C/2024 E1 (Wierzchos)
Metadata
| Parameter | Value |
|---|---|
| Designation | C/2024 E1 (Wierzchos) |
| Type | C |
| Perihelion (tp_cal, UTC) | 2026-01-20T18:18:31.898880Z |
| Orbit solution date (soln_date, UTC) | 2026-03-23T09:05:43Z |
| Obs used | 2198 |
| NEO | - |
| M1 | 11.700 |
| K1 | 4.500 |
| PC | - |
| Discovery observation (MPC, UTC) | 2024-03-03T10:42:00.662400Z |
| Discovery magnitude (MPC) | 20.48 G |
| Discovery observatory (MPC) | G96 · Mt. Lemmon Survey |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2025-05-12.0000000 |
| e | 1.00005701 |
| q (au) | 0.565937 |
| a (au) | -9927.459100 |
| i (deg) | 75.238516 |
| Ω (om, deg) | 108.082555 |
| ω (w, deg) | 243.635155 |
| M (ma, deg) | -0.000253 |
Magnitude
Scatter + Global Linear
$$ M_a = (8.840 + 3.854\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 8.840 |
| n | 3.854 |
| gf | 1.000 |
| gb | -0.832 |
| k | 0.985 |
| δ90 | 10.000 |
| Parameter | Symbol | Range | Description |
|---|---|---|---|
| Absolute magnitude at 1 AU from Sun and Earth | H0 | -5 to 20 | Intrinsic brightness of the comet |
| Photometric slope parameter | n | 2 to 6 | Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor | gf |
0.8 to 1 | Degree of forward scattering |
| Backward scattering asymmetry factor | gb |
-1 to -0.5 | Degree of backward scattering |
| Partitioning coefficient | k | 0.8 to 1 | Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio | δ90 | 1 to 10 | Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) | End (UTC) | a | b |
|---|---|---|---|
| 2024-02-15 | 2025-09-04 | -0.5803 | +0.262 |
| 2025-09-04 | 2025-11-10 | -3.3430 | +1.527 |
| 2025-11-10 | 2026-01-04 | +2.9950 | +0.451 |
| 2026-01-23 | 2026-02-10 | +6.1194 | +0.481 |
| 2026-02-10 | 2026-03-01 | +0.9689 | -0.404 |
| 2026-03-01 | 2026-03-12 | +11.6915 | -0.864 |
| 2026-03-12 | 2026-03-30 | +5.9167 | -0.127 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Finding Chart
Ephemeris
| Date/Time (UTC) | RA (J2000) | Dec (J2000) | Nearest HIP | Dist from HIP (arcmin) |
|---|---|---|---|---|
| 2026-03-26 00:00 | 04:21:37.85 | +08:37:42.7 | HIP 20273 | 18.72 |
| 2026-03-26 12:00 | 04:23:04.25 | +08:56:28.3 | HIP 20458 | 18.51 |
| 2026-03-27 00:00 | 04:24:29.83 | +09:14:55.6 | HIP 20522 | 15.81 |
| 2026-03-27 12:00 | 04:25:54.62 | +09:33:05.0 | HIP 20672 | 10.90 |
| 2026-03-28 00:00 | 04:27:18.63 | +09:50:56.9 | HIP 20831 | 12.81 |
| 2026-03-28 12:00 | 04:28:41.88 | +10:08:31.4 | HIP 20845 | 10.45 |
| 2026-03-29 00:00 | 04:30:04.38 | +10:25:49.0 | HIP 20963 | 7.63 |
