P/2022 O2 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
11:23:23.27 |
+00:41:38.7 |
HIP 55595 |
33.75 |
| 2026-02-03 12:00 |
11:23:13.51 |
+00:42:23.2 |
HIP 55595 |
34.48 |
| 2026-02-04 00:00 |
11:23:03.65 |
+00:43:08.4 |
HIP 55595 |
35.40 |
| 2026-02-04 12:00 |
11:22:53.71 |
+00:43:54.2 |
HIP 55595 |
36.49 |
| 2026-02-05 00:00 |
11:22:43.69 |
+00:44:40.6 |
HIP 55595 |
37.74 |
| 2026-02-05 12:00 |
11:22:33.57 |
+00:45:27.7 |
HIP 55595 |
39.14 |
| 2026-02-06 00:00 |
11:22:23.37 |
+00:46:15.5 |
HIP 55595 |
40.69 |
| 2026-02-06 12:00 |
11:22:13.09 |
+00:47:03.8 |
HIP 55595 |
42.37 |
| 2026-02-07 00:00 |
11:22:02.72 |
+00:47:52.8 |
HIP 55369 |
41.26 |
| 2026-02-07 12:00 |
11:21:52.27 |
+00:48:42.4 |
HIP 55277 |
39.53 |
| 2026-02-08 00:00 |
11:21:41.75 |
+00:49:32.6 |
HIP 55277 |
37.05 |
| 2026-02-08 12:00 |
11:21:31.14 |
+00:50:23.4 |
HIP 55277 |
34.60 |
| 2026-02-09 00:00 |
11:21:20.45 |
+00:51:14.8 |
HIP 55277 |
32.19 |
| 2026-02-09 12:00 |
11:21:09.69 |
+00:52:06.8 |
HIP 55277 |
29.82 |
| 2026-02-10 00:00 |
11:20:58.85 |
+00:52:59.4 |
HIP 55277 |
27.54 |
| 2026-02-10 12:00 |
11:20:47.94 |
+00:53:52.5 |
HIP 55277 |
25.35 |
| 2026-02-11 00:00 |
11:20:36.96 |
+00:54:46.2 |
HIP 55277 |
23.30 |
| 2026-02-11 12:00 |
11:20:25.90 |
+00:55:40.5 |
HIP 55277 |
21.44 |
| 2026-02-12 00:00 |
11:20:14.77 |
+00:56:35.4 |
HIP 55277 |
19.82 |
| 2026-02-12 12:00 |
11:20:03.58 |
+00:57:30.7 |
HIP 55277 |
18.52 |
| 2026-02-13 00:00 |
11:19:52.32 |
+00:58:26.6 |
HIP 55277 |
17.62 |
| 2026-02-13 12:00 |
11:19:40.99 |
+00:59:23.1 |
HIP 55277 |
17.20 |
| 2026-02-14 00:00 |
11:19:29.59 |
+01:00:20.0 |
HIP 55277 |
17.29 |
| 2026-02-14 12:00 |
11:19:18.14 |
+01:01:17.5 |
HIP 55277 |
17.90 |
| 2026-02-15 00:00 |
11:19:06.62 |
+01:02:15.5 |
HIP 55277 |
18.99 |
| 2026-02-15 12:00 |
11:18:55.04 |
+01:03:14.0 |
HIP 55277 |
20.49 |
| 2026-02-16 00:00 |
11:18:43.40 |
+01:04:12.9 |
HIP 55277 |
22.32 |
| 2026-02-16 12:00 |
11:18:31.71 |
+01:05:12.4 |
HIP 55277 |
24.41 |
| 2026-02-17 00:00 |
11:18:19.96 |
+01:06:12.3 |
HIP 55277 |
26.71 |
| 2026-02-17 12:00 |
11:18:08.15 |
+01:07:12.6 |
HIP 55277 |
29.17 |
| 2026-02-18 00:00 |
11:17:56.29 |
+01:08:13.5 |
HIP 55277 |
31.77 |
| 2026-02-18 12:00 |
11:17:44.38 |
+01:09:14.7 |
HIP 55277 |
34.46 |
| 2026-02-19 00:00 |
11:17:32.43 |
+01:10:16.4 |
HIP 55249 |
35.39 |
| 2026-02-19 12:00 |
11:17:20.42 |
+01:11:18.5 |
HIP 55249 |
36.43 |
| 2026-02-20 00:00 |
11:17:08.37 |
+01:12:21.1 |
HIP 55249 |
37.71 |
| 2026-02-20 12:00 |
11:16:56.27 |
+01:13:24.0 |
HIP 55249 |
39.21 |
| 2026-02-21 00:00 |
11:16:44.13 |
+01:14:27.3 |
HIP 55249 |
40.91 |
| 2026-02-21 12:00 |
11:16:31.95 |
+01:15:31.1 |
HIP 54889 |
39.79 |
| 2026-02-22 00:00 |
11:16:19.73 |
+01:16:35.1 |
HIP 54889 |
37.95 |
| 2026-02-22 12:00 |
11:16:07.47 |
+01:17:39.6 |
HIP 54889 |
36.30 |
| 2026-02-23 00:00 |
11:15:55.18 |
+01:18:44.4 |
HIP 54889 |
34.87 |
| 2026-02-23 12:00 |
11:15:42.85 |
+01:19:49.5 |
HIP 54889 |
33.70 |
| 2026-02-24 00:00 |
11:15:30.49 |
+01:20:55.0 |
HIP 54889 |
32.82 |