| 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) |
| 2026-03-26 00:00 |
11:16:42.21 |
-10:34:49.4 |
HIP 55027 |
11.63 |
| 2026-03-26 12:00 |
11:16:14.45 |
-10:33:34.2 |
HIP 55027 |
5.72 |
| 2026-03-27 00:00 |
11:15:46.83 |
-10:32:18.6 |
HIP 55027 |
5.14 |
| 2026-03-27 12:00 |
11:15:19.35 |
-10:31:02.6 |
HIP 55027 |
10.72 |
| 2026-03-28 00:00 |
11:14:52.02 |
-10:29:46.2 |
HIP 55027 |
17.23 |
| 2026-03-28 12:00 |
11:14:24.83 |
-10:28:29.5 |
HIP 55027 |
23.89 |
| 2026-03-29 00:00 |
11:13:57.80 |
-10:27:12.5 |
HIP 54737 |
29.35 |
| 2026-03-29 12:00 |
11:13:30.92 |
-10:25:55.1 |
HIP 54737 |
23.61 |
| 2026-03-30 00:00 |
11:13:04.19 |
-10:24:37.5 |
HIP 54737 |
18.58 |
| 2026-03-30 12:00 |
11:12:37.61 |
-10:23:19.6 |
HIP 54737 |
14.92 |
| 2026-03-31 00:00 |
11:12:11.20 |
-10:22:01.4 |
HIP 54737 |
13.73 |
| 2026-03-31 12:00 |
11:11:44.95 |
-10:20:43.0 |
HIP 54737 |
15.53 |
| 2026-04-01 00:00 |
11:11:18.86 |
-10:19:24.4 |
HIP 54737 |
19.48 |
| 2026-04-01 12:00 |
11:10:52.93 |
-10:18:05.6 |
HIP 54569 |
13.63 |
| 2026-04-02 00:00 |
11:10:27.18 |
-10:16:46.6 |
HIP 54569 |
7.26 |
| 2026-04-02 12:00 |
11:10:01.59 |
-10:15:27.5 |
HIP 54569 |
1.92 |
| 2026-04-03 00:00 |
11:09:36.17 |
-10:14:08.2 |
HIP 54569 |
6.07 |
| 2026-04-03 12:00 |
11:09:10.92 |
-10:12:48.8 |
HIP 54531 |
12.03 |
| 2026-04-04 00:00 |
11:08:45.85 |
-10:11:29.3 |
HIP 54531 |
16.54 |
| 2026-04-04 12:00 |
11:08:20.96 |
-10:10:09.7 |
HIP 54363 |
15.46 |
| 2026-04-05 00:00 |
11:07:56.25 |
-10:08:50.0 |
HIP 54363 |
10.09 |
| 2026-04-05 12:00 |
11:07:31.71 |
-10:07:30.4 |
HIP 54363 |
6.51 |
| 2026-04-06 00:00 |
11:07:07.36 |
-10:06:10.6 |
HIP 54350 |
2.76 |
| 2026-04-06 12:00 |
11:06:43.19 |
-10:04:50.9 |
HIP 54350 |
6.72 |
| 2026-04-07 00:00 |
11:06:19.21 |
-10:03:31.2 |
HIP 54350 |
12.49 |
| 2026-04-07 12:00 |
11:05:55.41 |
-10:02:11.5 |
HIP 54195 |
18.22 |
| 2026-04-08 00:00 |
11:05:31.80 |
-10:00:51.8 |
HIP 54195 |
17.11 |
| 2026-04-08 12:00 |
11:05:08.38 |
-09:59:32.3 |
HIP 54195 |
18.02 |
| 2026-04-09 00:00 |
11:04:45.15 |
-09:58:12.8 |
HIP 54195 |
20.63 |
| 2026-04-09 12:00 |
11:04:22.12 |
-09:56:53.3 |
HIP 54195 |
24.37 |
| 2026-04-10 00:00 |
11:03:59.28 |
-09:55:34.1 |
HIP 53975 |
22.06 |
| 2026-04-10 12:00 |
11:03:36.63 |
-09:54:14.9 |
HIP 53975 |
16.99 |
| 2026-04-11 00:00 |
11:03:14.18 |
-09:52:55.9 |
HIP 53975 |
12.54 |
| 2026-04-11 12:00 |
11:02:51.93 |
-09:51:37.0 |
HIP 53975 |
9.54 |
| 2026-04-12 00:00 |
11:02:29.88 |
-09:50:18.4 |
HIP 53926 |
6.55 |
| 2026-04-12 12:00 |
11:02:08.03 |
-09:49:00.0 |
HIP 53926 |
2.81 |
| 2026-04-13 00:00 |
11:01:46.38 |
-09:47:41.7 |
HIP 53926 |
5.82 |
| 2026-04-13 12:00 |
11:01:24.94 |
-09:46:23.7 |
HIP 53868 |
2.46 |
| 2026-04-14 00:00 |
11:01:03.70 |
-09:45:06.0 |
HIP 53868 |
3.03 |
| 2026-04-14 12:00 |
11:00:42.66 |
-09:43:48.5 |
HIP 53868 |
8.34 |
| 2026-04-15 00:00 |
11:00:21.84 |
-09:42:31.3 |
HIP 53794 |
12.96 |
| 2026-04-15 12:00 |
11:00:01.21 |
-09:41:14.5 |
HIP 53794 |
12.80 |
| 2026-04-16 00:00 |
10:59:40.80 |
-09:39:57.9 |
HIP 53794 |
14.63 |