| 2026-03-29 12:00 | 04:31:26.16 | +10:42:50.0 | HIP 21066 | 7.49 |
| 2026-03-30 00:00 | 04:32:47.23 | +10:59:34.6 | HIP 21176 | 21.94 |
| 2026-03-30 12:00 | 04:34:07.61 | +11:16:03.3 | HIP 21335 | 16.47 |
| 2026-03-31 00:00 | 04:35:27.31 | +11:32:16.2 | HIP 21335 | 10.95 |
| 2026-03-31 12:00 | 04:36:46.35 | +11:48:13.7 | HIP 21475 | 6.64 |
| 2026-04-01 00:00 | 04:38:04.74 | +12:03:56.1 | HIP 21650 | 13.20 |
| 2026-04-01 12:00 | 04:39:22.50 | +12:19:23.6 | HIP 21735 | 12.52 |
| 2026-04-02 00:00 | 04:40:39.64 | +12:34:36.6 | HIP 21723 | 14.97 |
| 2026-04-02 12:00 | 04:41:56.18 | +12:49:35.2 | HIP 22012 | 29.84 |
| 2026-04-03 00:00 | 04:43:12.13 | +13:04:19.9 | HIP 22021 | 13.47 |
| 2026-04-03 12:00 | 04:44:27.51 | +13:18:50.7 | HIP 22021 | 20.22 |
| 2026-04-04 00:00 | 04:45:42.32 | +13:33:08.1 | HIP 22183 | 19.61 |
| 2026-04-04 12:00 | 04:46:56.58 | +13:47:12.3 | HIP 22183 | 9.16 |
| 2026-04-05 00:00 | 04:48:10.30 | +14:01:03.4 | HIP 22183 | 28.59 |
| 2026-04-05 12:00 | 04:49:23.49 | +14:14:41.8 | HIP 22556 | 27.73 |
| 2026-04-06 00:00 | 04:50:36.16 | +14:28:07.7 | HIP 22556 | 11.49 |
| 2026-04-06 12:00 | 04:51:48.33 | +14:41:21.3 | HIP 22688 | 14.26 |
| 2026-04-07 00:00 | 04:53:00.01 | +14:54:22.8 | HIP 22688 | 17.37 |
| 2026-04-07 12:00 | 04:54:11.21 | +15:07:12.6 | HIP 22886 | 17.71 |
| 2026-04-08 00:00 | 04:55:21.93 | +15:19:50.7 | HIP 22886 | 8.02 |
| 2026-04-08 12:00 | 04:56:32.18 | +15:32:17.4 | HIP 22967 | 16.55 |
| 2026-04-09 00:00 | 04:57:41.99 | +15:44:33.0 | HIP 23094 | 7.84 |
| 2026-04-09 12:00 | 04:58:51.35 | +15:56:37.6 | HIP 23214 | 12.82 |
| 2026-04-10 00:00 | 05:00:00.28 | +16:08:31.4 | HIP 23214 | 14.05 |
| 2026-04-10 12:00 | 05:01:08.78 | +16:20:14.6 | HIP 23423 | 15.60 |
| 2026-04-11 00:00 | 05:02:16.87 | +16:31:47.5 | HIP 23423 | 20.64 |
| 2026-04-11 12:00 | 05:03:24.54 | +16:43:10.2 | HIP 23574 | 26.22 |
| 2026-04-12 00:00 | 05:04:31.82 | +16:54:22.8 | HIP 23574 | 14.56 |
| 2026-04-12 12:00 | 05:05:38.70 | +17:05:25.7 | HIP 23707 | 17.56 |
| 2026-04-13 00:00 | 05:06:45.21 | +17:16:18.9 | HIP 23707 | 15.26 |
| 2026-04-13 12:00 | 05:07:51.33 | +17:27:02.6 | HIP 23707 | 29.84 |
| 2026-04-14 00:00 | 05:08:57.09 | +17:37:37.0 | HIP 24000 | 19.15 |
| 2026-04-14 12:00 | 05:10:02.48 | +17:48:02.4 | HIP 24000 | 9.08 |
| 2026-04-15 00:00 | 05:11:07.52 | +17:58:18.7 | HIP 24251 | 18.24 |
| 2026-04-15 12:00 | 05:12:12.21 | +18:08:26.2 | HIP 24251 | 5.65 |
| 2026-04-16 00:00 | 05:13:16.56 | +18:18:25.1 | HIP 24298 | 10.89 |