161P/Hartley-IRAS
Basic Information of 161P/Hartley-IRAS
Orbital Elements
| Parameter | Value |
|---|---|
| Orbit type | P |
| Perihelion distance (AU) | 1.265044 |
| Eccentricity | 0.836098 |
| Inclination (deg) | 95.787900 |
| Longitude of ascending node (deg) | 1.481800 |
| Argument of perihelion (deg) | 47.078500 |
| Epoch | 2025-11-21T00:00:00.000 |
| Reference | MPEC 2025-W75, MPC orbital elements |
| Period (years) | 21.442828 |
Latest Perihelion
| Field | Value |
|---|---|
| Date (UTC) | 2026-11-27T12:40:27.840 |
| Period (years) | 21.442828 |
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 | 04:31:21.74 | -70:52:08.3 | 4.147 | 46.76 | 263.4 | HIP 21211 | 8.08 |
| 2025-11-22 | 04:27:34.59 | -70:54:08.8 | 4.142 | 46.92 | 265.0 | HIP 20662 | 24.96 |
| 2025-11-23 | 04:23:45.68 | -70:55:37.1 | 4.136 | 47.09 | 266.7 | HIP 20662 | 23.48 |
| 2025-11-24 | 04:19:55.32 | -70:56:33.0 | 4.130 | 47.24 | 268.4 | HIP 19791 | 28.74 |
| 2025-11-25 | 04:16:03.83 | -70:56:56.1 | 4.125 | 47.39 | 270.0 | HIP 19791 | 13.64 |
| 2025-11-26 | 04:12:11.54 | -70:56:46.2 | 4.120 | 47.54 | 271.7 | HIP 19791 | 15.99 |
| 2025-11-27 | 04:08:18.77 | -70:56:02.9 | 4.115 | 47.68 | 273.4 | HIP 19479 | 26.47 |
| 2025-11-28 | 04:04:25.86 | -70:54:46.1 | 4.109 | 47.82 | 275.1 | HIP 18729 | 23.63 |
| 2025-11-29 | 04:00:33.13 | -70:52:55.8 | 4.104 | 47.96 | 276.7 | HIP 18729 | 17.10 |
| 2025-11-30 | 03:56:40.91 | -70:50:32.0 | 4.100 | 48.09 | 278.4 | HIP 18729 | 27.74 |
| 2025-12-01 | 03:52:49.53 | -70:47:34.6 | 4.095 | 48.21 | 280.0 | HIP 17716 | 26.59 |
| 2025-12-02 | 03:48:59.32 | -70:44:03.9 | 4.090 | 48.33 | 281.7 | HIP 17716 | 13.03 |
| 2025-12-03 | 03:45:10.56 | -70:40:00.0 | 4.085 | 48.45 | 283.3 | HIP 17716 | 19.59 |
| 2025-12-04 | 03:41:23.57 | -70:35:22.9 | 4.081 | 48.57 | 285.0 | HIP 16882 | 20.75 |
| 2025-12-05 | 03:37:38.64 | -70:30:13.2 | 4.076 | 48.68 | 286.6 | HIP 16882 | 3.06 |
| 2025-12-06 | 03:33:56.03 | -70:24:31.1 | 4.072 | 48.78 | 288.2 | HIP 16395 | 14.61 |
| 2025-12-07 | 03:30:16.02 | -70:18:16.9 | 4.068 | 48.78 | 288.2 | HIP 16395 | 11.01 |