| Parameter |
Value |
| Designation |
116P/Wild 4 |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2016-01-11T12:37:31.860480Z |
| Orbit solution date (soln_date, UTC) |
2024-09-13T12:15:05Z |
| Obs used |
4667 |
| NEO |
- |
| M1 |
7.600 |
| K1 |
17.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-04-16.0000000 |
| e |
0.37227703 |
| q (au) |
2.187086 |
| a (au) |
3.484158 |
| i (deg) |
3.607844 |
| Ω (om, deg) |
20.991856 |
| ω (w, deg) |
173.310727 |
| M (ma, deg) |
14.469123 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.718 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.718 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.870 |
| k |
0.999 |
| 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 |
| 2020-12-05 |
2024-09-04 |
+8.4097 |
-3.455 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
02:21:50.31 |
+14:42:06.6 |
HIP 10895 |
33.70 |
| 2026-06-01 12:00 |
02:22:15.75 |
+14:44:22.3 |
HIP 10895 |
39.70 |
| 2026-06-02 00:00 |
02:22:41.15 |
+14:46:37.7 |
HIP 11134 |
39.33 |
| 2026-06-02 12:00 |
02:23:06.50 |
+14:48:52.6 |
HIP 11134 |
36.21 |
| 2026-06-03 00:00 |
02:23:31.82 |
+14:51:07.2 |
HIP 11298 |
33.59 |
| 2026-06-03 12:00 |
02:23:57.09 |
+14:53:21.4 |
HIP 11298 |
30.18 |
| 2026-06-04 00:00 |
02:24:22.32 |
+14:55:35.2 |
HIP 11298 |
27.90 |
| 2026-06-04 12:00 |
02:24:47.50 |
+14:57:48.6 |
HIP 11298 |
27.02 |
| 2026-06-05 00:00 |
02:25:12.63 |
+15:00:01.6 |
HIP 11298 |
27.66 |
| 2026-06-05 12:00 |
02:25:37.72 |
+15:02:14.2 |
HIP 11298 |
29.73 |
| 2026-06-06 00:00 |
02:26:02.76 |
+15:04:26.4 |
HIP 11298 |
32.94 |
| 2026-06-06 12:00 |
02:26:27.76 |
+15:06:38.2 |
HIP 11512 |
35.24 |
| 2026-06-07 00:00 |
02:26:52.70 |
+15:08:49.6 |
HIP 11512 |
32.07 |
| 2026-06-07 12:00 |
02:27:17.60 |
+15:11:00.5 |
HIP 11512 |
29.96 |
| 2026-06-08 00:00 |
02:27:42.44 |
+15:13:11.1 |
HIP 11560 |
28.81 |
| 2026-06-08 12:00 |
02:28:07.24 |
+15:15:21.2 |
HIP 11560 |
23.69 |
| 2026-06-09 00:00 |
02:28:31.98 |
+15:17:31.0 |
HIP 11560 |
19.33 |
| 2026-06-09 12:00 |
02:28:56.67 |
+15:19:40.3 |
HIP 11619 |
13.79 |
| 2026-06-10 00:00 |
02:29:21.31 |
+15:21:49.1 |
HIP 11619 |
7.56 |
| 2026-06-10 12:00 |
02:29:45.89 |
+15:23:57.6 |
HIP 11619 |
2.02 |
| 2026-06-11 00:00 |
02:30:10.42 |
+15:26:05.6 |
HIP 11619 |
5.50 |
| 2026-06-11 12:00 |
02:30:34.89 |
+15:28:13.2 |
HIP 11619 |
11.62 |
| 2026-06-12 00:00 |
02:30:59.31 |
+15:30:20.3 |
HIP 11619 |
17.83 |
| 2026-06-12 12:00 |
02:31:23.67 |
+15:32:27.0 |
HIP 11619 |
24.04 |
| 2026-06-13 00:00 |
02:31:47.97 |
+15:34:33.3 |
HIP 11827 |
27.63 |
| 2026-06-13 12:00 |
02:32:12.21 |
+15:36:39.1 |
HIP 11827 |
27.62 |
| 2026-06-14 00:00 |
02:32:36.39 |
+15:38:44.5 |
HIP 11827 |
28.97 |
| 2026-06-14 12:00 |
02:33:00.51 |
+15:40:49.4 |
HIP 11827 |
31.49 |
| 2026-06-15 00:00 |
02:33:24.57 |
+15:42:53.9 |
HIP 12015 |
29.59 |
| 2026-06-15 12:00 |
02:33:48.56 |
+15:44:57.9 |
HIP 12015 |
27.17 |
| 2026-06-16 00:00 |
02:34:12.49 |
+15:47:01.5 |
HIP 12015 |
26.00 |
| 2026-06-16 12:00 |
02:34:36.36 |
+15:49:04.5 |
HIP 12015 |
26.25 |
| 2026-06-17 00:00 |
02:35:00.16 |
+15:51:07.2 |
HIP 12015 |
27.85 |
| 2026-06-17 12:00 |
02:35:23.89 |
+15:53:09.3 |
HIP 12015 |
30.59 |
| 2026-06-18 00:00 |
02:35:47.55 |
+15:55:11.0 |
HIP 12015 |
34.19 |
| 2026-06-18 12:00 |
02:36:11.15 |
+15:57:12.2 |
HIP 12015 |
38.39 |
| 2026-06-19 00:00 |
02:36:34.68 |
+15:59:13.0 |
HIP 12075 |
39.71 |
| 2026-06-19 12:00 |
02:36:58.14 |
+16:01:13.2 |
HIP 12075 |
40.09 |
| 2026-06-20 00:00 |
02:37:21.53 |
+16:03:13.0 |
HIP 12075 |
41.34 |
| 2026-06-20 12:00 |
02:37:44.84 |
+16:05:12.3 |
HIP 12075 |
43.37 |
| 2026-06-21 00:00 |
02:38:08.09 |
+16:07:11.1 |
HIP 12230 |
43.38 |
| 2026-06-21 12:00 |
02:38:31.26 |
+16:09:09.5 |
HIP 12538 |
41.06 |
| 2026-06-22 00:00 |
02:38:54.36 |
+16:11:07.3 |
HIP 12538 |
36.02 |