Table 1.
Adopted parameters for the light curve fit and results.
| Adopted parameters and physical constant | |
|---|---|
| Pluto’s geocentric distance | 4.91063 × 109 km |
| Pluto’s shadow velocity at 12h 42m on 2019 July 17 | 24.18 km s−1 (geocentric), 24.51 km s−1 (Haleakala sta. (a)) |
| Pluto’s mass and radius (b) | GM = 8.696 × 1011 m3 s−2, RP = 1187 km |
| N2 molecular mass | μ = 4.652 × 10−26 kg |
| N2 molecular refractivity (c) | K = 1.091 × 10−23 |
| Boltzmann constant | kB = 1.380626 × 10−23 J K−1 |
| Results | |
| Pressure | |
| Pressure at 1215 km, p1215 |
 |
| Surface pressure, psurf |
 |
| Astrometry | |
| Closest approach to Pluto’s shadow center |
 km |
| Time of closest approach to shadow center (UT) (d) | 12h 41m 52.02 ± 0.18 s on 2019 July 17 |
Notes.
(b)
Stern et al. (2015), where G is the constant of gravitation.
(d)
A possible systematic bias is several seconds (see Sect. 3.1).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.