| 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) |
| 2026-06-01 00:00 |
10:43:17.59 |
-08:29:50.2 |
HIP 52385 |
18.57 |
| 2026-06-01 12:00 |
10:43:15.82 |
-08:29:44.5 |
HIP 52385 |
18.36 |
| 2026-06-02 00:00 |
10:43:14.22 |
-08:29:39.6 |
HIP 52385 |
18.16 |
| 2026-06-02 12:00 |
10:43:12.79 |
-08:29:35.7 |
HIP 52385 |
17.99 |
| 2026-06-03 00:00 |
10:43:11.51 |
-08:29:32.8 |
HIP 52385 |
17.83 |
| 2026-06-03 12:00 |
10:43:10.39 |
-08:29:30.7 |
HIP 52385 |
17.69 |
| 2026-06-04 00:00 |
10:43:09.43 |
-08:29:29.6 |
HIP 52385 |
17.56 |
| 2026-06-04 12:00 |
10:43:08.63 |
-08:29:29.5 |
HIP 52385 |
17.45 |
| 2026-06-05 00:00 |
10:43:07.98 |
-08:29:30.2 |
HIP 52385 |
17.34 |
| 2026-06-05 12:00 |
10:43:07.50 |
-08:29:32.0 |
HIP 52385 |
17.25 |
| 2026-06-06 00:00 |
10:43:07.16 |
-08:29:34.6 |
HIP 52385 |
17.17 |
| 2026-06-06 12:00 |
10:43:06.98 |
-08:29:38.2 |
HIP 52385 |
17.09 |
| 2026-06-07 00:00 |
10:43:06.95 |
-08:29:42.7 |
HIP 52385 |
17.03 |
| 2026-06-07 12:00 |
10:43:07.08 |
-08:29:48.1 |
HIP 52385 |
16.97 |
| 2026-06-08 00:00 |
10:43:07.35 |
-08:29:54.5 |
HIP 52385 |
16.92 |
| 2026-06-08 12:00 |
10:43:07.77 |
-08:30:01.8 |
HIP 52385 |
16.89 |
| 2026-06-09 00:00 |
10:43:08.34 |
-08:30:10.0 |
HIP 52385 |
16.86 |
| 2026-06-09 12:00 |
10:43:09.06 |
-08:30:19.2 |
HIP 52385 |
16.85 |
| 2026-06-10 00:00 |
10:43:09.93 |
-08:30:29.2 |
HIP 52385 |
16.85 |
| 2026-06-10 12:00 |
10:43:10.94 |
-08:30:40.3 |
HIP 52385 |
16.87 |
| 2026-06-11 00:00 |
10:43:12.10 |
-08:30:52.2 |
HIP 52385 |
16.90 |
| 2026-06-11 12:00 |
10:43:13.40 |
-08:31:05.1 |
HIP 52385 |
16.95 |
| 2026-06-12 00:00 |
10:43:14.84 |
-08:31:18.9 |
HIP 52385 |
17.03 |
| 2026-06-12 12:00 |
10:43:16.42 |
-08:31:33.6 |
HIP 52385 |
17.12 |
| 2026-06-13 00:00 |
10:43:18.15 |
-08:31:49.3 |
HIP 52385 |
17.25 |
| 2026-06-13 12:00 |
10:43:20.01 |
-08:32:05.9 |
HIP 52385 |
17.40 |
| 2026-06-14 00:00 |
10:43:22.01 |
-08:32:23.4 |
HIP 52385 |
17.59 |
| 2026-06-14 12:00 |
10:43:24.15 |
-08:32:41.8 |
HIP 52385 |
17.81 |
| 2026-06-15 00:00 |
10:43:26.42 |
-08:33:01.2 |
HIP 52385 |
18.06 |
| 2026-06-15 12:00 |
10:43:28.83 |
-08:33:21.4 |
HIP 52385 |
18.36 |
| 2026-06-16 00:00 |
10:43:31.38 |
-08:33:42.6 |
HIP 52385 |
18.69 |
| 2026-06-16 12:00 |
10:43:34.06 |
-08:34:04.8 |
HIP 52385 |
19.07 |
| 2026-06-17 00:00 |
10:43:36.86 |
-08:34:27.8 |
HIP 52385 |
19.49 |
| 2026-06-17 12:00 |
10:43:39.80 |
-08:34:51.7 |
HIP 52385 |
19.95 |
| 2026-06-18 00:00 |
10:43:42.87 |
-08:35:16.6 |
HIP 52385 |
20.47 |
| 2026-06-18 12:00 |
10:43:46.07 |
-08:35:42.4 |
HIP 52385 |
21.02 |
| 2026-06-19 00:00 |
10:43:49.39 |
-08:36:09.0 |
HIP 52385 |
21.63 |
| 2026-06-19 12:00 |
10:43:52.84 |
-08:36:36.6 |
HIP 52385 |
22.28 |
| 2026-06-20 00:00 |
10:43:56.41 |
-08:37:05.1 |
HIP 52385 |
22.98 |
| 2026-06-20 12:00 |
10:44:00.11 |
-08:37:34.5 |
HIP 52385 |
23.73 |
| 2026-06-21 00:00 |
10:44:03.93 |
-08:38:04.8 |
HIP 52385 |
24.52 |
| 2026-06-21 12:00 |
10:44:07.87 |
-08:38:35.9 |
HIP 52385 |
25.36 |
| 2026-06-22 00:00 |
10:44:11.93 |
-08:39:08.0 |
HIP 52385 |
26.25 |