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
$$ M_a = (9.815 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta $$ $$ \theta = 180^\circ - \alpha $$ $$ \Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b) $$ $$ \Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1 $$
Model Parameters
| Parameter | Value |
|---|---|
| H0 | 9.815 |
| 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 | +41.0343 | -14.189 |
| 2026-03-12 | 2026-07-06 | +6.4400 | -2.019 |
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) |
|---|---|---|---|---|
| 2026-07-29 00:00 | 10:46:45.40 | +07:59:15.2 | HIP 52604 | 19.71 |
| 2026-07-29 12:00 | 10:47:47.08 | +07:49:27.4 | HIP 52871 | 27.66 |
| 2026-07-30 00:00 | 10:48:48.73 | +07:39:39.4 | HIP 52871 | 33.61 |
| 2026-07-30 12:00 | 10:49:50.35 | +07:29:51.2 | HIP 53133 | 34.67 |
| 2026-07-31 00:00 | 10:50:51.95 | +07:20:02.9 | HIP 53133 | 20.82 |
| 2026-07-31 12:00 | 10:51:53.53 | +07:10:14.3 | HIP 53201 | 14.45 |
| 2026-08-01 00:00 | 10:52:55.08 | +07:00:25.7 | HIP 53201 | 12.68 |
| 2026-08-01 12:00 | 10:53:56.60 | +06:50:36.9 | HIP 53420 | 26.39 |
| 2026-08-02 00:00 | 10:54:58.10 | +06:40:48.0 | HIP 53420 | 19.74 |
| 2026-08-02 12:00 | 10:55:59.57 | +06:30:58.9 | HIP 53531 | 18.44 |
| 2026-08-03 00:00 | 10:57:01.02 | +06:21:09.8 | HIP 53531 | 3.13 |
| 2026-08-03 12:00 | 10:58:02.45 | +06:11:20.6 | HIP 53531 | 18.40 |
| 2026-08-04 00:00 | 10:59:03.86 | +06:01:31.2 | HIP 53824 | 25.52 |
| 2026-08-04 12:00 | 11:00:05.24 | +05:51:41.8 | HIP 53817 | 11.48 |
| 2026-08-05 00:00 | 11:01:06.60 | +05:41:52.4 | HIP 53817 | 7.29 |
| 2026-08-05 12:00 | 11:02:07.94 | +05:32:02.8 | HIP 53856 | 20.04 |
| 2026-08-06 00:00 | 11:03:09.25 | +05:22:13.2 | HIP 54108 | 19.45 |
| 2026-08-06 12:00 | 11:04:10.55 | +05:12:23.6 | HIP 54108 | 2.39 |
| 2026-08-07 00:00 | 11:05:11.82 | +05:02:34.0 | HIP 54188 | 6.77 |
| 2026-08-07 12:00 | 11:06:13.07 | +04:52:44.3 | HIP 54213 | 9.75 |
| 2026-08-08 00:00 | 11:07:14.31 | +04:42:54.6 | HIP 54440 | 22.51 |
| 2026-08-08 12:00 | 11:08:15.52 | +04:33:05.0 | HIP 54440 | 5.70 |
| 2026-08-09 00:00 | 11:09:16.71 | +04:23:15.3 | HIP 54440 | 14.71 |
| 2026-08-09 12:00 | 11:10:17.89 | +04:13:25.7 | HIP 54565 | 31.33 |
| 2026-08-10 00:00 | 11:11:19.04 | +04:03:36.0 | HIP 54565 | 29.70 |
| 2026-08-10 12:00 | 11:12:20.18 | +03:53:46.5 | HIP 54661 | 27.35 |
| 2026-08-11 00:00 | 11:13:21.30 | +03:43:57.0 | HIP 54853 | 19.83 |
| 2026-08-11 12:00 | 11:14:22.39 | +03:34:07.6 | HIP 54853 | 11.81 |
| 2026-08-12 00:00 | 11:15:23.47 | +03:24:18.2 | HIP 54853 | 23.31 |
| 2026-08-12 12:00 | 11:16:24.53 | +03:14:28.9 | HIP 55231 | 33.78 |
| 2026-08-13 00:00 | 11:17:25.58 | +03:04:39.8 | HIP 55231 | 18.35 |
| 2026-08-13 12:00 | 11:18:26.60 | +02:54:50.8 | HIP 55231 | 13.76 |
| 2026-08-14 00:00 | 11:19:27.61 | +02:45:01.8 | HIP 55408 | 21.24 |
| 2026-08-14 12:00 | 11:20:28.59 | +02:35:13.1 | HIP 55416 | 12.01 |
| 2026-08-15 00:00 | 11:21:29.56 | +02:25:24.5 | HIP 55416 | 8.37 |
| 2026-08-15 12:00 | 11:22:30.51 | +02:15:36.0 | HIP 55416 | 25.53 |
| 2026-08-16 00:00 | 11:23:31.45 | +02:05:47.8 | HIP 55699 | 18.41 |
| 2026-08-16 12:00 | 11:24:32.36 | +01:55:59.7 | HIP 55699 | 10.30 |
| 2026-08-17 00:00 | 11:25:33.26 | +01:46:11.8 | HIP 55699 | 22.99 |
| 2026-08-17 12:00 | 11:26:34.14 | +01:36:24.1 | HIP 55906 | 23.57 |
| 2026-08-18 00:00 | 11:27:35.00 | +01:26:36.7 | HIP 55906 | 8.53 |
| 2026-08-18 12:00 | 11:28:35.84 | +01:16:49.5 | HIP 56015 | 5.39 |
| 2026-08-19 00:00 | 11:29:36.67 | +01:07:02.5 | HIP 56027 | 9.58 |