21P/Giacobini-Zinner
Basic Information of 21P/Giacobini-Zinner
Orbital Elements
| Parameter | Value |
|---|---|
| Orbit type | P |
| Perihelion distance (AU) | 1.008783 |
| Eccentricity | 0.711086 |
| Inclination (deg) | 32.051800 |
| Longitude of ascending node (deg) | 195.313600 |
| Argument of perihelion (deg) | 172.939900 |
| Epoch | 2025-11-21T00:00:00.000 |
| Reference | MPEC 2025-W75, MPC orbital elements |
| Period (years) | 6.524448 |
Latest Perihelion
| Field | Value |
|---|---|
| Date (UTC) | 2025-03-25T08:37:58.080 |
| Period (years) | 6.524448 |
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 | 10:00:20.06 | -17:59:59.4 | 2.880 | 25.11 | 148.4 | HIP 49042 | 10.21 |
| 2025-11-22 | 10:00:42.24 | -18:08:32.3 | 2.874 | 24.54 | 149.6 | HIP 49042 | 19.33 |
| 2025-11-23 | 10:01:03.15 | -18:17:00.5 | 2.869 | 23.99 | 151.0 | HIP 49120 | 16.78 |
| 2025-11-24 | 10:01:22.78 | -18:25:23.8 | 2.863 | 23.43 | 152.4 | HIP 49120 | 7.28 |
| 2025-11-25 | 10:01:41.13 | -18:33:41.9 | 2.858 | 22.89 | 153.8 | HIP 49120 | 2.62 |
| 2025-11-26 | 10:01:58.19 | -18:41:54.7 | 2.852 | 22.35 | 155.3 | HIP 49120 | 11.43 |
| 2025-11-27 | 10:02:13.96 | -18:50:02.1 | 2.846 | 21.82 | 156.9 | HIP 49120 | 20.31 |
| 2025-11-28 | 10:02:28.41 | -18:58:03.8 | 2.841 | 21.30 | 158.6 | HIP 49310 | 21.23 |
| 2025-11-29 | 10:02:41.55 | -19:05:59.7 | 2.835 | 20.79 | 160.4 | HIP 49310 | 21.76 |
| 2025-11-30 | 10:02:53.37 | -19:13:49.7 | 2.829 | 20.29 | 162.2 | HIP 49347 | 24.42 |
| 2025-12-01 | 10:03:03.86 | -19:21:33.4 | 2.823 | 19.81 | 164.2 | HIP 49347 | 19.62 |
| 2025-12-02 | 10:03:13.02 | -19:29:10.8 | 2.817 | 19.34 | 166.2 | HIP 49347 | 17.75 |
| 2025-12-03 | 10:03:20.83 | -19:36:41.7 | 2.812 | 18.90 | 168.4 | HIP 49177 | 18.77 |
| 2025-12-04 | 10:03:27.30 | -19:44:05.9 | 2.806 | 18.47 | 170.6 | HIP 49177 | 17.92 |
| 2025-12-05 | 10:03:32.41 | -19:51:23.2 | 2.800 | 18.06 | 173.0 | HIP 49177 | 19.76 |
| 2025-12-06 | 10:03:36.16 | -19:58:33.5 | 2.794 | 17.68 | 175.5 | HIP 49177 | 23.52 |
| 2025-12-07 | 10:03:38.55 | -20:05:36.4 | 2.788 | 17.68 | 175.5 | HIP 49209 | 24.52 |