C/2021 A4 (NEOWISE)
Basic Information of C/2021 A4 (NEOWISE)
Orbital Elements
| Parameter | Value |
|---|---|
| Orbit type | C |
| Perihelion distance (AU) | 1.146144 |
| Eccentricity | 0.973319 |
| Inclination (deg) | 111.561400 |
| Longitude of ascending node (deg) | 307.094000 |
| Argument of perihelion (deg) | 204.691400 |
| Epoch | 2022-01-21T00:00:00.000 |
| Reference | , MPC orbital elements |
| Period (years) | 281.550060 |
Latest Perihelion
| Field | Value |
|---|---|
| Date (UTC) | 2021-03-20T00:29:48.480 |
| Period (years) | 281.550060 |
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 | 20:36:52.18 | -23:57:20.3 | 14.414 | 4.49 | 50.7 | HIP 101823 | 23.32 |
| 2025-11-22 | 20:36:58.27 | -23:56:12.0 | 14.435 | 4.63 | 51.7 | HIP 101823 | 23.20 |
| 2025-11-23 | 20:37:04.63 | -23:55:03.2 | 14.457 | 4.76 | 52.5 | HIP 101823 | 23.19 |
| 2025-11-24 | 20:37:11.24 | -23:53:53.6 | 14.478 | 4.89 | 53.3 | HIP 101823 | 23.31 |
| 2025-11-25 | 20:37:18.10 | -23:52:43.5 | 14.499 | 5.03 | 54.1 | HIP 101823 | 23.56 |
| 2025-11-26 | 20:37:25.22 | -23:51:32.7 | 14.520 | 5.16 | 54.8 | HIP 101823 | 23.96 |
| 2025-11-27 | 20:37:32.59 | -23:50:21.3 | 14.541 | 5.29 | 55.4 | HIP 101823 | 24.51 |
| 2025-11-28 | 20:37:40.21 | -23:49:09.3 | 14.561 | 5.41 | 56.1 | HIP 101823 | 25.21 |
| 2025-11-29 | 20:37:48.06 | -23:47:56.8 | 14.582 | 5.54 | 56.7 | HIP 101823 | 26.07 |
| 2025-11-30 | 20:37:56.16 | -23:46:43.7 | 14.602 | 5.67 | 57.2 | HIP 101823 | 27.08 |
| 2025-12-01 | 20:38:04.48 | -23:45:30.0 | 14.623 | 5.79 | 57.7 | HIP 101823 | 28.23 |
| 2025-12-02 | 20:38:13.04 | -23:44:15.9 | 14.643 | 5.91 | 58.2 | HIP 101997 | 27.18 |
| 2025-12-03 | 20:38:21.82 | -23:43:01.2 | 14.663 | 6.03 | 58.7 | HIP 101997 | 25.32 |
| 2025-12-04 | 20:38:30.83 | -23:41:45.9 | 14.682 | 6.15 | 59.2 | HIP 101997 | 23.51 |
| 2025-12-05 | 20:38:40.06 | -23:40:30.2 | 14.702 | 6.27 | 59.6 | HIP 101997 | 21.76 |
| 2025-12-06 | 20:38:49.50 | -23:39:14.1 | 14.721 | 6.38 | 60.0 | HIP 101997 | 20.11 |
| 2025-12-07 | 20:38:59.15 | -23:37:57.4 | 14.740 | 6.38 | 60.0 | HIP 101997 | 18.62 |