |
| RA | 17h44m ± 40m |
| Dec | +50° ± 6° |
Notes.The star position was taken from the Gaia Data Release 3 (GDR3) star catalog (Gaia Collaboration 2023) and is propagated to the event epoch using the formalism of Butkevich & Lindegren (2014) applied with SORA (Gomes-Júnior et al. 2022).
J, H, and K from the NOMAD catalog (Zacharias et al. 2004).
Limb-darkened angular diameter estimated using a fit of the spectral energy distribution of the star with Castelli & Kurucz (2003) atmosphere models, with the reddening definition of Fitzpatrick (1999).
Renormalized unit weight error (Lindegren et al. 2021).
Obtained from the Numerical Integration of the Motion of an Asteroid (NIMA, Desmars et al. 2015), based on astrometric positions derived from previous stellar occultations and the Minor Planet Center (MPC) database, available at https://lesia.obspm.fr/lucky-star/obj.php?p=958
Obtained from the method of Vachier et al. (2012).
Assuming the double-peaked light curve from Ortiz et al. (2003).
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