| Parameter |
Value |
| Designation |
C/2024 L2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-06-17T18:05:30.808320Z |
| Orbit solution date (soln_date, UTC) |
2026-08-07T12:42:14Z |
| Obs used |
39 |
| NEO |
- |
| M1 |
6.100 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-13T12:42:08.496000Z |
| Discovery magnitude (MPC) |
20.48 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-09-29.0000000 |
| e |
1.00341037 |
| q (au) |
8.326328 |
| a (au) |
-2441.475042 |
| i (deg) |
139.586686 |
| Ω (om, deg) |
266.179571 |
| ω (w, deg) |
345.901098 |
| M (ma, deg) |
-0.002139 |
Magnitude
Scatter + Global Linear
$$
M_a = (0.255 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
0.255 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.505 |
| 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 |
16:41:22.25 |
-14:47:17.5 |
HIP 81610 |
21.04 |
| 2026-09-20 12:00 |
16:41:21.80 |
-14:46:42.3 |
HIP 81610 |
20.68 |
| 2026-09-21 00:00 |
16:41:21.46 |
-14:46:07.4 |
HIP 81610 |
20.36 |
| 2026-09-21 12:00 |
16:41:21.24 |
-14:45:32.7 |
HIP 81610 |
20.08 |
| 2026-09-22 00:00 |
16:41:21.12 |
-14:44:58.2 |
HIP 81610 |
19.84 |
| 2026-09-22 12:00 |
16:41:21.11 |
-14:44:24.0 |
HIP 81610 |
19.64 |
| 2026-09-23 00:00 |
16:41:21.21 |
-14:43:49.9 |
HIP 81610 |
19.48 |
| 2026-09-23 12:00 |
16:41:21.42 |
-14:43:16.1 |
HIP 81610 |
19.37 |
| 2026-09-24 00:00 |
16:41:21.73 |
-14:42:42.5 |
HIP 81610 |
19.29 |
| 2026-09-24 12:00 |
16:41:22.15 |
-14:42:09.1 |
HIP 81610 |
19.26 |
| 2026-09-25 00:00 |
16:41:22.68 |
-14:41:35.9 |
HIP 81610 |
19.26 |
| 2026-09-25 12:00 |
16:41:23.32 |
-14:41:02.9 |
HIP 81610 |
19.32 |
| 2026-09-26 00:00 |
16:41:24.05 |
-14:40:30.1 |
HIP 81610 |
19.41 |
| 2026-09-26 12:00 |
16:41:24.90 |
-14:39:57.4 |
HIP 81610 |
19.54 |
| 2026-09-27 00:00 |
16:41:25.84 |
-14:39:25.0 |
HIP 81610 |
19.72 |
| 2026-09-27 12:00 |
16:41:26.89 |
-14:38:52.8 |
HIP 81610 |
19.94 |
| 2026-09-28 00:00 |
16:41:28.04 |
-14:38:20.7 |
HIP 81610 |
20.20 |
| 2026-09-28 12:00 |
16:41:29.30 |
-14:37:48.9 |
HIP 81610 |
20.49 |
| 2026-09-29 00:00 |
16:41:30.65 |
-14:37:17.2 |
HIP 81610 |
20.83 |
| 2026-09-29 12:00 |
16:41:32.11 |
-14:36:45.7 |
HIP 81610 |
21.20 |
| 2026-09-30 00:00 |
16:41:33.66 |
-14:36:14.3 |
HIP 81610 |
21.61 |
| 2026-09-30 12:00 |
16:41:35.31 |
-14:35:43.1 |
HIP 81610 |
22.05 |
| 2026-10-01 00:00 |
16:41:37.07 |
-14:35:12.1 |
HIP 81610 |
22.53 |
| 2026-10-01 12:00 |
16:41:38.92 |
-14:34:41.3 |
HIP 81610 |
23.04 |
| 2026-10-02 00:00 |
16:41:40.87 |
-14:34:10.6 |
HIP 81610 |
23.58 |
| 2026-10-02 12:00 |
16:41:42.91 |
-14:33:40.1 |
HIP 81610 |
24.15 |
| 2026-10-03 00:00 |
16:41:45.06 |
-14:33:09.7 |
HIP 81610 |
24.75 |
| 2026-10-03 12:00 |
16:41:47.29 |
-14:32:39.5 |
HIP 81610 |
25.38 |
| 2026-10-04 00:00 |
16:41:49.63 |
-14:32:09.4 |
HIP 81610 |
26.04 |
| 2026-10-04 12:00 |
16:41:52.06 |
-14:31:39.4 |
HIP 81610 |
26.72 |
| 2026-10-05 00:00 |
16:41:54.58 |
-14:31:09.6 |
HIP 81610 |
27.43 |
| 2026-10-05 12:00 |
16:41:57.19 |
-14:30:40.0 |
HIP 81610 |
28.17 |
| 2026-10-06 00:00 |
16:41:59.90 |
-14:30:10.4 |
HIP 81610 |
28.93 |
| 2026-10-06 12:00 |
16:42:02.70 |
-14:29:41.0 |
HIP 81610 |
29.72 |
| 2026-10-07 00:00 |
16:42:05.60 |
-14:29:11.8 |
HIP 81610 |
30.52 |
| 2026-10-07 12:00 |
16:42:08.58 |
-14:28:42.6 |
HIP 81610 |
31.36 |
| 2026-10-08 00:00 |
16:42:11.65 |
-14:28:13.6 |
HIP 81870 |
30.78 |
| 2026-10-08 12:00 |
16:42:14.81 |
-14:27:44.6 |
HIP 81870 |
29.97 |
| 2026-10-09 00:00 |
16:42:18.07 |
-14:27:15.8 |
HIP 81870 |
29.15 |
| 2026-10-09 12:00 |
16:42:21.41 |
-14:26:47.1 |
HIP 81870 |
28.33 |
| 2026-10-10 00:00 |
16:42:24.83 |
-14:26:18.5 |
HIP 81870 |
27.51 |
| 2026-10-10 12:00 |
16:42:28.35 |
-14:25:50.0 |
HIP 81870 |
26.70 |
| 2026-10-11 00:00 |
16:42:31.94 |
-14:25:21.6 |
HIP 81870 |
25.88 |