C/2024 PN7 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
12:05:55.82 |
-11:13:33.4 |
HIP 58894 |
24.68 |
| 2026-02-03 12:00 |
12:05:31.60 |
-11:14:21.4 |
HIP 58894 |
20.12 |
| 2026-02-04 00:00 |
12:05:07.18 |
-11:15:07.9 |
HIP 58894 |
16.50 |
| 2026-02-04 12:00 |
12:04:42.57 |
-11:15:52.8 |
HIP 58894 |
14.61 |
| 2026-02-05 00:00 |
12:04:17.77 |
-11:16:36.2 |
HIP 58894 |
15.16 |
| 2026-02-05 12:00 |
12:03:52.79 |
-11:17:18.1 |
HIP 58894 |
17.97 |
| 2026-02-06 00:00 |
12:03:27.62 |
-11:17:58.4 |
HIP 58894 |
22.23 |
| 2026-02-06 12:00 |
12:03:02.28 |
-11:18:37.1 |
HIP 58894 |
27.29 |
| 2026-02-07 00:00 |
12:02:36.75 |
-11:19:14.3 |
HIP 58894 |
32.82 |
| 2026-02-07 12:00 |
12:02:11.05 |
-11:19:50.0 |
HIP 58704 |
36.41 |
| 2026-02-08 00:00 |
12:01:45.17 |
-11:20:24.1 |
HIP 58704 |
37.06 |
| 2026-02-08 12:00 |
12:01:19.12 |
-11:20:56.7 |
HIP 58704 |
38.79 |
| 2026-02-09 00:00 |
12:00:52.90 |
-11:21:27.7 |
HIP 58407 |
36.81 |
| 2026-02-09 12:00 |
12:00:26.51 |
-11:21:57.1 |
HIP 58407 |
30.64 |
| 2026-02-10 00:00 |
11:59:59.96 |
-11:22:25.0 |
HIP 58407 |
24.62 |
| 2026-02-10 12:00 |
11:59:33.24 |
-11:22:51.3 |
HIP 58407 |
18.92 |
| 2026-02-11 00:00 |
11:59:06.37 |
-11:23:16.1 |
HIP 58407 |
14.00 |
| 2026-02-11 12:00 |
11:58:39.33 |
-11:23:39.3 |
HIP 58407 |
11.01 |
| 2026-02-12 00:00 |
11:58:12.14 |
-11:24:00.9 |
HIP 58407 |
11.64 |
| 2026-02-12 12:00 |
11:57:44.80 |
-11:24:21.0 |
HIP 58407 |
15.50 |
| 2026-02-13 00:00 |
11:57:17.31 |
-11:24:39.5 |
HIP 58407 |
20.89 |
| 2026-02-13 12:00 |
11:56:49.68 |
-11:24:56.5 |
HIP 58304 |
24.71 |
| 2026-02-14 00:00 |
11:56:21.90 |
-11:25:11.9 |
HIP 58304 |
27.51 |
| 2026-02-14 12:00 |
11:55:53.98 |
-11:25:25.8 |
HIP 58081 |
28.65 |
| 2026-02-15 00:00 |
11:55:25.92 |
-11:25:38.1 |
HIP 58081 |
25.15 |
| 2026-02-15 12:00 |
11:54:57.73 |
-11:25:48.9 |
HIP 58081 |
23.19 |
| 2026-02-16 00:00 |
11:54:29.40 |
-11:25:58.1 |
HIP 58081 |
23.18 |
| 2026-02-16 12:00 |
11:54:00.95 |
-11:26:05.8 |
HIP 58081 |
25.16 |
| 2026-02-17 00:00 |
11:53:32.38 |
-11:26:12.0 |
HIP 57869 |
21.53 |
| 2026-02-17 12:00 |
11:53:03.68 |
-11:26:16.6 |
HIP 57869 |
15.20 |
| 2026-02-18 00:00 |
11:52:34.86 |
-11:26:19.7 |
HIP 57869 |
9.82 |
| 2026-02-18 12:00 |
11:52:05.93 |
-11:26:21.3 |
HIP 57869 |
7.84 |
| 2026-02-19 00:00 |
11:51:36.89 |
-11:26:21.3 |
HIP 57869 |
11.27 |
| 2026-02-19 12:00 |
11:51:07.73 |
-11:26:19.9 |
HIP 57800 |
13.87 |
| 2026-02-20 00:00 |
11:50:38.48 |
-11:26:16.9 |
HIP 57800 |
15.42 |
| 2026-02-20 12:00 |
11:50:09.12 |
-11:26:12.5 |
HIP 57800 |
19.66 |
| 2026-02-21 00:00 |
11:49:39.67 |
-11:26:06.6 |
HIP 57712 |
24.40 |
| 2026-02-21 12:00 |
11:49:10.12 |
-11:25:59.2 |
HIP 57712 |
27.25 |
| 2026-02-22 00:00 |
11:48:40.48 |
-11:25:50.3 |
HIP 57712 |
31.54 |
| 2026-02-22 12:00 |
11:48:10.75 |
-11:25:40.0 |
HIP 57494 |
28.85 |
| 2026-02-23 00:00 |
11:47:40.94 |
-11:25:28.2 |
HIP 57494 |
25.62 |
| 2026-02-23 12:00 |
11:47:11.05 |
-11:25:15.0 |
HIP 57494 |
24.25 |
| 2026-02-24 00:00 |
11:46:41.09 |
-11:25:00.4 |
HIP 57494 |
25.06 |