| Parameter |
Value |
| Designation |
P/2022 C1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2021-11-04T08:47:01.587840Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:43:58Z |
| Obs used |
61 |
| NEO |
- |
| M1 |
15.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-02-03T07:57:07.516800Z |
| Discovery magnitude (MPC) |
20.85 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-02-23.0000000 |
| e |
0.44770397 |
| q (au) |
3.985559 |
| a (au) |
7.216346 |
| i (deg) |
4.762986 |
| Ω (om, deg) |
113.151420 |
| ω (w, deg) |
9.340297 |
| M (ma, deg) |
5.624924 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.330 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.330 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.738 |
| k |
0.800 |
| 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 |
17:15:29.48 |
-19:49:03.4 |
HIP 84367 |
8.88 |
| 2026-03-26 12:00 |
17:15:29.85 |
-19:48:56.2 |
HIP 84367 |
9.00 |
| 2026-03-27 00:00 |
17:15:30.08 |
-19:48:48.9 |
HIP 84367 |
9.09 |
| 2026-03-27 12:00 |
17:15:30.19 |
-19:48:41.4 |
HIP 84367 |
9.16 |
| 2026-03-28 00:00 |
17:15:30.16 |
-19:48:33.8 |
HIP 84367 |
9.20 |
| 2026-03-28 12:00 |
17:15:30.00 |
-19:48:26.1 |
HIP 84367 |
9.21 |
| 2026-03-29 00:00 |
17:15:29.70 |
-19:48:18.2 |
HIP 84367 |
9.19 |
| 2026-03-29 12:00 |
17:15:29.28 |
-19:48:10.3 |
HIP 84367 |
9.15 |
| 2026-03-30 00:00 |
17:15:28.72 |
-19:48:02.2 |
HIP 84367 |
9.09 |
| 2026-03-30 12:00 |
17:15:28.03 |
-19:47:54.0 |
HIP 84367 |
9.00 |
| 2026-03-31 00:00 |
17:15:27.21 |
-19:47:45.7 |
HIP 84367 |
8.89 |
| 2026-03-31 12:00 |
17:15:26.26 |
-19:47:37.3 |
HIP 84367 |
8.75 |
| 2026-04-01 00:00 |
17:15:25.17 |
-19:47:28.7 |
HIP 84367 |
8.60 |
| 2026-04-01 12:00 |
17:15:23.96 |
-19:47:20.0 |
HIP 84367 |
8.43 |
| 2026-04-02 00:00 |
17:15:22.61 |
-19:47:11.3 |
HIP 84367 |
8.24 |
| 2026-04-02 12:00 |
17:15:21.13 |
-19:47:02.4 |
HIP 84367 |
8.05 |
| 2026-04-03 00:00 |
17:15:19.53 |
-19:46:53.3 |
HIP 84367 |
7.84 |
| 2026-04-03 12:00 |
17:15:17.79 |
-19:46:44.2 |
HIP 84367 |
7.62 |
| 2026-04-04 00:00 |
17:15:15.92 |
-19:46:35.0 |
HIP 84367 |
7.41 |
| 2026-04-04 12:00 |
17:15:13.91 |
-19:46:25.7 |
HIP 84367 |
7.20 |
| 2026-04-05 00:00 |
17:15:11.78 |
-19:46:16.2 |
HIP 84367 |
7.00 |
| 2026-04-05 12:00 |
17:15:09.52 |
-19:46:06.6 |
HIP 84367 |
6.82 |
| 2026-04-06 00:00 |
17:15:07.13 |
-19:45:57.0 |
HIP 84367 |
6.67 |
| 2026-04-06 12:00 |
17:15:04.61 |
-19:45:47.2 |
HIP 84367 |
6.55 |
| 2026-04-07 00:00 |
17:15:01.96 |
-19:45:37.3 |
HIP 84367 |
6.49 |
| 2026-04-07 12:00 |
17:14:59.18 |
-19:45:27.3 |
HIP 84367 |
6.48 |
| 2026-04-08 00:00 |
17:14:56.28 |
-19:45:17.2 |
HIP 84367 |
6.54 |
| 2026-04-08 12:00 |
17:14:53.24 |
-19:45:07.0 |
HIP 84367 |
6.68 |
| 2026-04-09 00:00 |
17:14:50.07 |
-19:44:56.7 |
HIP 84367 |
6.90 |
| 2026-04-09 12:00 |
17:14:46.78 |
-19:44:46.3 |
HIP 84367 |
7.21 |
| 2026-04-10 00:00 |
17:14:43.36 |
-19:44:35.8 |
HIP 84367 |
7.59 |
| 2026-04-10 12:00 |
17:14:39.81 |
-19:44:25.2 |
HIP 84367 |
8.06 |
| 2026-04-11 00:00 |
17:14:36.13 |
-19:44:14.5 |
HIP 84367 |
8.60 |
| 2026-04-11 12:00 |
17:14:32.33 |
-19:44:03.8 |
HIP 84367 |
9.21 |
| 2026-04-12 00:00 |
17:14:28.40 |
-19:43:52.9 |
HIP 84367 |
9.89 |
| 2026-04-12 12:00 |
17:14:24.35 |
-19:43:41.9 |
HIP 84367 |
10.62 |
| 2026-04-13 00:00 |
17:14:20.17 |
-19:43:30.8 |
HIP 84367 |
11.42 |
| 2026-04-13 12:00 |
17:14:15.86 |
-19:43:19.6 |
HIP 84367 |
12.26 |
| 2026-04-14 00:00 |
17:14:11.43 |
-19:43:08.4 |
HIP 84367 |
13.16 |
| 2026-04-14 12:00 |
17:14:06.88 |
-19:42:57.0 |
HIP 84367 |
14.10 |
| 2026-04-15 00:00 |
17:14:02.20 |
-19:42:45.6 |
HIP 84367 |
15.09 |
| 2026-04-15 12:00 |
17:13:57.40 |
-19:42:34.0 |
HIP 84367 |
16.12 |
| 2026-04-16 00:00 |
17:13:52.47 |
-19:42:22.4 |
HIP 84367 |
17.19 |