| Parameter |
Value |
| Designation |
C/2024 C2 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2025-03-10T09:41:40.943040Z |
| Orbit solution date (soln_date, UTC) |
2024-05-07T13:42:26Z |
| Obs used |
65 |
| NEO |
- |
| M1 |
6.200 |
| K1 |
10.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2024-02-01T10:02:20.169600Z |
| Discovery magnitude (MPC) |
20.52 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-02-05.0000000 |
| e |
0.44399030 |
| q (au) |
8.991478 |
| a (au) |
16.171441 |
| i (deg) |
27.284750 |
| Ω (om, deg) |
66.444490 |
| ω (w, deg) |
87.533754 |
| M (ma, deg) |
353.946684 |
Magnitude
Scatter + Global Linear
$$
M_a = (1.227 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
1.227 |
| n |
6.000 |
| gf |
0.906 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
6.840 |
| 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 |
12:14:42.79 |
+24:39:57.6 |
HIP 59861 |
25.47 |
| 2026-07-29 12:00 |
12:14:53.57 |
+24:37:37.9 |
HIP 59861 |
22.82 |
| 2026-07-30 00:00 |
12:15:04.42 |
+24:35:18.3 |
HIP 59861 |
20.38 |
| 2026-07-30 12:00 |
12:15:15.33 |
+24:32:58.6 |
HIP 59861 |
18.22 |
| 2026-07-31 00:00 |
12:15:26.31 |
+24:30:39.1 |
HIP 59861 |
16.47 |
| 2026-07-31 12:00 |
12:15:37.35 |
+24:28:19.5 |
HIP 59861 |
15.27 |
| 2026-08-01 00:00 |
12:15:48.45 |
+24:26:00.0 |
HIP 59861 |
14.78 |
| 2026-08-01 12:00 |
12:15:59.62 |
+24:23:40.4 |
HIP 59861 |
15.06 |
| 2026-08-02 00:00 |
12:16:10.86 |
+24:21:21.0 |
HIP 59861 |
16.09 |
| 2026-08-02 12:00 |
12:16:22.15 |
+24:19:01.5 |
HIP 59861 |
17.74 |
| 2026-08-03 00:00 |
12:16:33.51 |
+24:16:42.2 |
HIP 59861 |
19.86 |
| 2026-08-03 12:00 |
12:16:44.94 |
+24:14:22.8 |
HIP 59847 |
18.51 |
| 2026-08-04 00:00 |
12:16:56.42 |
+24:12:03.5 |
HIP 59847 |
17.38 |
| 2026-08-04 12:00 |
12:17:07.97 |
+24:09:44.3 |
HIP 59847 |
16.93 |
| 2026-08-05 00:00 |
12:17:19.57 |
+24:07:25.1 |
HIP 59847 |
17.20 |
| 2026-08-05 12:00 |
12:17:31.24 |
+24:05:06.0 |
HIP 59847 |
18.19 |
| 2026-08-06 00:00 |
12:17:42.97 |
+24:02:47.0 |
HIP 59847 |
19.77 |
| 2026-08-06 12:00 |
12:17:54.75 |
+24:00:28.1 |
HIP 59847 |
21.84 |
| 2026-08-07 00:00 |
12:18:06.60 |
+23:58:09.2 |
HIP 59847 |
24.27 |
| 2026-08-07 12:00 |
12:18:18.51 |
+23:55:50.4 |
HIP 60056 |
23.53 |
| 2026-08-08 00:00 |
12:18:30.47 |
+23:53:31.7 |
HIP 60056 |
20.41 |
| 2026-08-08 12:00 |
12:18:42.49 |
+23:51:13.0 |
HIP 60056 |
17.46 |
| 2026-08-09 00:00 |
12:18:54.57 |
+23:48:54.5 |
HIP 60056 |
14.80 |
| 2026-08-09 12:00 |
12:19:06.71 |
+23:46:36.1 |
HIP 60056 |
12.61 |
| 2026-08-10 00:00 |
12:19:18.90 |
+23:44:17.7 |
HIP 60056 |
11.20 |
| 2026-08-10 12:00 |
12:19:31.15 |
+23:41:59.5 |
HIP 60056 |
10.88 |
| 2026-08-11 00:00 |
12:19:43.45 |
+23:39:41.4 |
HIP 60056 |
11.75 |
| 2026-08-11 12:00 |
12:19:55.81 |
+23:37:23.4 |
HIP 60056 |
13.58 |
| 2026-08-12 00:00 |
12:20:08.22 |
+23:35:05.5 |
HIP 60056 |
16.06 |
| 2026-08-12 12:00 |
12:20:20.69 |
+23:32:47.8 |
HIP 60056 |
18.94 |
| 2026-08-13 00:00 |
12:20:33.21 |
+23:30:30.2 |
HIP 60056 |
22.06 |
| 2026-08-13 12:00 |
12:20:45.78 |
+23:28:12.7 |
HIP 60056 |
25.35 |
| 2026-08-14 00:00 |
12:20:58.41 |
+23:25:55.4 |
HIP 60056 |
28.74 |
| 2026-08-14 12:00 |
12:21:11.09 |
+23:23:38.2 |
HIP 60200 |
29.53 |
| 2026-08-15 00:00 |
12:21:23.81 |
+23:21:21.2 |
HIP 60200 |
28.17 |
| 2026-08-15 12:00 |
12:21:36.59 |
+23:19:04.3 |
HIP 60200 |
27.25 |
| 2026-08-16 00:00 |
12:21:49.42 |
+23:16:47.6 |
HIP 60446 |
25.78 |
| 2026-08-16 12:00 |
12:22:02.30 |
+23:14:31.0 |
HIP 60446 |
24.01 |
| 2026-08-17 00:00 |
12:22:15.23 |
+23:12:14.6 |
HIP 60375 |
21.19 |
| 2026-08-17 12:00 |
12:22:28.20 |
+23:09:58.4 |
HIP 60375 |
18.12 |
| 2026-08-18 00:00 |
12:22:41.23 |
+23:07:42.4 |
HIP 60375 |
15.37 |
| 2026-08-18 12:00 |
12:22:54.30 |
+23:05:26.5 |
HIP 60375 |
13.13 |
| 2026-08-19 00:00 |
12:23:07.41 |
+23:03:10.9 |
HIP 60375 |
11.71 |