| Parameter |
Value |
| Designation |
P/2022 O2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-01-07T02:42:09.590400Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:49Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
12.700 |
| K1 |
19.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-07-21T09:38:06.057600Z |
| Discovery magnitude (MPC) |
20.85 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-21.0000000 |
| e |
0.72168447 |
| q (au) |
1.756806 |
| a (au) |
6.312283 |
| i (deg) |
9.425474 |
| Ω (om, deg) |
330.499830 |
| ω (w, deg) |
48.642131 |
| M (ma, deg) |
355.145488 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.985 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.985 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| δ90 |
10.000 |
| 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) |
| 2026-03-26 00:00 |
11:03:07.99 |
+02:30:28.4 |
HIP 53952 |
22.83 |
| 2026-03-26 12:00 |
11:02:56.59 |
+02:31:35.8 |
HIP 53952 |
22.41 |
| 2026-03-27 00:00 |
11:02:45.26 |
+02:32:43.0 |
HIP 53952 |
22.41 |
| 2026-03-27 12:00 |
11:02:33.98 |
+02:33:49.8 |
HIP 53952 |
22.81 |
| 2026-03-28 00:00 |
11:02:22.78 |
+02:34:56.4 |
HIP 53952 |
23.60 |
| 2026-03-28 12:00 |
11:02:11.64 |
+02:36:02.7 |
HIP 53952 |
24.72 |
| 2026-03-29 00:00 |
11:02:00.57 |
+02:37:08.7 |
HIP 53952 |
26.13 |
| 2026-03-29 12:00 |
11:01:49.56 |
+02:38:14.3 |
HIP 53804 |
27.71 |
| 2026-03-30 00:00 |
11:01:38.63 |
+02:39:19.7 |
HIP 53804 |
25.06 |
| 2026-03-30 12:00 |
11:01:27.77 |
+02:40:24.7 |
HIP 53804 |
22.49 |
| 2026-03-31 00:00 |
11:01:16.98 |
+02:41:29.4 |
HIP 53804 |
20.04 |
| 2026-03-31 12:00 |
11:01:06.26 |
+02:42:33.7 |
HIP 53804 |
17.73 |
| 2026-04-01 00:00 |
11:00:55.62 |
+02:43:37.7 |
HIP 53804 |
15.64 |
| 2026-04-01 12:00 |
11:00:45.05 |
+02:44:41.4 |
HIP 53804 |
13.83 |
| 2026-04-02 00:00 |
11:00:34.56 |
+02:45:44.6 |
HIP 53804 |
12.42 |
| 2026-04-02 12:00 |
11:00:24.15 |
+02:46:47.6 |
HIP 53804 |
11.55 |
| 2026-04-03 00:00 |
11:00:13.82 |
+02:47:50.1 |
HIP 53804 |
11.31 |
| 2026-04-03 12:00 |
11:00:03.56 |
+02:48:52.2 |
HIP 53804 |
11.75 |
| 2026-04-04 00:00 |
10:59:53.39 |
+02:49:54.0 |
HIP 53804 |
12.77 |
| 2026-04-04 12:00 |
10:59:43.30 |
+02:50:55.4 |
HIP 53804 |
14.24 |
| 2026-04-05 00:00 |
10:59:33.29 |
+02:51:56.3 |
HIP 53804 |
16.02 |
| 2026-04-05 12:00 |
10:59:23.36 |
+02:52:56.9 |
HIP 53804 |
18.01 |
| 2026-04-06 00:00 |
10:59:13.52 |
+02:53:57.0 |
HIP 53804 |
20.14 |
| 2026-04-06 12:00 |
10:59:03.77 |
+02:54:56.7 |
HIP 53804 |
22.36 |
| 2026-04-07 00:00 |
10:58:54.10 |
+02:55:56.0 |
HIP 53804 |
24.65 |
| 2026-04-07 12:00 |
10:58:44.52 |
+02:56:54.8 |
HIP 53592 |
26.37 |
| 2026-04-08 00:00 |
10:58:35.03 |
+02:57:53.2 |
HIP 53592 |
26.09 |
| 2026-04-08 12:00 |
10:58:25.63 |
+02:58:51.2 |
HIP 53592 |
26.06 |
| 2026-04-09 00:00 |
10:58:16.31 |
+02:59:48.7 |
HIP 53592 |
26.27 |
| 2026-04-09 12:00 |
10:58:07.09 |
+03:00:45.7 |
HIP 53592 |
26.72 |
| 2026-04-10 00:00 |
10:57:57.96 |
+03:01:42.2 |
HIP 53592 |
27.38 |
| 2026-04-10 12:00 |
10:57:48.93 |
+03:02:38.3 |
HIP 53592 |
28.24 |
| 2026-04-11 00:00 |
10:57:39.99 |
+03:03:33.9 |
HIP 53512 |
26.59 |
| 2026-04-11 12:00 |
10:57:31.14 |
+03:04:29.0 |
HIP 53512 |
24.79 |
| 2026-04-12 00:00 |
10:57:22.39 |
+03:05:23.6 |
HIP 53512 |
23.11 |
| 2026-04-12 12:00 |
10:57:13.74 |
+03:06:17.7 |
HIP 53512 |
21.57 |
| 2026-04-13 00:00 |
10:57:05.18 |
+03:07:11.3 |
HIP 53512 |
20.20 |
| 2026-04-13 12:00 |
10:56:56.73 |
+03:08:04.3 |
HIP 53512 |
19.02 |
| 2026-04-14 00:00 |
10:56:48.37 |
+03:08:56.9 |
HIP 53512 |
18.07 |
| 2026-04-14 12:00 |
10:56:40.11 |
+03:09:48.9 |
HIP 53512 |
17.37 |
| 2026-04-15 00:00 |
10:56:31.95 |
+03:10:40.4 |
HIP 53512 |
16.93 |
| 2026-04-15 12:00 |
10:56:23.90 |
+03:11:31.4 |
HIP 53512 |
16.78 |
| 2026-04-16 00:00 |
10:56:15.94 |
+03:12:21.8 |
HIP 53512 |
16.91 |