| Parameter |
Value |
| Designation |
P/2022 C2 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2022-08-06T14:14:16.523520Z |
| Orbit solution date (soln_date, UTC) |
2023-11-12T20:43:31Z |
| Obs used |
255 |
| NEO |
- |
| M1 |
7.100 |
| K1 |
18.000 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-02T13:07:46.243200Z |
| Discovery magnitude (MPC) |
20.84 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-04-22.0000000 |
| e |
0.44280537 |
| q (au) |
3.370418 |
| a (au) |
6.048907 |
| i (deg) |
9.979754 |
| Ω (om, deg) |
135.274414 |
| ω (w, deg) |
89.300280 |
| M (ma, deg) |
352.938151 |
Magnitude
Scatter + Global Linear
$$
M_a = (7.861 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
7.861 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.869 |
| 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 |
00:06:26.94 |
-05:50:57.7 |
HIP 443 |
18.66 |
| 2026-03-26 12:00 |
00:06:45.03 |
-05:49:12.3 |
HIP 443 |
22.16 |
| 2026-03-27 00:00 |
00:07:03.10 |
-05:47:27.1 |
HIP 637 |
21.41 |
| 2026-03-27 12:00 |
00:07:21.16 |
-05:45:42.1 |
HIP 637 |
17.82 |
| 2026-03-28 00:00 |
00:07:39.21 |
-05:43:57.4 |
HIP 637 |
14.95 |
| 2026-03-28 12:00 |
00:07:57.25 |
-05:42:13.0 |
HIP 637 |
13.27 |
| 2026-03-29 00:00 |
00:08:15.27 |
-05:40:28.8 |
HIP 637 |
13.22 |
| 2026-03-29 12:00 |
00:08:33.27 |
-05:38:44.9 |
HIP 637 |
14.83 |
| 2026-03-30 00:00 |
00:08:51.26 |
-05:37:01.2 |
HIP 637 |
17.64 |
| 2026-03-30 12:00 |
00:09:09.24 |
-05:35:17.8 |
HIP 637 |
21.17 |
| 2026-03-31 00:00 |
00:09:27.19 |
-05:33:34.7 |
HIP 840 |
22.67 |
| 2026-03-31 12:00 |
00:09:45.14 |
-05:31:51.9 |
HIP 840 |
18.92 |
| 2026-04-01 00:00 |
00:10:03.06 |
-05:30:09.3 |
HIP 840 |
15.74 |
| 2026-04-01 12:00 |
00:10:20.97 |
-05:28:27.1 |
HIP 840 |
13.55 |
| 2026-04-02 00:00 |
00:10:38.86 |
-05:26:45.1 |
HIP 840 |
12.84 |
| 2026-04-02 12:00 |
00:10:56.73 |
-05:25:03.4 |
HIP 840 |
13.85 |
| 2026-04-03 00:00 |
00:11:14.58 |
-05:23:22.0 |
HIP 840 |
16.25 |
| 2026-04-03 12:00 |
00:11:32.41 |
-05:21:40.9 |
HIP 936 |
17.61 |
| 2026-04-04 00:00 |
00:11:50.22 |
-05:20:00.1 |
HIP 936 |
16.32 |
| 2026-04-04 12:00 |
00:12:08.01 |
-05:18:19.6 |
HIP 936 |
16.35 |
| 2026-04-05 00:00 |
00:12:25.78 |
-05:16:39.4 |
HIP 1062 |
11.74 |
| 2026-04-05 12:00 |
00:12:43.53 |
-05:14:59.6 |
HIP 1062 |
7.14 |
| 2026-04-06 00:00 |
00:13:01.25 |
-05:13:20.0 |
HIP 1062 |
2.96 |
| 2026-04-06 12:00 |
00:13:18.96 |
-05:11:40.8 |
HIP 1062 |
3.31 |
| 2026-04-07 00:00 |
00:13:36.64 |
-05:10:01.9 |
HIP 1062 |
7.57 |
| 2026-04-07 12:00 |
00:13:54.29 |
-05:08:23.3 |
HIP 1062 |
12.15 |
| 2026-04-08 00:00 |
00:14:11.92 |
-05:06:45.0 |
HIP 1062 |
16.79 |
| 2026-04-08 12:00 |
00:14:29.53 |
-05:05:07.1 |
HIP 1062 |
21.44 |
| 2026-04-09 00:00 |
00:14:47.11 |
-05:03:29.5 |
HIP 1062 |
26.09 |
| 2026-04-09 12:00 |
00:15:04.67 |
-05:01:52.3 |
HIP 1324 |
23.51 |
| 2026-04-10 00:00 |
00:15:22.20 |
-05:00:15.4 |
HIP 1324 |
18.99 |
| 2026-04-10 12:00 |
00:15:39.70 |
-04:58:38.9 |
HIP 1324 |
14.56 |
| 2026-04-11 00:00 |
00:15:57.18 |
-04:57:02.7 |
HIP 1324 |
10.34 |
| 2026-04-11 12:00 |
00:16:14.63 |
-04:55:26.8 |
HIP 1324 |
6.69 |
| 2026-04-12 00:00 |
00:16:32.05 |
-04:53:51.4 |
HIP 1324 |
5.04 |
| 2026-04-12 12:00 |
00:16:49.44 |
-04:52:16.3 |
HIP 1324 |
6.98 |
| 2026-04-13 00:00 |
00:17:06.80 |
-04:50:41.6 |
HIP 1324 |
10.69 |
| 2026-04-13 12:00 |
00:17:24.13 |
-04:49:07.2 |
HIP 1324 |
14.90 |
| 2026-04-14 00:00 |
00:17:41.43 |
-04:47:33.2 |
HIP 1324 |
19.27 |
| 2026-04-14 12:00 |
00:17:58.69 |
-04:45:59.6 |
HIP 1380 |
21.85 |
| 2026-04-15 00:00 |
00:18:15.93 |
-04:44:26.4 |
HIP 1380 |
23.04 |
| 2026-04-15 12:00 |
00:18:33.13 |
-04:42:53.6 |
HIP 1380 |
25.02 |
| 2026-04-16 00:00 |
00:18:50.30 |
-04:41:21.2 |
HIP 1380 |
27.61 |