| Parameter |
Value |
| Designation |
351P/Wiegert-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-26T14:53:45.628800Z |
| Orbit solution date (soln_date, UTC) |
2026-01-07T15:43:05Z |
| Obs used |
315 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
18.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-08-22.0000000 |
| e |
0.29492996 |
| q (au) |
3.130422 |
| a (au) |
4.439874 |
| i (deg) |
12.776645 |
| Ω (om, deg) |
283.405061 |
| ω (w, deg) |
352.656240 |
| M (ma, deg) |
298.619005 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.665 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.665 |
| n |
2.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
00:27:37.36 |
+18:27:09.4 |
HIP 2068 |
21.71 |
| 2026-07-29 12:00 |
00:27:37.05 |
+18:29:09.1 |
HIP 2068 |
21.06 |
| 2026-07-30 00:00 |
00:27:36.50 |
+18:31:07.3 |
HIP 2068 |
20.53 |
| 2026-07-30 12:00 |
00:27:35.71 |
+18:33:03.9 |
HIP 2068 |
20.12 |
| 2026-07-31 00:00 |
00:27:34.68 |
+18:34:58.9 |
HIP 2068 |
19.84 |
| 2026-07-31 12:00 |
00:27:33.41 |
+18:36:52.3 |
HIP 2068 |
19.69 |
| 2026-08-01 00:00 |
00:27:31.90 |
+18:38:44.0 |
HIP 2068 |
19.67 |
| 2026-08-01 12:00 |
00:27:30.15 |
+18:40:34.2 |
HIP 2068 |
19.76 |
| 2026-08-02 00:00 |
00:27:28.16 |
+18:42:22.6 |
HIP 2068 |
19.96 |
| 2026-08-02 12:00 |
00:27:25.92 |
+18:44:09.5 |
HIP 2068 |
20.28 |
| 2026-08-03 00:00 |
00:27:23.45 |
+18:45:54.6 |
HIP 2068 |
20.69 |
| 2026-08-03 12:00 |
00:27:20.73 |
+18:47:38.1 |
HIP 2068 |
21.19 |
| 2026-08-04 00:00 |
00:27:17.78 |
+18:49:19.9 |
HIP 2068 |
21.78 |
| 2026-08-04 12:00 |
00:27:14.58 |
+18:51:00.0 |
HIP 2068 |
22.44 |
| 2026-08-05 00:00 |
00:27:11.14 |
+18:52:38.3 |
HIP 2048 |
21.08 |
| 2026-08-05 12:00 |
00:27:07.45 |
+18:54:14.9 |
HIP 2048 |
19.47 |
| 2026-08-06 00:00 |
00:27:03.53 |
+18:55:49.7 |
HIP 2048 |
17.86 |
| 2026-08-06 12:00 |
00:26:59.37 |
+18:57:22.8 |
HIP 2048 |
16.27 |
| 2026-08-07 00:00 |
00:26:54.96 |
+18:58:54.1 |
HIP 2048 |
14.69 |
| 2026-08-07 12:00 |
00:26:50.32 |
+19:00:23.6 |
HIP 2048 |
13.14 |
| 2026-08-08 00:00 |
00:26:45.43 |
+19:01:51.4 |
HIP 2048 |
11.62 |
| 2026-08-08 12:00 |
00:26:40.30 |
+19:03:17.3 |
HIP 2048 |
10.17 |
| 2026-08-09 00:00 |
00:26:34.94 |
+19:04:41.3 |
HIP 2048 |
8.83 |
| 2026-08-09 12:00 |
00:26:29.33 |
+19:06:03.5 |
HIP 2048 |
7.65 |
| 2026-08-10 00:00 |
00:26:23.49 |
+19:07:23.9 |
HIP 2048 |
6.75 |
| 2026-08-10 12:00 |
00:26:17.41 |
+19:08:42.4 |
HIP 2048 |
6.27 |
| 2026-08-11 00:00 |
00:26:11.09 |
+19:09:59.1 |
HIP 2048 |
6.31 |
| 2026-08-11 12:00 |
00:26:04.53 |
+19:11:13.8 |
HIP 2048 |
6.88 |
| 2026-08-12 00:00 |
00:25:57.74 |
+19:12:26.6 |
HIP 2048 |
7.90 |
| 2026-08-12 12:00 |
00:25:50.71 |
+19:13:37.6 |
HIP 2048 |
9.23 |
| 2026-08-13 00:00 |
00:25:43.45 |
+19:14:46.6 |
HIP 2048 |
10.76 |
| 2026-08-13 12:00 |
00:25:35.95 |
+19:15:53.7 |
HIP 2048 |
12.45 |
| 2026-08-14 00:00 |
00:25:28.23 |
+19:16:58.8 |
HIP 2048 |
14.24 |
| 2026-08-14 12:00 |
00:25:20.27 |
+19:18:02.0 |
HIP 2048 |
16.11 |
| 2026-08-15 00:00 |
00:25:12.08 |
+19:19:03.2 |
HIP 2048 |
18.05 |
| 2026-08-15 12:00 |
00:25:03.67 |
+19:20:02.5 |
HIP 2048 |
20.05 |
| 2026-08-16 00:00 |
00:24:55.03 |
+19:20:59.7 |
HIP 2048 |
22.11 |
| 2026-08-16 12:00 |
00:24:46.16 |
+19:21:55.0 |
HIP 2048 |
24.21 |
| 2026-08-17 00:00 |
00:24:37.07 |
+19:22:48.4 |
HIP 2048 |
26.36 |
| 2026-08-17 12:00 |
00:24:27.76 |
+19:23:39.7 |
HIP 2048 |
28.55 |
| 2026-08-18 00:00 |
00:24:18.22 |
+19:24:29.0 |
HIP 2048 |
30.78 |
| 2026-08-18 12:00 |
00:24:08.47 |
+19:25:16.3 |
HIP 1757 |
31.71 |
| 2026-08-19 00:00 |
00:23:58.50 |
+19:26:01.5 |
HIP 1757 |
30.23 |