C/2021 U4 (Leonard)
Basic Information of C/2021 U4 (Leonard)
Orbital Elements
| Parameter | Value |
|---|---|
| Orbit type | C |
| Perihelion distance (AU) | 1.787427 |
| Eccentricity | 0.960189 |
| Inclination (deg) | 152.877700 |
| Longitude of ascending node (deg) | 241.805100 |
| Argument of perihelion (deg) | 237.279600 |
| Epoch | 2022-01-21T00:00:00.000 |
| Reference | , MPC orbital elements |
| Period (years) | 300.841566 |
Latest Perihelion
| Field | Value |
|---|---|
| Date (UTC) | 2021-12-21T22:38:21.120 |
| Period (years) | 300.841566 |
Magnitude
Magnitude Chart Placeholder
Ephemeris
| Date (UTC) | RA (J2000) | Dec (J2000) | Δ (AU) | Motion (arcsec/hr) | Dir (deg) | Nearest HIP | Dist (arcmin) |
|---|---|---|---|---|---|---|---|
| 2025-11-21 | 15:14:36.82 | -11:39:41.7 | 12.935 | 9.79 | 99.1 | HIP 74659 | 17.30 |
| 2025-11-22 | 15:14:52.60 | -11:40:19.0 | 12.938 | 9.75 | 99.0 | HIP 74659 | 15.53 |
| 2025-11-23 | 15:15:08.34 | -11:40:55.5 | 12.941 | 9.71 | 98.8 | HIP 74659 | 14.62 |
| 2025-11-24 | 15:15:24.02 | -11:41:31.2 | 12.943 | 9.67 | 98.7 | HIP 74659 | 14.70 |
| 2025-11-25 | 15:15:39.63 | -11:42:06.1 | 12.945 | 9.62 | 98.5 | HIP 74659 | 15.76 |
| 2025-11-26 | 15:15:55.18 | -11:42:40.2 | 12.947 | 9.57 | 98.3 | HIP 74659 | 17.60 |
| 2025-11-27 | 15:16:10.66 | -11:43:13.4 | 12.948 | 9.52 | 98.1 | HIP 74659 | 20.00 |
| 2025-11-28 | 15:16:26.06 | -11:43:45.7 | 12.949 | 9.47 | 98.0 | HIP 74659 | 22.77 |
| 2025-11-29 | 15:16:41.38 | -11:44:17.1 | 12.950 | 9.41 | 97.8 | HIP 74659 | 25.78 |
| 2025-11-30 | 15:16:56.61 | -11:44:47.6 | 12.951 | 9.35 | 97.6 | HIP 74659 | 28.95 |
| 2025-12-01 | 15:17:11.76 | -11:45:17.2 | 12.951 | 9.29 | 97.4 | HIP 74659 | 32.22 |
| 2025-12-02 | 15:17:26.81 | -11:45:45.9 | 12.951 | 9.22 | 97.2 | HIP 74659 | 35.55 |
| 2025-12-03 | 15:17:41.77 | -11:46:13.6 | 12.951 | 9.16 | 97.0 | HIP 74659 | 38.93 |
| 2025-12-04 | 15:17:56.62 | -11:46:40.3 | 12.951 | 9.09 | 96.8 | HIP 74659 | 42.33 |
| 2025-12-05 | 15:18:11.37 | -11:47:06.1 | 12.950 | 9.01 | 96.6 | HIP 75064 | 40.15 |
| 2025-12-06 | 15:18:26.00 | -11:47:30.9 | 12.949 | 8.94 | 96.4 | HIP 75064 | 37.10 |
| 2025-12-07 | 15:18:40.53 | -11:47:54.7 | 12.947 | 8.94 | 96.4 | HIP 75064 | 34.18 |