C/2024 L1 (PANSTARRS)
| 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 |
-0.539 |
| 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) |
| 2026-02-03 00:00 |
14:57:26.43 |
-36:30:04.3 |
HIP 73250 |
27.91 |
| 2026-02-03 12:00 |
14:57:22.11 |
-36:34:24.4 |
HIP 72984 |
30.88 |
| 2026-02-04 00:00 |
14:57:17.55 |
-36:38:44.5 |
HIP 73089 |
28.28 |
| 2026-02-04 12:00 |
14:57:12.75 |
-36:43:04.6 |
HIP 73089 |
24.00 |
| 2026-02-05 00:00 |
14:57:07.70 |
-36:47:24.7 |
HIP 73089 |
19.77 |
| 2026-02-05 12:00 |
14:57:02.41 |
-36:51:44.7 |
HIP 73089 |
15.63 |
| 2026-02-06 00:00 |
14:56:56.87 |
-36:56:04.7 |
HIP 73089 |
11.69 |
| 2026-02-06 12:00 |
14:56:51.08 |
-37:00:24.6 |
HIP 73089 |
8.27 |
| 2026-02-07 00:00 |
14:56:45.04 |
-37:04:44.5 |
HIP 73089 |
6.30 |
| 2026-02-07 12:00 |
14:56:38.75 |
-37:09:04.2 |
HIP 73089 |
7.13 |
| 2026-02-08 00:00 |
14:56:32.21 |
-37:13:23.9 |
HIP 73089 |
10.12 |
| 2026-02-08 12:00 |
14:56:25.40 |
-37:17:43.5 |
HIP 73030 |
13.64 |
| 2026-02-09 00:00 |
14:56:18.34 |
-37:22:03.0 |
HIP 73030 |
15.65 |
| 2026-02-09 12:00 |
14:56:11.03 |
-37:26:22.3 |
HIP 73030 |
18.56 |
| 2026-02-10 00:00 |
14:56:03.44 |
-37:30:41.6 |
HIP 73030 |
22.02 |
| 2026-02-10 12:00 |
14:55:55.60 |
-37:35:00.6 |
HIP 72926 |
19.77 |
| 2026-02-11 00:00 |
14:55:47.49 |
-37:39:19.5 |
HIP 72926 |
18.15 |
| 2026-02-11 12:00 |
14:55:39.12 |
-37:43:38.2 |
HIP 72964 |
16.70 |
| 2026-02-12 00:00 |
14:55:30.48 |
-37:47:56.8 |
HIP 72964 |
12.50 |
| 2026-02-12 12:00 |
14:55:21.57 |
-37:52:15.1 |
HIP 72964 |
8.72 |
| 2026-02-13 00:00 |
14:55:12.39 |
-37:56:33.2 |
HIP 72964 |
6.19 |
| 2026-02-13 12:00 |
14:55:02.93 |
-38:00:51.1 |
HIP 72964 |
6.62 |
| 2026-02-14 00:00 |
14:54:53.20 |
-38:05:08.7 |
HIP 72964 |
9.63 |
| 2026-02-14 12:00 |
14:54:43.19 |
-38:09:26.1 |
HIP 72949 |
6.50 |
| 2026-02-15 00:00 |
14:54:32.91 |
-38:13:43.2 |
HIP 72949 |
1.83 |
| 2026-02-15 12:00 |
14:54:22.35 |
-38:18:00.0 |
HIP 72949 |
3.09 |
| 2026-02-16 00:00 |
14:54:11.51 |
-38:22:16.5 |
HIP 72949 |
7.83 |
| 2026-02-16 12:00 |
14:54:00.38 |
-38:26:32.7 |
HIP 72949 |
12.62 |
| 2026-02-17 00:00 |
14:53:48.98 |
-38:30:48.6 |
HIP 72949 |
17.43 |
| 2026-02-17 12:00 |
14:53:37.28 |
-38:35:04.1 |
HIP 72759 |
20.12 |
| 2026-02-18 00:00 |
14:53:25.30 |
-38:39:19.2 |
HIP 72759 |
15.44 |
| 2026-02-18 12:00 |
14:53:13.04 |
-38:43:33.9 |
HIP 72759 |
10.87 |
| 2026-02-19 00:00 |
14:53:00.48 |
-38:47:48.3 |
HIP 72759 |
6.69 |
| 2026-02-19 12:00 |
14:52:47.64 |
-38:52:02.2 |
HIP 72759 |
4.34 |
| 2026-02-20 00:00 |
14:52:34.51 |
-38:56:15.7 |
HIP 72759 |
6.41 |
| 2026-02-20 12:00 |
14:52:21.08 |
-39:00:28.7 |
HIP 72759 |
10.59 |
| 2026-02-21 00:00 |
14:52:07.36 |
-39:04:41.3 |
HIP 72759 |
15.25 |
| 2026-02-21 12:00 |
14:51:53.34 |
-39:08:53.4 |
HIP 72759 |
20.08 |
| 2026-02-22 00:00 |
14:51:39.03 |
-39:13:04.9 |
HIP 72759 |
24.99 |
| 2026-02-22 12:00 |
14:51:24.43 |
-39:17:16.0 |
HIP 72632 |
23.97 |
| 2026-02-23 00:00 |
14:51:09.53 |
-39:21:26.5 |
HIP 72632 |
19.45 |
| 2026-02-23 12:00 |
14:50:54.33 |
-39:25:36.4 |
HIP 72632 |
15.30 |
| 2026-02-24 00:00 |
14:50:38.83 |
-39:29:45.8 |
HIP 72632 |
11.93 |