Table 1
Observational geometry and instrument settings.
| Telescope/ Instrument | Median UT (2020 Sep. 19) | Object | N | Exptime (s) | X | mV (mag) | rH (au) | Δ (au) | α (°) | Standard star |
|---|---|---|---|---|---|---|---|---|---|---|
| Subaru/IRCS | 11:59:02 | (96) Aegle | 4 | 1 920 | 1.12 (1.02−1.21) | 12.862 | 3.460 | 2.490 | 5.10 | HD 12846 |
| 13:50:58 | (570) Kythera | 5 | 2 400 | 1.13 (1.04−1.22) | 13.436 | 3.016 | 2.112 | 9.97 | HD 377 |
Notes. Top row: N, number of one dither set of exposures; Exptime, the total integration time in seconds, which is a product of the exposure time per frame (EXP1TIME in the FITS header), the number of nondestructive reads (NDR), and the number of the exposure at each slit position (COADD) by the total number of the asteroid spectra combined in each set (4N); X, mean airmass with the range in airmass in brackets; mV, apparent V-band magnitude provided by the NASA/JPL Horizons system (http://ssd.jpl.nasa.gov/?horizons); rH and Δ, median heliocentric and geocentric distances in au, respectively; α, median phase angle (angle of Sun–comet–observer) in degrees.
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