| 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) |
| 2026-06-01 00:00 |
13:11:30.60 |
+01:34:08.8 |
HIP 64311 |
13.43 |
| 2026-06-01 12:00 |
13:11:19.84 |
+01:34:24.1 |
HIP 64311 |
11.45 |
| 2026-06-02 00:00 |
13:11:09.30 |
+01:34:37.9 |
HIP 64311 |
9.88 |
| 2026-06-02 12:00 |
13:10:58.99 |
+01:34:50.1 |
HIP 64311 |
8.87 |
| 2026-06-03 00:00 |
13:10:48.90 |
+01:35:00.8 |
HIP 64311 |
8.58 |
| 2026-06-03 12:00 |
13:10:39.04 |
+01:35:10.0 |
HIP 64311 |
9.01 |
| 2026-06-04 00:00 |
13:10:29.40 |
+01:35:17.7 |
HIP 64311 |
10.04 |
| 2026-06-04 12:00 |
13:10:19.99 |
+01:35:23.8 |
HIP 64311 |
11.46 |
| 2026-06-05 00:00 |
13:10:10.80 |
+01:35:28.4 |
HIP 64311 |
13.13 |
| 2026-06-05 12:00 |
13:10:01.84 |
+01:35:31.5 |
HIP 64311 |
14.93 |
| 2026-06-06 00:00 |
13:09:53.10 |
+01:35:33.2 |
HIP 64311 |
16.80 |
| 2026-06-06 12:00 |
13:09:44.59 |
+01:35:33.3 |
HIP 64311 |
18.70 |
| 2026-06-07 00:00 |
13:09:36.31 |
+01:35:31.9 |
HIP 64311 |
20.60 |
| 2026-06-07 12:00 |
13:09:28.24 |
+01:35:29.1 |
HIP 64311 |
22.49 |
| 2026-06-08 00:00 |
13:09:20.41 |
+01:35:24.8 |
HIP 64311 |
24.35 |
| 2026-06-08 12:00 |
13:09:12.80 |
+01:35:19.0 |
HIP 64082 |
24.33 |
| 2026-06-09 00:00 |
13:09:05.41 |
+01:35:11.7 |
HIP 64082 |
22.83 |
| 2026-06-09 12:00 |
13:08:58.25 |
+01:35:03.0 |
HIP 64082 |
21.40 |
| 2026-06-10 00:00 |
13:08:51.31 |
+01:34:52.8 |
HIP 64051 |
19.74 |
| 2026-06-10 12:00 |
13:08:44.60 |
+01:34:41.2 |
HIP 64051 |
18.10 |
| 2026-06-11 00:00 |
13:08:38.11 |
+01:34:28.2 |
HIP 64051 |
16.50 |
| 2026-06-11 12:00 |
13:08:31.84 |
+01:34:13.7 |
HIP 64051 |
14.96 |
| 2026-06-12 00:00 |
13:08:25.81 |
+01:33:57.8 |
HIP 64051 |
13.47 |
| 2026-06-12 12:00 |
13:08:19.99 |
+01:33:40.4 |
HIP 64051 |
12.03 |
| 2026-06-13 00:00 |
13:08:14.40 |
+01:33:21.7 |
HIP 64051 |
10.64 |
| 2026-06-13 12:00 |
13:08:09.03 |
+01:33:01.5 |
HIP 64051 |
9.30 |
| 2026-06-14 00:00 |
13:08:03.88 |
+01:32:40.0 |
HIP 64051 |
8.01 |
| 2026-06-14 12:00 |
13:07:58.96 |
+01:32:17.0 |
HIP 64051 |
6.77 |
| 2026-06-15 00:00 |
13:07:54.26 |
+01:31:52.7 |
HIP 64051 |
5.58 |
| 2026-06-15 12:00 |
13:07:49.79 |
+01:31:27.0 |
HIP 64051 |
4.44 |
| 2026-06-16 00:00 |
13:07:45.53 |
+01:31:00.0 |
HIP 64051 |
3.37 |
| 2026-06-16 12:00 |
13:07:41.50 |
+01:30:31.5 |
HIP 64051 |
2.39 |
| 2026-06-17 00:00 |
13:07:37.68 |
+01:30:01.8 |
HIP 64051 |
1.58 |
| 2026-06-17 12:00 |
13:07:34.09 |
+01:29:30.7 |
HIP 64051 |
1.21 |
| 2026-06-18 00:00 |
13:07:30.71 |
+01:28:58.2 |
HIP 64051 |
1.55 |
| 2026-06-18 12:00 |
13:07:27.56 |
+01:28:24.5 |
HIP 64051 |
2.26 |
| 2026-06-19 00:00 |
13:07:24.62 |
+01:27:49.4 |
HIP 64051 |
3.06 |
| 2026-06-19 12:00 |
13:07:21.90 |
+01:27:13.1 |
HIP 64051 |
3.88 |
| 2026-06-20 00:00 |
13:07:19.40 |
+01:26:35.4 |
HIP 64051 |
4.69 |
| 2026-06-20 12:00 |
13:07:17.11 |
+01:25:56.5 |
HIP 64051 |
5.49 |
| 2026-06-21 00:00 |
13:07:15.04 |
+01:25:16.3 |
HIP 64051 |
6.26 |
| 2026-06-21 12:00 |
13:07:13.18 |
+01:24:34.9 |
HIP 64051 |
7.03 |
| 2026-06-22 00:00 |
13:07:11.54 |
+01:23:52.2 |
HIP 64051 |
7.77 |