| 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) |
| 2026-09-20 00:00 |
11:13:59.42 |
-13:27:35.4 |
HIP 54815 |
22.96 |
| 2026-09-20 12:00 |
11:14:10.89 |
-13:29:58.4 |
HIP 54815 |
22.34 |
| 2026-09-21 00:00 |
11:14:22.33 |
-13:32:21.7 |
HIP 54815 |
22.30 |
| 2026-09-21 12:00 |
11:14:33.75 |
-13:34:45.3 |
HIP 54815 |
22.85 |
| 2026-09-22 00:00 |
11:14:45.14 |
-13:37:09.3 |
HIP 54815 |
23.94 |
| 2026-09-22 12:00 |
11:14:56.50 |
-13:39:33.5 |
HIP 54815 |
25.51 |
| 2026-09-23 00:00 |
11:15:07.83 |
-13:41:58.1 |
HIP 54815 |
27.46 |
| 2026-09-23 12:00 |
11:15:19.13 |
-13:44:22.9 |
HIP 54815 |
29.74 |
| 2026-09-24 00:00 |
11:15:30.40 |
-13:46:48.1 |
HIP 54815 |
32.25 |
| 2026-09-24 12:00 |
11:15:41.64 |
-13:49:13.5 |
HIP 54815 |
34.97 |
| 2026-09-25 00:00 |
11:15:52.85 |
-13:51:39.2 |
HIP 54815 |
37.83 |
| 2026-09-25 12:00 |
11:16:04.02 |
-13:54:05.3 |
HIP 55095 |
37.97 |
| 2026-09-26 00:00 |
11:16:15.16 |
-13:56:31.6 |
HIP 55095 |
34.92 |
| 2026-09-26 12:00 |
11:16:26.27 |
-13:58:58.1 |
HIP 55095 |
31.99 |
| 2026-09-27 00:00 |
11:16:37.34 |
-14:01:25.0 |
HIP 55095 |
29.21 |
| 2026-09-27 12:00 |
11:16:48.38 |
-14:03:52.1 |
HIP 55095 |
26.63 |
| 2026-09-28 00:00 |
11:16:59.39 |
-14:06:19.5 |
HIP 55095 |
24.32 |
| 2026-09-28 12:00 |
11:17:10.35 |
-14:08:47.2 |
HIP 55095 |
22.35 |
| 2026-09-29 00:00 |
11:17:21.28 |
-14:11:15.1 |
HIP 55095 |
20.82 |
| 2026-09-29 12:00 |
11:17:32.18 |
-14:13:43.3 |
HIP 55095 |
19.83 |
| 2026-09-30 00:00 |
11:17:43.03 |
-14:16:11.7 |
HIP 55095 |
19.46 |
| 2026-09-30 12:00 |
11:17:53.85 |
-14:18:40.4 |
HIP 55095 |
19.75 |
| 2026-10-01 00:00 |
11:18:04.62 |
-14:21:09.4 |
HIP 55095 |
20.66 |
| 2026-10-01 12:00 |
11:18:15.36 |
-14:23:38.6 |
HIP 55095 |
22.11 |
| 2026-10-02 00:00 |
11:18:26.06 |
-14:26:08.1 |
HIP 55095 |
24.01 |
| 2026-10-02 12:00 |
11:18:36.71 |
-14:28:37.8 |
HIP 55282 |
20.99 |
| 2026-10-03 00:00 |
11:18:47.32 |
-14:31:07.7 |
HIP 55282 |
17.56 |
| 2026-10-03 12:00 |
11:18:57.89 |
-14:33:37.9 |
HIP 55282 |
14.21 |
| 2026-10-04 00:00 |
11:19:08.42 |
-14:36:08.3 |
HIP 55282 |
11.00 |
| 2026-10-04 12:00 |
11:19:18.90 |
-14:38:38.9 |
HIP 55282 |
8.10 |
| 2026-10-05 00:00 |
11:19:29.34 |
-14:41:09.8 |
HIP 55282 |
5.97 |
| 2026-10-05 12:00 |
11:19:39.73 |
-14:43:40.9 |
HIP 55282 |
5.56 |
| 2026-10-06 00:00 |
11:19:50.07 |
-14:46:12.2 |
HIP 55282 |
7.16 |
| 2026-10-06 12:00 |
11:20:00.37 |
-14:48:43.7 |
HIP 55282 |
9.83 |
| 2026-10-07 00:00 |
11:20:10.62 |
-14:51:15.5 |
HIP 55282 |
12.92 |
| 2026-10-07 12:00 |
11:20:20.82 |
-14:53:47.4 |
HIP 55282 |
16.19 |
| 2026-10-08 00:00 |
11:20:30.97 |
-14:56:19.6 |
HIP 55282 |
19.54 |
| 2026-10-08 12:00 |
11:20:41.08 |
-14:58:51.9 |
HIP 55282 |
22.93 |
| 2026-10-09 00:00 |
11:20:51.12 |
-15:01:24.4 |
HIP 55282 |
26.35 |
| 2026-10-09 12:00 |
11:21:01.12 |
-15:03:57.1 |
HIP 55282 |
29.78 |
| 2026-10-10 00:00 |
11:21:11.07 |
-15:06:30.0 |
HIP 55282 |
33.22 |
| 2026-10-10 12:00 |
11:21:20.96 |
-15:09:03.1 |
HIP 55282 |
36.66 |
| 2026-10-11 00:00 |
11:21:30.80 |
-15:11:36.4 |
HIP 55579 |
38.09 |