| Parameter |
Value |
| Designation |
358P/PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-11-11T04:28:15.360960Z |
| Orbit solution date (soln_date, UTC) |
2024-03-05T09:31:37Z |
| Obs used |
252 |
| NEO |
- |
| M1 |
7.800 |
| K1 |
30.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-08-02.0000000 |
| e |
0.23889221 |
| q (au) |
2.394903 |
| a (au) |
3.146602 |
| i (deg) |
11.060250 |
| Ω (om, deg) |
85.702465 |
| ω (w, deg) |
299.772862 |
| M (ma, deg) |
277.680859 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.358 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.358 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-06-01 00:00 |
12:24:53.50 |
+10:15:54.9 |
HIP 60510 |
9.18 |
| 2026-06-01 12:00 |
12:24:53.01 |
+10:14:06.7 |
HIP 60510 |
9.55 |
| 2026-06-02 00:00 |
12:24:52.76 |
+10:12:17.0 |
HIP 60510 |
10.29 |
| 2026-06-02 12:00 |
12:24:52.74 |
+10:10:25.9 |
HIP 60510 |
11.34 |
| 2026-06-03 00:00 |
12:24:52.96 |
+10:08:33.3 |
HIP 60510 |
12.64 |
| 2026-06-03 12:00 |
12:24:53.42 |
+10:06:39.4 |
HIP 60510 |
14.12 |
| 2026-06-04 00:00 |
12:24:54.12 |
+10:04:44.1 |
HIP 60510 |
15.75 |
| 2026-06-04 12:00 |
12:24:55.05 |
+10:02:47.3 |
HIP 60510 |
17.48 |
| 2026-06-05 00:00 |
12:24:56.22 |
+10:00:49.3 |
HIP 60628 |
17.92 |
| 2026-06-05 12:00 |
12:24:57.62 |
+09:58:49.8 |
HIP 60628 |
16.02 |
| 2026-06-06 00:00 |
12:24:59.26 |
+09:56:49.0 |
HIP 60628 |
14.11 |
| 2026-06-06 12:00 |
12:25:01.13 |
+09:54:46.9 |
HIP 60628 |
12.18 |
| 2026-06-07 00:00 |
12:25:03.23 |
+09:52:43.4 |
HIP 60628 |
10.27 |
| 2026-06-07 12:00 |
12:25:05.56 |
+09:50:38.6 |
HIP 60628 |
8.40 |
| 2026-06-08 00:00 |
12:25:08.13 |
+09:48:32.5 |
HIP 60628 |
6.64 |
| 2026-06-08 12:00 |
12:25:10.92 |
+09:46:25.1 |
HIP 60628 |
5.17 |
| 2026-06-09 00:00 |
12:25:13.95 |
+09:44:16.5 |
HIP 60628 |
4.33 |
| 2026-06-09 12:00 |
12:25:17.20 |
+09:42:06.5 |
HIP 60628 |
4.57 |
| 2026-06-10 00:00 |
12:25:20.69 |
+09:39:55.3 |
HIP 60628 |
5.80 |
| 2026-06-10 12:00 |
12:25:24.40 |
+09:37:42.8 |
HIP 60628 |
7.58 |
| 2026-06-11 00:00 |
12:25:28.33 |
+09:35:29.1 |
HIP 60628 |
9.65 |
| 2026-06-11 12:00 |
12:25:32.50 |
+09:33:14.2 |
HIP 60628 |
11.88 |
| 2026-06-12 00:00 |
12:25:36.88 |
+09:30:58.1 |
HIP 60628 |
14.21 |
| 2026-06-12 12:00 |
12:25:41.50 |
+09:28:40.7 |
HIP 60628 |
16.63 |
| 2026-06-13 00:00 |
12:25:46.33 |
+09:26:22.1 |
HIP 60628 |
19.11 |
| 2026-06-13 12:00 |
12:25:51.39 |
+09:24:02.4 |
HIP 60628 |
21.65 |
| 2026-06-14 00:00 |
12:25:56.68 |
+09:21:41.5 |
HIP 60628 |
24.25 |
| 2026-06-14 12:00 |
12:26:02.18 |
+09:19:19.4 |
HIP 60754 |
25.96 |
| 2026-06-15 00:00 |
12:26:07.90 |
+09:16:56.1 |
HIP 60754 |
23.20 |
| 2026-06-15 12:00 |
12:26:13.85 |
+09:14:31.7 |
HIP 60754 |
20.39 |
| 2026-06-16 00:00 |
12:26:20.01 |
+09:12:06.2 |
HIP 60754 |
17.54 |
| 2026-06-16 12:00 |
12:26:26.39 |
+09:09:39.6 |
HIP 60754 |
14.65 |
| 2026-06-17 00:00 |
12:26:32.98 |
+09:07:11.8 |
HIP 60754 |
11.71 |
| 2026-06-17 12:00 |
12:26:39.79 |
+09:04:43.0 |
HIP 60754 |
8.73 |
| 2026-06-18 00:00 |
12:26:46.82 |
+09:02:13.1 |
HIP 60754 |
5.71 |
| 2026-06-18 12:00 |
12:26:54.06 |
+08:59:42.1 |
HIP 60754 |
2.71 |
| 2026-06-19 00:00 |
12:27:01.51 |
+08:57:10.0 |
HIP 60754 |
1.05 |
| 2026-06-19 12:00 |
12:27:09.17 |
+08:54:37.0 |
HIP 60754 |
3.84 |
| 2026-06-20 00:00 |
12:27:17.04 |
+08:52:02.8 |
HIP 60754 |
7.01 |
| 2026-06-20 12:00 |
12:27:25.12 |
+08:49:27.7 |
HIP 60815 |
8.35 |
| 2026-06-21 00:00 |
12:27:33.40 |
+08:46:51.6 |
HIP 60815 |
8.66 |
| 2026-06-21 12:00 |
12:27:41.89 |
+08:44:14.4 |
HIP 60804 |
7.62 |
| 2026-06-22 00:00 |
12:27:50.59 |
+08:41:36.3 |
HIP 60804 |
5.41 |