| Parameter |
Value |
| Designation |
C/2024 PN7 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-12-06T10:29:19.893120Z |
| Orbit solution date (soln_date, UTC) |
2025-07-31T12:12:32Z |
| Obs used |
361 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
10.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-21.0000000 |
| e |
0.97739714 |
| q (au) |
1.524538 |
| a (au) |
67.448918 |
| i (deg) |
101.210654 |
| Ω (om, deg) |
358.582175 |
| ω (w, deg) |
74.271986 |
| M (ma, deg) |
359.972533 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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 |
10:53:35.61 |
-09:56:26.1 |
HIP 53268 |
15.05 |
| 2026-07-29 12:00 |
10:53:45.91 |
-09:57:56.6 |
HIP 53268 |
13.54 |
| 2026-07-30 00:00 |
10:53:56.25 |
-09:59:27.8 |
HIP 53268 |
12.54 |
| 2026-07-30 12:00 |
10:54:06.64 |
-10:00:59.6 |
HIP 53371 |
11.44 |
| 2026-07-31 00:00 |
10:54:17.08 |
-10:02:32.1 |
HIP 53371 |
8.50 |
| 2026-07-31 12:00 |
10:54:27.57 |
-10:04:05.2 |
HIP 53371 |
5.61 |
| 2026-08-01 00:00 |
10:54:38.10 |
-10:05:38.9 |
HIP 53371 |
2.98 |
| 2026-08-01 12:00 |
10:54:48.68 |
-10:07:13.3 |
HIP 53371 |
2.15 |
| 2026-08-02 00:00 |
10:54:59.31 |
-10:08:48.4 |
HIP 53371 |
4.36 |
| 2026-08-02 12:00 |
10:55:09.97 |
-10:10:24.0 |
HIP 53371 |
7.23 |
| 2026-08-03 00:00 |
10:55:20.69 |
-10:12:00.4 |
HIP 53371 |
10.23 |
| 2026-08-03 12:00 |
10:55:31.44 |
-10:13:37.3 |
HIP 53371 |
13.29 |
| 2026-08-04 00:00 |
10:55:42.24 |
-10:15:14.9 |
HIP 53371 |
16.38 |
| 2026-08-04 12:00 |
10:55:53.07 |
-10:16:53.1 |
HIP 53371 |
19.49 |
| 2026-08-05 00:00 |
10:56:03.95 |
-10:18:31.9 |
HIP 53474 |
19.36 |
| 2026-08-05 12:00 |
10:56:14.87 |
-10:20:11.4 |
HIP 53474 |
17.35 |
| 2026-08-06 00:00 |
10:56:25.83 |
-10:21:51.5 |
HIP 53474 |
15.71 |
| 2026-08-06 12:00 |
10:56:36.82 |
-10:23:32.1 |
HIP 53474 |
14.57 |
| 2026-08-07 00:00 |
10:56:47.86 |
-10:25:13.5 |
HIP 53474 |
14.08 |
| 2026-08-07 12:00 |
10:56:58.93 |
-10:26:55.4 |
HIP 53474 |
14.30 |
| 2026-08-08 00:00 |
10:57:10.04 |
-10:28:37.9 |
HIP 53474 |
15.20 |
| 2026-08-08 12:00 |
10:57:21.18 |
-10:30:21.1 |
HIP 53474 |
16.70 |
| 2026-08-09 00:00 |
10:57:32.36 |
-10:32:04.8 |
HIP 53474 |
18.64 |
| 2026-08-09 12:00 |
10:57:43.57 |
-10:33:49.2 |
HIP 53474 |
20.92 |
| 2026-08-10 00:00 |
10:57:54.82 |
-10:35:34.1 |
HIP 53474 |
23.43 |
| 2026-08-10 12:00 |
10:58:06.09 |
-10:37:19.7 |
HIP 53705 |
25.06 |
| 2026-08-11 00:00 |
10:58:17.40 |
-10:39:05.8 |
HIP 53705 |
24.57 |
| 2026-08-11 12:00 |
10:58:28.74 |
-10:40:52.5 |
HIP 53705 |
24.53 |
| 2026-08-12 00:00 |
10:58:40.11 |
-10:42:39.9 |
HIP 53705 |
24.93 |
| 2026-08-12 12:00 |
10:58:51.51 |
-10:44:27.8 |
HIP 53705 |
25.76 |
| 2026-08-13 00:00 |
10:59:02.94 |
-10:46:16.2 |
HIP 53705 |
26.99 |
| 2026-08-13 12:00 |
10:59:14.40 |
-10:48:05.3 |
HIP 53705 |
28.57 |
| 2026-08-14 00:00 |
10:59:25.88 |
-10:49:54.9 |
HIP 53705 |
30.45 |
| 2026-08-14 12:00 |
10:59:37.39 |
-10:51:45.1 |
HIP 53705 |
32.58 |
| 2026-08-15 00:00 |
10:59:48.93 |
-10:53:35.9 |
HIP 53705 |
34.92 |
| 2026-08-15 12:00 |
11:00:00.48 |
-10:55:27.2 |
HIP 53705 |
37.42 |
| 2026-08-16 00:00 |
11:00:12.07 |
-10:57:19.1 |
HIP 53705 |
40.07 |
| 2026-08-16 12:00 |
11:00:23.67 |
-10:59:11.5 |
HIP 53705 |
42.83 |
| 2026-08-17 00:00 |
11:00:35.30 |
-11:01:04.5 |
HIP 54029 |
42.73 |
| 2026-08-17 12:00 |
11:00:46.95 |
-11:02:58.0 |
HIP 54029 |
39.36 |
| 2026-08-18 00:00 |
11:00:58.61 |
-11:04:52.1 |
HIP 54029 |
35.99 |
| 2026-08-18 12:00 |
11:01:10.30 |
-11:06:46.7 |
HIP 54029 |
32.62 |
| 2026-08-19 00:00 |
11:01:22.01 |
-11:08:41.8 |
HIP 54029 |
29.27 |