Table 1
Observing geometries of A3.
| Date (UT) | DOY (a) (days) | R (b) (au) | Δ (c) (au) | α (d) (deg) | PsAng (e) (deg) | PsAMV (f) (deg) | ν (g) (deg) | δ (h) (deg) |
|---|---|---|---|---|---|---|---|---|
| 23 Feb. 2024 | 54 | 3.63 | 3.23 | 15.1 | 283.0 | 17.1 | 218.3 | 8.6 |
| 23 Mar. 2024 | 83 | 3.27 | 2.44 | 11.1 | 275.6 | 43.5 | 220.5 | 5.0 |
| 13 Apr. 2024 | 104 | 3.00 | 2.02 | 3.9 | 241.9 | 71.5 | 222.3 | −0.5 |
| 8 May 2024 | 129 | 2.67 | 1.77 | 12.1 | 122.3 | 87.2 | 225.0 | −9.4 |
| 30 May 2024 | 151 | 2.36 | 1.79 | 23.5 | 114.6 | 91.0 | 228.1 | 15.8 |
Notes. (a)Day of the year, with 1 January 2024, as day 1. (b)Heliocentric distance of A3. (c)Geocentric distance of A3. (d)Phase angle, Sun-A3-Earth. (e)Position angle of the Sun-A3 direction. (f)Position angle of the vector opposite to the projected heliocentric velocity. (g)True anomaly of A3. (h)Angle between the observer’s viewing direction and A3’s orbital plane.
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