63P/Wild 1
Metadata
| Parameter | Value |
|---|---|
| Designation | 63P/Wild 1 |
| Type | P |
| Perihelion (tp_cal, UTC) | 2013-04-11T02:18:13.561920Z |
| Orbit solution date (soln_date, UTC) | 2026-07-17T07:41:09Z |
| Obs used | 2765 |
| NEO | - |
| M1 | 7.400 |
| K1 | 24.750 |
| PC | 0.030 |
Osculating Elements
| Parameter | Value |
|---|---|
| Epoch (epoch_cal, TDB) | 2016-06-26.0000000 |
| e | 0.65103196 |
| q (au) | 1.952721 |
| a (au) | 5.595703 |
| i (deg) | 19.784868 |
| Ω (om, deg) | 357.970177 |
| ω (w, deg) | 169.140646 |
| M (ma, deg) | 87.259794 |
Magnitude
Scatter + Global Linear
$$ M_a = (9.812 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 9.812 |
| n | 6.000 |
| gf | 1.000 |
| gb | -0.500 |
| k | 1.000 |
| 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 |
|---|---|---|---|
| 2025-10-24 | 2026-03-12 | +42.3091 | -14.612 |
| 2026-03-12 | 2026-08-02 | +6.2622 | -1.941 |
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) |
|---|---|---|---|---|
| 2026-09-20 00:00 | 12:34:08.51 | -09:03:13.3 | HIP 61318 | 24.50 |
| 2026-09-20 12:00 | 12:35:08.88 | -09:12:24.1 | HIP 61485 | 14.07 |
| 2026-09-21 00:00 | 12:36:09.26 | -09:21:34.0 | HIP 61485 | 18.72 |
| 2026-09-21 12:00 | 12:37:09.63 | -09:30:43.0 | HIP 61606 | 10.30 |
| 2026-09-22 00:00 | 12:38:10.01 | -09:39:51.2 | HIP 61606 | 9.58 |
| 2026-09-22 12:00 | 12:39:10.38 | -09:48:58.5 | HIP 61606 | 26.20 |
| 2026-09-23 00:00 | 12:40:10.76 | -09:58:04.9 | HIP 61904 | 16.90 |
| 2026-09-23 12:00 | 12:41:11.14 | -10:07:10.4 | HIP 61904 | 17.79 |
| 2026-09-24 00:00 | 12:42:11.52 | -10:16:15.0 | HIP 61892 | 20.48 |
| 2026-09-24 12:00 | 12:43:11.91 | -10:25:18.7 | HIP 62173 | 27.68 |
| 2026-09-25 00:00 | 12:44:12.29 | -10:34:21.5 | HIP 62217 | 28.62 |
| 2026-09-25 12:00 | 12:45:12.68 | -10:43:23.3 | HIP 62217 | 16.71 |
| 2026-09-26 00:00 | 12:46:13.07 | -10:52:24.3 | HIP 62217 | 18.49 |
| 2026-09-26 12:00 | 12:47:13.47 | -11:01:24.3 | HIP 62480 | 15.50 |
| 2026-09-27 00:00 | 12:48:13.87 | -11:10:23.3 | HIP 62480 | 11.80 |
| 2026-09-27 12:00 | 12:49:14.27 | -11:19:21.4 | HIP 62480 | 25.26 |
| 2026-09-28 00:00 | 12:50:14.68 | -11:28:18.6 | HIP 62715 | 18.10 |
| 2026-09-28 12:00 | 12:51:15.09 | -11:37:14.8 | HIP 62740 | 13.51 |
| 2026-09-29 00:00 | 12:52:15.51 | -11:46:10.0 | HIP 62740 | 14.33 |
| 2026-09-29 12:00 | 12:53:15.93 | -11:55:04.2 | HIP 62983 | 22.30 |
| 2026-09-30 00:00 | 12:54:16.36 | -12:03:57.5 | HIP 62983 | 25.05 |
| 2026-09-30 12:00 | 12:55:16.80 | -12:12:49.8 | HIP 63189 | 26.59 |
| 2026-10-01 00:00 | 12:56:17.24 | -12:21:41.1 | HIP 63220 | 22.26 |
| 2026-10-01 12:00 | 12:57:17.69 | -12:30:31.4 | HIP 63313 | 17.88 |
| 2026-10-02 00:00 | 12:58:18.15 | -12:39:20.7 | HIP 63313 | 9.10 |
| 2026-10-02 12:00 | 12:59:18.61 | -12:48:09.0 | HIP 63313 | 20.88 |
| 2026-10-03 00:00 | 13:00:19.08 | -12:56:56.3 | HIP 63543 | 24.21 |
| 2026-10-03 12:00 | 13:01:19.56 | -13:05:42.5 | HIP 63543 | 28.65 |
| 2026-10-04 00:00 | 13:02:20.05 | -13:14:27.8 | HIP 63709 | 21.78 |
| 2026-10-04 12:00 | 13:03:20.55 | -13:23:12.0 | HIP 63789 | 17.79 |
| 2026-10-05 00:00 | 13:04:21.05 | -13:31:55.1 | HIP 63789 | 16.22 |
| 2026-10-05 12:00 | 13:05:21.56 | -13:40:37.3 | HIP 63915 | 27.10 |
| 2026-10-06 00:00 | 13:06:22.08 | -13:49:18.3 | HIP 63915 | 18.91 |
| 2026-10-06 12:00 | 13:07:22.61 | -13:57:58.3 | HIP 64056 | 13.91 |
| 2026-10-07 00:00 | 13:08:23.15 | -14:06:37.2 | HIP 64056 | 11.62 |
| 2026-10-07 12:00 | 13:09:23.69 | -14:15:15.1 | HIP 64056 | 25.62 |
| 2026-10-08 00:00 | 13:10:24.25 | -14:23:51.9 | HIP 64335 | 15.32 |
| 2026-10-08 12:00 | 13:11:24.81 | -14:32:27.5 | HIP 64335 | 18.10 |
| 2026-10-09 00:00 | 13:12:25.38 | -14:41:02.1 | HIP 64335 | 31.58 |
| 2026-10-09 12:00 | 13:13:25.96 | -14:49:35.6 | HIP 64628 | 23.05 |
| 2026-10-10 00:00 | 13:14:26.55 | -14:58:08.0 | HIP 64628 | 6.11 |
| 2026-10-10 12:00 | 13:15:27.14 | -15:06:39.2 | HIP 64628 | 10.83 |
| 2026-10-11 00:00 | 13:16:27.75 | -15:15:09.3 | HIP 64843 | 23.50 |