| Parameter |
Value |
| Designation |
C/2024 C1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2024-08-30T22:56:59.887680Z |
| Orbit solution date (soln_date, UTC) |
2025-07-07T14:12:18Z |
| Obs used |
188 |
| NEO |
- |
| M1 |
14.400 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-09T09:41:44.390400Z |
| Discovery magnitude (MPC) |
21.20 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-12-14.0000000 |
| e |
0.58255898 |
| q (au) |
4.412801 |
| a (au) |
10.571075 |
| i (deg) |
14.226966 |
| Ω (om, deg) |
83.809025 |
| ω (w, deg) |
94.478490 |
| M (ma, deg) |
3.012281 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.508 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.508 |
| n |
2.000 |
| gf |
0.838 |
| gb |
-0.500 |
| k |
0.862 |
| δ90 |
2.410 |
| 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) |
| 2026-03-26 00:00 |
16:49:45.45 |
-16:58:19.9 |
HIP 82331 |
13.21 |
| 2026-03-26 12:00 |
16:49:46.74 |
-16:58:32.1 |
HIP 82331 |
13.53 |
| 2026-03-27 00:00 |
16:49:47.83 |
-16:58:44.2 |
HIP 82331 |
13.82 |
| 2026-03-27 12:00 |
16:49:48.74 |
-16:58:56.1 |
HIP 82331 |
14.10 |
| 2026-03-28 00:00 |
16:49:49.46 |
-16:59:07.8 |
HIP 82331 |
14.35 |
| 2026-03-28 12:00 |
16:49:49.99 |
-16:59:19.3 |
HIP 82331 |
14.58 |
| 2026-03-29 00:00 |
16:49:50.34 |
-16:59:30.6 |
HIP 82331 |
14.78 |
| 2026-03-29 12:00 |
16:49:50.50 |
-16:59:41.7 |
HIP 82331 |
14.97 |
| 2026-03-30 00:00 |
16:49:50.47 |
-16:59:52.7 |
HIP 82331 |
15.13 |
| 2026-03-30 12:00 |
16:49:50.26 |
-17:00:03.5 |
HIP 82331 |
15.26 |
| 2026-03-31 00:00 |
16:49:49.86 |
-17:00:14.1 |
HIP 82331 |
15.38 |
| 2026-03-31 12:00 |
16:49:49.27 |
-17:00:24.5 |
HIP 82331 |
15.48 |
| 2026-04-01 00:00 |
16:49:48.50 |
-17:00:34.8 |
HIP 82331 |
15.56 |
| 2026-04-01 12:00 |
16:49:47.55 |
-17:00:44.9 |
HIP 82331 |
15.63 |
| 2026-04-02 00:00 |
16:49:46.41 |
-17:00:54.8 |
HIP 82331 |
15.68 |
| 2026-04-02 12:00 |
16:49:45.09 |
-17:01:04.6 |
HIP 82331 |
15.72 |
| 2026-04-03 00:00 |
16:49:43.58 |
-17:01:14.2 |
HIP 82331 |
15.75 |
| 2026-04-03 12:00 |
16:49:41.88 |
-17:01:23.7 |
HIP 82331 |
15.77 |
| 2026-04-04 00:00 |
16:49:40.01 |
-17:01:33.0 |
HIP 82331 |
15.80 |
| 2026-04-04 12:00 |
16:49:37.95 |
-17:01:42.2 |
HIP 82331 |
15.82 |
| 2026-04-05 00:00 |
16:49:35.71 |
-17:01:51.2 |
HIP 82331 |
15.85 |
| 2026-04-05 12:00 |
16:49:33.28 |
-17:02:00.0 |
HIP 82331 |
15.89 |
| 2026-04-06 00:00 |
16:49:30.67 |
-17:02:08.7 |
HIP 82331 |
15.94 |
| 2026-04-06 12:00 |
16:49:27.88 |
-17:02:17.3 |
HIP 82331 |
16.02 |
| 2026-04-07 00:00 |
16:49:24.91 |
-17:02:25.7 |
HIP 82331 |
16.11 |
| 2026-04-07 12:00 |
16:49:21.76 |
-17:02:34.0 |
HIP 82331 |
16.24 |
| 2026-04-08 00:00 |
16:49:18.42 |
-17:02:42.2 |
HIP 82331 |
16.40 |
| 2026-04-08 12:00 |
16:49:14.91 |
-17:02:50.2 |
HIP 82331 |
16.61 |
| 2026-04-09 00:00 |
16:49:11.22 |
-17:02:58.1 |
HIP 82331 |
16.86 |
| 2026-04-09 12:00 |
16:49:07.35 |
-17:03:05.9 |
HIP 82331 |
17.15 |
| 2026-04-10 00:00 |
16:49:03.30 |
-17:03:13.5 |
HIP 82331 |
17.51 |
| 2026-04-10 12:00 |
16:48:59.07 |
-17:03:21.0 |
HIP 82331 |
17.92 |
| 2026-04-11 00:00 |
16:48:54.66 |
-17:03:28.4 |
HIP 82331 |
18.39 |
| 2026-04-11 12:00 |
16:48:50.08 |
-17:03:35.7 |
HIP 82331 |
18.92 |
| 2026-04-12 00:00 |
16:48:45.32 |
-17:03:42.9 |
HIP 82331 |
19.52 |
| 2026-04-12 12:00 |
16:48:40.39 |
-17:03:50.0 |
HIP 82331 |
20.18 |
| 2026-04-13 00:00 |
16:48:35.28 |
-17:03:56.9 |
HIP 82331 |
20.92 |
| 2026-04-13 12:00 |
16:48:30.00 |
-17:04:03.8 |
HIP 82331 |
21.72 |
| 2026-04-14 00:00 |
16:48:24.55 |
-17:04:10.5 |
HIP 82331 |
22.58 |
| 2026-04-14 12:00 |
16:48:18.92 |
-17:04:17.1 |
HIP 82331 |
23.52 |
| 2026-04-15 00:00 |
16:48:13.12 |
-17:04:23.7 |
HIP 82331 |
24.51 |
| 2026-04-15 12:00 |
16:48:07.15 |
-17:04:30.1 |
HIP 82331 |
25.58 |
| 2026-04-16 00:00 |
16:48:01.02 |
-17:04:36.5 |
HIP 82331 |
26.70 |