| Parameter |
Value |
| Designation |
C/2024 C3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-11-07T22:23:00.450240Z |
| Orbit solution date (soln_date, UTC) |
2025-04-24T09:42:19Z |
| Obs used |
68 |
| NEO |
- |
| M1 |
7.200 |
| K1 |
12.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-09T11:11:24.518400Z |
| Discovery magnitude (MPC) |
21.70 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-03-24.0000000 |
| e |
0.42338622 |
| q (au) |
6.712614 |
| a (au) |
11.641438 |
| i (deg) |
22.466321 |
| Ω (om, deg) |
359.708122 |
| ω (w, deg) |
159.642989 |
| M (ma, deg) |
3.401169 |
Magnitude
Scatter + Global Linear
$$
M_a = (4.380 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
4.380 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.933 |
| k |
1.000 |
| δ90 |
10.000 |
| 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 |
13:51:11.04 |
-25:58:35.2 |
HIP 67458 |
32.31 |
| 2026-09-20 12:00 |
13:51:27.54 |
-25:59:57.4 |
HIP 67458 |
34.21 |
| 2026-09-21 00:00 |
13:51:44.09 |
-26:01:20.1 |
HIP 67458 |
36.45 |
| 2026-09-21 12:00 |
13:52:00.68 |
-26:02:43.3 |
HIP 67458 |
38.97 |
| 2026-09-22 00:00 |
13:52:17.32 |
-26:04:06.8 |
HIP 67458 |
41.71 |
| 2026-09-22 12:00 |
13:52:34.01 |
-26:05:30.9 |
HIP 67834 |
39.95 |
| 2026-09-23 00:00 |
13:52:50.75 |
-26:06:55.3 |
HIP 67834 |
37.33 |
| 2026-09-23 12:00 |
13:53:07.53 |
-26:08:20.2 |
HIP 67984 |
34.39 |
| 2026-09-24 00:00 |
13:53:24.36 |
-26:09:45.6 |
HIP 67984 |
30.43 |
| 2026-09-24 12:00 |
13:53:41.23 |
-26:11:11.4 |
HIP 67984 |
26.48 |
| 2026-09-25 00:00 |
13:53:58.15 |
-26:12:37.6 |
HIP 67984 |
22.55 |
| 2026-09-25 12:00 |
13:54:15.11 |
-26:14:04.2 |
HIP 67984 |
18.66 |
| 2026-09-26 00:00 |
13:54:32.12 |
-26:15:31.3 |
HIP 67984 |
14.85 |
| 2026-09-26 12:00 |
13:54:49.17 |
-26:16:58.7 |
HIP 67984 |
11.23 |
| 2026-09-27 00:00 |
13:55:06.26 |
-26:18:26.6 |
HIP 67984 |
8.06 |
| 2026-09-27 12:00 |
13:55:23.39 |
-26:19:54.9 |
HIP 67984 |
6.10 |
| 2026-09-28 00:00 |
13:55:40.56 |
-26:21:23.7 |
HIP 67984 |
6.58 |
| 2026-09-28 12:00 |
13:55:57.78 |
-26:22:52.8 |
HIP 67984 |
9.14 |
| 2026-09-29 00:00 |
13:56:15.03 |
-26:24:22.4 |
HIP 67984 |
12.57 |
| 2026-09-29 12:00 |
13:56:32.33 |
-26:25:52.3 |
HIP 67984 |
16.34 |
| 2026-09-30 00:00 |
13:56:49.66 |
-26:27:22.7 |
HIP 67984 |
20.27 |
| 2026-09-30 12:00 |
13:57:07.04 |
-26:28:53.4 |
HIP 67984 |
24.28 |
| 2026-10-01 00:00 |
13:57:24.45 |
-26:30:24.6 |
HIP 68289 |
20.59 |
| 2026-10-01 12:00 |
13:57:41.90 |
-26:31:56.1 |
HIP 68289 |
16.44 |
| 2026-10-02 00:00 |
13:57:59.39 |
-26:33:28.1 |
HIP 68289 |
12.31 |
| 2026-10-02 12:00 |
13:58:16.91 |
-26:35:00.4 |
HIP 68289 |
8.24 |
| 2026-10-03 00:00 |
13:58:34.47 |
-26:36:33.1 |
HIP 68289 |
4.42 |
| 2026-10-03 12:00 |
13:58:52.07 |
-26:38:06.3 |
HIP 68289 |
2.62 |
| 2026-10-04 00:00 |
13:59:09.70 |
-26:39:39.8 |
HIP 68289 |
5.48 |
| 2026-10-04 12:00 |
13:59:27.37 |
-26:41:13.6 |
HIP 68374 |
4.80 |
| 2026-10-05 00:00 |
13:59:45.08 |
-26:42:47.9 |
HIP 68374 |
4.13 |
| 2026-10-05 12:00 |
14:00:02.81 |
-26:44:22.5 |
HIP 68374 |
6.89 |
| 2026-10-06 00:00 |
14:00:20.58 |
-26:45:57.5 |
HIP 68374 |
10.69 |
| 2026-10-06 12:00 |
14:00:38.38 |
-26:47:32.9 |
HIP 68374 |
14.76 |
| 2026-10-07 00:00 |
14:00:56.22 |
-26:49:08.7 |
HIP 68374 |
18.94 |
| 2026-10-07 12:00 |
14:01:14.08 |
-26:50:44.8 |
HIP 68608 |
18.85 |
| 2026-10-08 00:00 |
14:01:31.98 |
-26:52:21.3 |
HIP 68608 |
14.93 |
| 2026-10-08 12:00 |
14:01:49.91 |
-26:53:58.1 |
HIP 68608 |
11.29 |
| 2026-10-09 00:00 |
14:02:07.87 |
-26:55:35.3 |
HIP 68608 |
8.32 |
| 2026-10-09 12:00 |
14:02:25.85 |
-26:57:12.8 |
HIP 68608 |
6.95 |
| 2026-10-10 00:00 |
14:02:43.87 |
-26:58:50.7 |
HIP 68608 |
8.06 |
| 2026-10-10 12:00 |
14:03:01.91 |
-27:00:29.0 |
HIP 68688 |
7.91 |
| 2026-10-11 00:00 |
14:03:19.98 |
-27:02:07.6 |
HIP 68688 |
4.18 |