Table 1
Observation geometries of comet E3.
| Date (UT) | DOY(a) (days) | R(b) (AU) | Δ(c) (AU) | α(d) (deg) | PsAng(e) (deg) | PsAMV(f) (deg) | v(𝑔) (deg) | δ(k) (deg) |
|---|---|---|---|---|---|---|---|---|
| 13 Jul. 2022 | 193 | 2.86 | 2.18 | 17.6 | 163.9 | 150.4 | 257.2 | −5.5 |
| 26 Jul. 2022 | 202 | 2.70 | 2.12 | 19.9 | 141.3 | 141.5 | 259.7 | −0.1 |
| 06 Aug. 2022 | 217 | 2.58 | 2.11 | 22.2 | 125.0 | 134.4 | 262.0 | 4.6 |
| 06 Sep. 2022 | 248 | 2.22 | 2.20 | 26.3 | 90.5 | 119.7 | 269.9 | 16.1 |
| 10 Oct. 2022 | 282 | 1.83 | 2.25 | 25.8 | 57.8 | 110.8 | 282.1 | 23.5 |
Notes. (a)Day of year, 2022/01/01 = 1. (b)Distance between comet E3 and the Sun. (c)Distance between comet E3 and the Earth. (d)Phase angle, Sun-E3-Earth. (e) Angle between the Sun-E3 direction and the north direction (measured counterclockwise). (f)Angle between the negative projected heliocentric velocity vector and the north direction (measured counterclockwise). (𝑔)True anomaly of comet E3. (h)Angle of the observer from the orbital plane of comet E3.
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