| Parameter |
Value |
| Designation |
C/2024 L3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-11-24T09:49:27.088320Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:13Z |
| Obs used |
34 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-06-07T11:28:43.910400Z |
| Discovery magnitude (MPC) |
22.49 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-06-04.0000000 |
| e |
1.00558885 |
| q (au) |
6.858505 |
| a (au) |
-1227.177282 |
| i (deg) |
111.592112 |
| Ω (om, deg) |
294.984392 |
| ω (w, deg) |
59.083315 |
| M (ma, deg) |
0.004415 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.969 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.969 |
| n |
2.000 |
| gf |
0.978 |
| gb |
-0.501 |
| 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) |
| 2026-06-01 00:00 |
11:43:34.73 |
+63:24:04.6 |
HIP 57429 |
28.74 |
| 2026-06-01 12:00 |
11:43:17.18 |
+63:21:09.2 |
HIP 57429 |
28.09 |
| 2026-06-02 00:00 |
11:42:59.93 |
+63:18:13.2 |
HIP 57429 |
27.85 |
| 2026-06-02 12:00 |
11:42:42.97 |
+63:15:16.7 |
HIP 57429 |
28.02 |
| 2026-06-03 00:00 |
11:42:26.30 |
+63:12:19.8 |
HIP 57429 |
28.61 |
| 2026-06-03 12:00 |
11:42:09.93 |
+63:09:22.4 |
HIP 57429 |
29.56 |
| 2026-06-04 00:00 |
11:41:53.84 |
+63:06:24.5 |
HIP 57429 |
30.86 |
| 2026-06-04 12:00 |
11:41:38.05 |
+63:03:26.2 |
HIP 57429 |
32.45 |
| 2026-06-05 00:00 |
11:41:22.54 |
+63:00:27.4 |
HIP 56710 |
31.17 |
| 2026-06-05 12:00 |
11:41:07.32 |
+62:57:28.3 |
HIP 56710 |
28.10 |
| 2026-06-06 00:00 |
11:40:52.39 |
+62:54:28.7 |
HIP 56710 |
25.16 |
| 2026-06-06 12:00 |
11:40:37.73 |
+62:51:28.8 |
HIP 56710 |
22.38 |
| 2026-06-07 00:00 |
11:40:23.36 |
+62:48:28.5 |
HIP 56710 |
19.83 |
| 2026-06-07 12:00 |
11:40:09.27 |
+62:45:27.9 |
HIP 56710 |
17.60 |
| 2026-06-08 00:00 |
11:39:55.46 |
+62:42:26.9 |
HIP 56710 |
15.83 |
| 2026-06-08 12:00 |
11:39:41.92 |
+62:39:25.7 |
HIP 56710 |
14.67 |
| 2026-06-09 00:00 |
11:39:28.66 |
+62:36:24.1 |
HIP 56933 |
13.87 |
| 2026-06-09 12:00 |
11:39:15.67 |
+62:33:22.2 |
HIP 56933 |
12.03 |
| 2026-06-10 00:00 |
11:39:02.96 |
+62:30:20.1 |
HIP 56933 |
10.93 |
| 2026-06-10 12:00 |
11:38:50.52 |
+62:27:17.7 |
HIP 56933 |
10.79 |
| 2026-06-11 00:00 |
11:38:38.34 |
+62:24:15.1 |
HIP 56933 |
11.64 |
| 2026-06-11 12:00 |
11:38:26.43 |
+62:21:12.2 |
HIP 56686 |
11.86 |
| 2026-06-12 00:00 |
11:38:14.79 |
+62:18:09.1 |
HIP 56686 |
8.65 |
| 2026-06-12 12:00 |
11:38:03.41 |
+62:15:05.9 |
HIP 56686 |
5.61 |
| 2026-06-13 00:00 |
11:37:52.29 |
+62:12:02.4 |
HIP 56686 |
3.25 |
| 2026-06-13 12:00 |
11:37:41.44 |
+62:08:58.8 |
HIP 56686 |
3.43 |
| 2026-06-14 00:00 |
11:37:30.84 |
+62:05:55.0 |
HIP 56686 |
5.91 |
| 2026-06-14 12:00 |
11:37:20.51 |
+62:02:51.1 |
HIP 56686 |
8.94 |
| 2026-06-15 00:00 |
11:37:10.42 |
+61:59:47.1 |
HIP 56686 |
12.11 |
| 2026-06-15 12:00 |
11:37:00.59 |
+61:56:43.0 |
HIP 56686 |
15.32 |
| 2026-06-16 00:00 |
11:36:51.02 |
+61:53:38.7 |
HIP 56686 |
18.56 |
| 2026-06-16 12:00 |
11:36:41.69 |
+61:50:34.4 |
HIP 56765 |
17.08 |
| 2026-06-17 00:00 |
11:36:32.61 |
+61:47:30.0 |
HIP 56765 |
15.79 |
| 2026-06-17 12:00 |
11:36:23.78 |
+61:44:25.6 |
HIP 56765 |
15.07 |
| 2026-06-18 00:00 |
11:36:15.19 |
+61:41:21.1 |
HIP 56693 |
13.86 |
| 2026-06-18 12:00 |
11:36:06.84 |
+61:38:16.7 |
HIP 56693 |
12.41 |
| 2026-06-19 00:00 |
11:35:58.74 |
+61:35:12.2 |
HIP 56693 |
11.67 |
| 2026-06-19 12:00 |
11:35:50.87 |
+61:32:07.7 |
HIP 56693 |
11.77 |
| 2026-06-20 00:00 |
11:35:43.24 |
+61:29:03.2 |
HIP 56693 |
12.68 |
| 2026-06-20 12:00 |
11:35:35.85 |
+61:25:58.8 |
HIP 56693 |
14.25 |
| 2026-06-21 00:00 |
11:35:28.69 |
+61:22:54.4 |
HIP 56693 |
16.28 |
| 2026-06-21 12:00 |
11:35:21.76 |
+61:19:50.0 |
HIP 56693 |
18.62 |
| 2026-06-22 00:00 |
11:35:15.05 |
+61:16:45.7 |
HIP 56693 |
21.16 |