Table 1
Geometry and instrument settings of the observations of C/2020 T2 (Palomar).
| Telescope/instrument | Mode | Filter | Median UT | N | Exptime (sec) | X | mV (mag) | rH (au) | ∆ (au) | α (°) |
|---|---|---|---|---|---|---|---|---|---|---|
| Hale/WIRC+Pol | Spol | J | 04:58:34 | 32 | 960 | 1.18 (1.13–1.22) | ||||
| H | 04:58:55 | 32 | 960 | 1.17 (1.15–1.19) | 13.623 | 2.062 | 1.559 | 28.5 | ||
| Img | J | 05:25:08 | 4 | 120 | 1.24 (1.23–1.24) |
Notes. Top headers: modes, “Spol” and “Img” denote spectropolarimetric and imaging observations, respectively; N, number of exposures; Exptime, the total on-source time in seconds (=N × 30 s); X, average airmass with its range in the bracket; mV, apparent total V-band magnitude provided by the JPL Horizons (http://ssd.jpl.nasa.gov/?horizons); rH and ∆, heliocentric and geocentric distances in au, respectively; a, phase angle (angle of Sun-comet-observer) in degrees.
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.