| Parameter |
Value |
| Designation |
P/2024 OC2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2024-10-09T07:52:40.143360Z |
| Orbit solution date (soln_date, UTC) |
2025-01-14T17:42:19Z |
| Obs used |
43 |
| NEO |
Yes |
| M1 |
20.700 |
| K1 |
14.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-08-20.0000000 |
| e |
0.77423172 |
| q (au) |
0.592825 |
| a (au) |
2.625811 |
| i (deg) |
7.671223 |
| Ω (om, deg) |
136.619189 |
| ω (w, deg) |
258.539659 |
| M (ma, deg) |
348.342092 |
Magnitude
Scatter + Global Linear
$$
M_a = (H_0 + n\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
- |
| n |
- |
| gf |
- |
| gb |
- |
| k |
- |
| δ90 |
- |
| 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) |
| 2026-09-25 00:00 |
13:48:36.94 |
-04:31:07.9 |
HIP 67366 |
11.75 |
| 2026-09-25 12:00 |
13:48:59.44 |
-04:33:27.6 |
HIP 67366 |
12.32 |
| 2026-09-26 00:00 |
13:49:21.99 |
-04:35:47.3 |
HIP 67366 |
15.49 |
| 2026-09-26 12:00 |
13:49:44.59 |
-04:38:06.9 |
HIP 67366 |
20.06 |
| 2026-09-27 00:00 |
13:50:07.24 |
-04:40:26.4 |
HIP 67366 |
25.29 |
| 2026-09-27 12:00 |
13:50:29.93 |
-04:42:45.8 |
HIP 67366 |
30.85 |
| 2026-09-28 00:00 |
13:50:52.68 |
-04:45:05.2 |
HIP 67741 |
31.91 |
| 2026-09-28 12:00 |
13:51:15.47 |
-04:47:24.4 |
HIP 67741 |
26.02 |
| 2026-09-29 00:00 |
13:51:38.31 |
-04:49:43.6 |
HIP 67741 |
20.27 |
| 2026-09-29 12:00 |
13:52:01.20 |
-04:52:02.6 |
HIP 67741 |
14.84 |
| 2026-09-30 00:00 |
13:52:24.13 |
-04:54:21.6 |
HIP 67741 |
10.24 |
| 2026-09-30 12:00 |
13:52:47.11 |
-04:56:40.4 |
HIP 67741 |
8.11 |
| 2026-10-01 00:00 |
13:53:10.13 |
-04:58:59.2 |
HIP 67741 |
10.16 |
| 2026-10-01 12:00 |
13:53:33.19 |
-05:01:17.8 |
HIP 67741 |
14.74 |
| 2026-10-02 00:00 |
13:53:56.30 |
-05:03:36.3 |
HIP 67741 |
20.21 |
| 2026-10-02 12:00 |
13:54:19.46 |
-05:05:54.7 |
HIP 67741 |
26.02 |
| 2026-10-03 00:00 |
13:54:42.66 |
-05:08:12.9 |
HIP 67741 |
31.99 |
| 2026-10-03 12:00 |
13:55:05.89 |
-05:10:31.0 |
HIP 67741 |
38.05 |
| 2026-10-04 00:00 |
13:55:29.17 |
-05:12:49.0 |
HIP 68192 |
36.21 |
| 2026-10-04 12:00 |
13:55:52.50 |
-05:15:06.8 |
HIP 68192 |
29.99 |
| 2026-10-05 00:00 |
13:56:15.86 |
-05:17:24.5 |
HIP 68192 |
23.78 |
| 2026-10-05 12:00 |
13:56:39.26 |
-05:19:42.1 |
HIP 68192 |
17.59 |
| 2026-10-06 00:00 |
13:57:02.70 |
-05:21:59.4 |
HIP 68192 |
11.47 |
| 2026-10-06 12:00 |
13:57:26.18 |
-05:24:16.7 |
HIP 68192 |
5.68 |
| 2026-10-07 00:00 |
13:57:49.70 |
-05:26:33.7 |
HIP 68192 |
3.43 |
| 2026-10-07 12:00 |
13:58:13.25 |
-05:28:50.6 |
HIP 68192 |
8.39 |
| 2026-10-08 00:00 |
13:58:36.84 |
-05:31:07.3 |
HIP 68348 |
13.88 |
| 2026-10-08 12:00 |
13:59:00.47 |
-05:33:23.8 |
HIP 68348 |
10.47 |
| 2026-10-09 00:00 |
13:59:24.13 |
-05:35:40.1 |
HIP 68348 |
10.30 |
| 2026-10-09 12:00 |
13:59:47.83 |
-05:37:56.3 |
HIP 68348 |
13.50 |
| 2026-10-10 00:00 |
14:00:11.56 |
-05:40:12.2 |
HIP 68348 |
18.40 |
| 2026-10-10 12:00 |
14:00:35.32 |
-05:42:27.9 |
HIP 68524 |
17.19 |
| 2026-10-11 00:00 |
14:00:59.11 |
-05:44:43.5 |
HIP 68524 |
12.06 |
| 2026-10-11 12:00 |
14:01:22.94 |
-05:46:58.8 |
HIP 68524 |
8.70 |
| 2026-10-12 00:00 |
14:01:46.80 |
-05:49:13.9 |
HIP 68524 |
9.28 |
| 2026-10-12 12:00 |
14:02:10.68 |
-05:51:28.7 |
HIP 68524 |
13.31 |
| 2026-10-13 00:00 |
14:02:34.60 |
-05:53:43.4 |
HIP 68592 |
14.74 |
| 2026-10-13 12:00 |
14:02:58.54 |
-05:55:57.8 |
HIP 68592 |
18.35 |
| 2026-10-14 00:00 |
14:03:22.52 |
-05:58:11.9 |
HIP 68592 |
23.18 |
| 2026-10-14 12:00 |
14:03:46.51 |
-06:00:25.9 |
HIP 68738 |
28.39 |
| 2026-10-15 00:00 |
14:04:10.54 |
-06:02:39.5 |
HIP 68738 |
25.40 |
| 2026-10-15 12:00 |
14:04:34.59 |
-06:04:53.0 |
HIP 68738 |
23.78 |
| 2026-10-16 00:00 |
14:04:58.67 |
-06:07:06.1 |
HIP 68892 |
20.23 |