| Parameter |
Value |
| Designation |
C/2024 L1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-04-23T13:04:04.661760Z |
| Orbit solution date (soln_date, UTC) |
2025-08-12T09:42:16Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
14.300 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-01T07:04:12.230400Z |
| Discovery magnitude (MPC) |
21.19 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-08-09.0000000 |
| e |
0.53343848 |
| q (au) |
5.347870 |
| a (au) |
11.462305 |
| i (deg) |
99.174449 |
| Ω (om, deg) |
45.136998 |
| ω (w, deg) |
171.833347 |
| M (ma, deg) |
353.458935 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.968 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.968 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
12:53:57.70 |
-42:57:19.9 |
HIP 62907 |
8.43 |
| 2026-09-20 12:00 |
12:54:11.23 |
-42:59:27.7 |
HIP 62907 |
8.55 |
| 2026-09-21 00:00 |
12:54:24.82 |
-43:01:36.7 |
HIP 62907 |
9.82 |
| 2026-09-21 12:00 |
12:54:38.45 |
-43:03:46.9 |
HIP 63066 |
11.59 |
| 2026-09-22 00:00 |
12:54:52.13 |
-43:05:58.3 |
HIP 63066 |
12.11 |
| 2026-09-22 12:00 |
12:55:05.86 |
-43:08:10.9 |
HIP 63066 |
13.47 |
| 2026-09-23 00:00 |
12:55:19.64 |
-43:10:24.8 |
HIP 63066 |
15.47 |
| 2026-09-23 12:00 |
12:55:33.47 |
-43:12:39.8 |
HIP 63148 |
16.32 |
| 2026-09-24 00:00 |
12:55:47.35 |
-43:14:56.1 |
HIP 63148 |
13.09 |
| 2026-09-24 12:00 |
12:56:01.27 |
-43:17:13.5 |
HIP 63148 |
9.94 |
| 2026-09-25 00:00 |
12:56:15.24 |
-43:19:32.1 |
HIP 63148 |
7.02 |
| 2026-09-25 12:00 |
12:56:29.25 |
-43:21:52.0 |
HIP 63148 |
4.83 |
| 2026-09-26 00:00 |
12:56:43.30 |
-43:24:13.0 |
HIP 63148 |
4.58 |
| 2026-09-26 12:00 |
12:56:57.39 |
-43:26:35.2 |
HIP 63148 |
6.55 |
| 2026-09-27 00:00 |
12:57:11.53 |
-43:28:58.6 |
HIP 63223 |
6.62 |
| 2026-09-27 12:00 |
12:57:25.71 |
-43:31:23.2 |
HIP 63223 |
4.45 |
| 2026-09-28 00:00 |
12:57:39.92 |
-43:33:49.0 |
HIP 63223 |
4.54 |
| 2026-09-28 12:00 |
12:57:54.18 |
-43:36:15.9 |
HIP 63223 |
6.83 |
| 2026-09-29 00:00 |
12:58:08.47 |
-43:38:44.0 |
HIP 63223 |
9.91 |
| 2026-09-29 12:00 |
12:58:22.80 |
-43:41:13.3 |
HIP 63375 |
8.31 |
| 2026-09-30 00:00 |
12:58:37.16 |
-43:43:43.7 |
HIP 63375 |
5.84 |
| 2026-09-30 12:00 |
12:58:51.57 |
-43:46:15.4 |
HIP 63375 |
5.04 |
| 2026-10-01 00:00 |
12:59:06.00 |
-43:48:48.1 |
HIP 63375 |
6.58 |
| 2026-10-01 12:00 |
12:59:20.47 |
-43:51:22.1 |
HIP 63412 |
3.22 |
| 2026-10-02 00:00 |
12:59:34.97 |
-43:53:57.2 |
HIP 63412 |
1.72 |
| 2026-10-02 12:00 |
12:59:49.51 |
-43:56:33.5 |
HIP 63412 |
4.77 |
| 2026-10-03 00:00 |
13:00:04.07 |
-43:59:10.9 |
HIP 63412 |
8.37 |
| 2026-10-03 12:00 |
13:00:18.67 |
-44:01:49.5 |
HIP 63412 |
12.06 |
| 2026-10-04 00:00 |
13:00:33.29 |
-44:04:29.3 |
HIP 63412 |
15.78 |
| 2026-10-04 12:00 |
13:00:47.94 |
-44:07:10.2 |
HIP 63412 |
19.53 |
| 2026-10-05 00:00 |
13:01:02.62 |
-44:09:52.2 |
HIP 63412 |
23.29 |
| 2026-10-05 12:00 |
13:01:17.33 |
-44:12:35.4 |
HIP 63412 |
27.08 |
| 2026-10-06 00:00 |
13:01:32.06 |
-44:15:19.7 |
HIP 63704 |
26.39 |
| 2026-10-06 12:00 |
13:01:46.81 |
-44:18:05.2 |
HIP 63704 |
22.58 |
| 2026-10-07 00:00 |
13:02:01.59 |
-44:20:51.9 |
HIP 63704 |
18.75 |
| 2026-10-07 12:00 |
13:02:16.39 |
-44:23:39.6 |
HIP 63704 |
14.91 |
| 2026-10-08 00:00 |
13:02:31.21 |
-44:26:28.5 |
HIP 63704 |
11.06 |
| 2026-10-08 12:00 |
13:02:46.05 |
-44:29:18.6 |
HIP 63704 |
7.21 |
| 2026-10-09 00:00 |
13:03:00.90 |
-44:32:09.7 |
HIP 63704 |
3.42 |
| 2026-10-09 12:00 |
13:03:15.78 |
-44:35:02.0 |
HIP 63704 |
1.33 |
| 2026-10-10 00:00 |
13:03:30.67 |
-44:37:55.4 |
HIP 63704 |
4.75 |
| 2026-10-10 12:00 |
13:03:45.58 |
-44:40:50.0 |
HIP 63704 |
8.63 |
| 2026-10-11 00:00 |
13:04:00.50 |
-44:43:45.6 |
HIP 63704 |
12.55 |