P/2024 OC2 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
14:15:51.16 |
-05:47:26.9 |
HIP 69701 |
12.76 |
| 2026-02-03 12:00 |
14:15:53.11 |
-05:46:32.1 |
HIP 69701 |
13.58 |
| 2026-02-04 00:00 |
14:15:54.81 |
-05:45:35.9 |
HIP 69701 |
14.45 |
| 2026-02-04 12:00 |
14:15:56.27 |
-05:44:38.4 |
HIP 69775 |
14.52 |
| 2026-02-05 00:00 |
14:15:57.48 |
-05:43:39.4 |
HIP 69775 |
13.86 |
| 2026-02-05 12:00 |
14:15:58.45 |
-05:42:39.1 |
HIP 69775 |
13.30 |
| 2026-02-06 00:00 |
14:15:59.18 |
-05:41:37.3 |
HIP 69775 |
12.86 |
| 2026-02-06 12:00 |
14:15:59.65 |
-05:40:34.2 |
HIP 69775 |
12.54 |
| 2026-02-07 00:00 |
14:15:59.88 |
-05:39:29.7 |
HIP 69775 |
12.36 |
| 2026-02-07 12:00 |
14:15:59.86 |
-05:38:23.8 |
HIP 69775 |
12.34 |
| 2026-02-08 00:00 |
14:15:59.60 |
-05:37:16.5 |
HIP 69775 |
12.48 |
| 2026-02-08 12:00 |
14:15:59.08 |
-05:36:07.8 |
HIP 69775 |
12.78 |
| 2026-02-09 00:00 |
14:15:58.31 |
-05:34:57.7 |
HIP 69775 |
13.24 |
| 2026-02-09 12:00 |
14:15:57.28 |
-05:33:46.2 |
HIP 69775 |
13.86 |
| 2026-02-10 00:00 |
14:15:56.01 |
-05:32:33.3 |
HIP 69775 |
14.62 |
| 2026-02-10 12:00 |
14:15:54.48 |
-05:31:19.1 |
HIP 69775 |
15.51 |
| 2026-02-11 00:00 |
14:15:52.70 |
-05:30:03.4 |
HIP 69775 |
16.52 |
| 2026-02-11 12:00 |
14:15:50.66 |
-05:28:46.4 |
HIP 69775 |
17.64 |
| 2026-02-12 00:00 |
14:15:48.37 |
-05:27:28.0 |
HIP 69775 |
18.86 |
| 2026-02-12 12:00 |
14:15:45.82 |
-05:26:08.2 |
HIP 69586 |
18.34 |
| 2026-02-13 00:00 |
14:15:43.01 |
-05:24:47.1 |
HIP 69586 |
17.24 |
| 2026-02-13 12:00 |
14:15:39.95 |
-05:23:24.5 |
HIP 69586 |
16.14 |
| 2026-02-14 00:00 |
14:15:36.63 |
-05:22:00.6 |
HIP 69586 |
15.05 |
| 2026-02-14 12:00 |
14:15:33.06 |
-05:20:35.3 |
HIP 69586 |
14.00 |
| 2026-02-15 00:00 |
14:15:29.22 |
-05:19:08.7 |
HIP 69586 |
13.02 |
| 2026-02-15 12:00 |
14:15:25.13 |
-05:17:40.7 |
HIP 69586 |
12.15 |
| 2026-02-16 00:00 |
14:15:20.77 |
-05:16:11.4 |
HIP 69586 |
11.43 |
| 2026-02-16 12:00 |
14:15:16.16 |
-05:14:40.7 |
HIP 69586 |
10.94 |
| 2026-02-17 00:00 |
14:15:11.29 |
-05:13:08.7 |
HIP 69586 |
10.72 |
| 2026-02-17 12:00 |
14:15:06.15 |
-05:11:35.3 |
HIP 69586 |
10.83 |
| 2026-02-18 00:00 |
14:15:00.76 |
-05:10:00.6 |
HIP 69586 |
11.29 |
| 2026-02-18 12:00 |
14:14:55.11 |
-05:08:24.6 |
HIP 69586 |
12.08 |
| 2026-02-19 00:00 |
14:14:49.20 |
-05:06:47.2 |
HIP 69586 |
13.18 |
| 2026-02-19 12:00 |
14:14:43.03 |
-05:05:08.6 |
HIP 69586 |
14.55 |
| 2026-02-20 00:00 |
14:14:36.59 |
-05:03:28.6 |
HIP 69586 |
16.13 |
| 2026-02-20 12:00 |
14:14:29.90 |
-05:01:47.4 |
HIP 69572 |
14.66 |
| 2026-02-21 00:00 |
14:14:22.95 |
-05:00:04.8 |
HIP 69572 |
12.99 |
| 2026-02-21 12:00 |
14:14:15.74 |
-04:58:21.0 |
HIP 69572 |
11.59 |
| 2026-02-22 00:00 |
14:14:08.27 |
-04:56:35.9 |
HIP 69572 |
10.60 |
| 2026-02-22 12:00 |
14:14:00.55 |
-04:54:49.5 |
HIP 69572 |
10.20 |
| 2026-02-23 00:00 |
14:13:52.56 |
-04:53:01.9 |
HIP 69572 |
10.51 |
| 2026-02-23 12:00 |
14:13:44.32 |
-04:51:13.1 |
HIP 69572 |
11.50 |
| 2026-02-24 00:00 |
14:13:35.82 |
-04:49:23.0 |
HIP 69572 |
13.06 |