| Parameter |
Value |
| Designation |
C/2024 L2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-06-18T08:21:57.674880Z |
| Orbit solution date (soln_date, UTC) |
2026-06-09T11:12:29Z |
| Obs used |
33 |
| NEO |
- |
| M1 |
5.800 |
| 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) |
2024-05-10.0000000 |
| e |
1.00412282 |
| q (au) |
8.325842 |
| a (au) |
-2019.452707 |
| i (deg) |
139.583734 |
| Ω (om, deg) |
266.182675 |
| ω (w, deg) |
345.940804 |
| M (ma, deg) |
-0.004391 |
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) |
| 2026-07-29 00:00 |
16:54:10.64 |
-16:19:25.6 |
HIP 82684 |
5.29 |
| 2026-07-29 12:00 |
16:53:56.37 |
-16:18:14.2 |
HIP 82684 |
6.59 |
| 2026-07-30 00:00 |
16:53:42.23 |
-16:17:03.2 |
HIP 82684 |
9.20 |
| 2026-07-30 12:00 |
16:53:28.22 |
-16:15:52.5 |
HIP 82581 |
8.82 |
| 2026-07-31 00:00 |
16:53:14.34 |
-16:14:42.3 |
HIP 82581 |
5.34 |
| 2026-07-31 12:00 |
16:53:00.59 |
-16:13:32.4 |
HIP 82581 |
2.06 |
| 2026-08-01 00:00 |
16:52:46.97 |
-16:12:22.8 |
HIP 82581 |
2.08 |
| 2026-08-01 12:00 |
16:52:33.49 |
-16:11:13.7 |
HIP 82581 |
5.31 |
| 2026-08-02 00:00 |
16:52:20.13 |
-16:10:04.9 |
HIP 82581 |
8.67 |
| 2026-08-02 12:00 |
16:52:06.91 |
-16:08:56.5 |
HIP 82581 |
12.02 |
| 2026-08-03 00:00 |
16:51:53.82 |
-16:07:48.4 |
HIP 82581 |
15.35 |
| 2026-08-03 12:00 |
16:51:40.86 |
-16:06:40.8 |
HIP 82536 |
15.98 |
| 2026-08-04 00:00 |
16:51:28.04 |
-16:05:33.5 |
HIP 82536 |
16.91 |
| 2026-08-04 12:00 |
16:51:15.35 |
-16:04:26.6 |
HIP 82536 |
18.37 |
| 2026-08-05 00:00 |
16:51:02.79 |
-16:03:20.1 |
HIP 82536 |
20.23 |
| 2026-08-05 12:00 |
16:50:50.37 |
-16:02:13.9 |
HIP 82536 |
22.37 |
| 2026-08-06 00:00 |
16:50:38.08 |
-16:01:08.2 |
HIP 82536 |
24.70 |
| 2026-08-06 12:00 |
16:50:25.93 |
-16:00:02.8 |
HIP 82339 |
24.39 |
| 2026-08-07 00:00 |
16:50:13.91 |
-15:58:57.8 |
HIP 82339 |
21.92 |
| 2026-08-07 12:00 |
16:50:02.03 |
-15:57:53.2 |
HIP 82339 |
19.63 |
| 2026-08-08 00:00 |
16:49:50.28 |
-15:56:49.0 |
HIP 82339 |
17.60 |
| 2026-08-08 12:00 |
16:49:38.67 |
-15:55:45.2 |
HIP 82339 |
15.90 |
| 2026-08-09 00:00 |
16:49:27.20 |
-15:54:41.8 |
HIP 82283 |
14.37 |
| 2026-08-09 12:00 |
16:49:15.86 |
-15:53:38.7 |
HIP 82283 |
11.79 |
| 2026-08-10 00:00 |
16:49:04.66 |
-15:52:36.1 |
HIP 82283 |
9.44 |
| 2026-08-10 12:00 |
16:48:53.60 |
-15:51:33.8 |
HIP 82283 |
7.49 |
| 2026-08-11 00:00 |
16:48:42.68 |
-15:50:31.9 |
HIP 82283 |
6.28 |
| 2026-08-11 12:00 |
16:48:31.89 |
-15:49:30.4 |
HIP 82283 |
6.21 |
| 2026-08-12 00:00 |
16:48:21.24 |
-15:48:29.3 |
HIP 82283 |
7.27 |
| 2026-08-12 12:00 |
16:48:10.73 |
-15:47:28.6 |
HIP 82283 |
9.05 |
| 2026-08-13 00:00 |
16:48:00.36 |
-15:46:28.2 |
HIP 82283 |
11.18 |
| 2026-08-13 12:00 |
16:47:50.12 |
-15:45:28.3 |
HIP 82233 |
12.67 |
| 2026-08-14 00:00 |
16:47:40.03 |
-15:44:28.7 |
HIP 82233 |
14.33 |
| 2026-08-14 12:00 |
16:47:30.07 |
-15:43:29.6 |
HIP 82233 |
16.24 |
| 2026-08-15 00:00 |
16:47:20.25 |
-15:42:30.8 |
HIP 82233 |
18.28 |
| 2026-08-15 12:00 |
16:47:10.57 |
-15:41:32.4 |
HIP 82233 |
20.42 |
| 2026-08-16 00:00 |
16:47:01.03 |
-15:40:34.3 |
HIP 82233 |
22.61 |
| 2026-08-16 12:00 |
16:46:51.62 |
-15:39:36.7 |
HIP 82233 |
24.83 |
| 2026-08-17 00:00 |
16:46:42.36 |
-15:38:39.4 |
HIP 82233 |
27.06 |
| 2026-08-17 12:00 |
16:46:33.23 |
-15:37:42.6 |
HIP 81980 |
26.24 |
| 2026-08-18 00:00 |
16:46:24.24 |
-15:36:46.1 |
HIP 81980 |
23.89 |
| 2026-08-18 12:00 |
16:46:15.39 |
-15:35:49.9 |
HIP 81980 |
21.58 |
| 2026-08-19 00:00 |
16:46:06.67 |
-15:34:54.2 |
HIP 81980 |
19.31 |