Table 1.
Discontinuity events observed during February–July 2022.
| Date/time (UT) | Clouds (a) | Wavelength (b) | Observer |
|---|---|---|---|
| 2022-02-04 16:55 | Lower | 2.26 μm | IRTF/SpeX |
| 2022-05-05 04:36 | Middle | > 742 nm | C. Foster |
| 06:13 | Middle | 820–920 nm | A. Cidadão |
| 2022-05-15 04:29 | Middle | > 742 nm | C. Foster |
| 08:16 | Middle | 820–920 nm | A. Cidadão |
| 2022-05-25 04:41 | Middle | > 742 nm | C. Foster |
| 07:58 | Middle | 820–920 nm | A. Cidadão |
| 2022-05-30 05:14 | Middle | > 742 nm | C. Foster |
| 09:06 | Middle | > 685 nm | L. S. Viola |
| 2022-06-04 05:09 | Middle | 820–920 nm | L. Morrone |
| 09:52 | Middle | 820–920 nm | A. Cidadão |
| 2022-06-13 14:05 | Upper | 345–380 nm | VCO (c)/UVI |
| 2022-06-14 23:05 | |||
| 2022-06-14 05:16 | Middle | 820–920 nm | L. Morrone |
| 2022-06-19 05:52 | Middle | 820–920 nm | L. Morrone |
| 06:48 | Middle | 820–920 nm | A. Cidadão |
| 2022-06-24 05:46 | Middle | 820–920 nm | L. Morrone |
| 07:36 | Middle | 820–920 nm | A. Cidadão |
| 2022-07-09 06:33 | Middle | 820–920 nm | A. Cidadão |
| 2022-07-13 10:33 | Middle | 820–920 nm | A. Cidadão |
| 2022-07-18 11:57 | Middle | 820–920 nm | A. Cidadão |
| 2022-07-23 06:27 | Middle | 820–920 nm | L. Morrone |
| 07:54 | Middle | 820–920 nm | A. Cidadão |
| 2022-07-28 09:21 | Middle | 820–920 nm | A. Cidadão |
Notes.
Approximate level sensed: dayside upper clouds (56.5–70 km above the surface), dayside middle clouds (50.5–56.5 km), and nightside lower clouds (47.5–50.5 km).
Filters used: contK (2.22–2.32 μm), Astronomik ProPlanet 742 IR-pass filter (> 742 nm), Baader SLOAN/SDSS z′−s′ (820–920 nm), Baader IR-Pass Filter (> 685 nm), and VCO/UVI 365 nm (345–380 nm).
Venus Climate Orbiter: Previous name of Akatsuki (Nakamura et al. 2007).
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