| 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) |
| 2026-06-01 00:00 |
16:59:38.38 |
-19:21:03.4 |
HIP 83125 |
6.99 |
| 2026-06-01 12:00 |
16:59:26.49 |
-19:20:49.3 |
HIP 83125 |
5.47 |
| 2026-06-02 00:00 |
16:59:14.59 |
-19:20:35.3 |
HIP 83125 |
5.18 |
| 2026-06-02 12:00 |
16:59:02.67 |
-19:20:21.3 |
HIP 83125 |
6.29 |
| 2026-06-03 00:00 |
16:58:50.75 |
-19:20:07.4 |
HIP 83125 |
8.26 |
| 2026-06-03 12:00 |
16:58:38.81 |
-19:19:53.5 |
HIP 83125 |
10.62 |
| 2026-06-04 00:00 |
16:58:26.88 |
-19:19:39.7 |
HIP 83125 |
13.17 |
| 2026-06-04 12:00 |
16:58:14.94 |
-19:19:26.0 |
HIP 83125 |
15.81 |
| 2026-06-05 00:00 |
16:58:02.99 |
-19:19:12.3 |
HIP 83125 |
18.51 |
| 2026-06-05 12:00 |
16:57:51.05 |
-19:18:58.7 |
HIP 82951 |
17.41 |
| 2026-06-06 00:00 |
16:57:39.10 |
-19:18:45.1 |
HIP 82951 |
15.95 |
| 2026-06-06 12:00 |
16:57:27.16 |
-19:18:31.6 |
HIP 82951 |
14.90 |
| 2026-06-07 00:00 |
16:57:15.22 |
-19:18:18.2 |
HIP 82951 |
14.33 |
| 2026-06-07 12:00 |
16:57:03.28 |
-19:18:04.9 |
HIP 82951 |
14.31 |
| 2026-06-08 00:00 |
16:56:51.35 |
-19:17:51.6 |
HIP 82951 |
14.83 |
| 2026-06-08 12:00 |
16:56:39.43 |
-19:17:38.5 |
HIP 82951 |
15.85 |
| 2026-06-09 00:00 |
16:56:27.52 |
-19:17:25.4 |
HIP 82951 |
17.26 |
| 2026-06-09 12:00 |
16:56:15.62 |
-19:17:12.4 |
HIP 82800 |
16.34 |
| 2026-06-10 00:00 |
16:56:03.73 |
-19:16:59.4 |
HIP 82800 |
14.26 |
| 2026-06-10 12:00 |
16:55:51.85 |
-19:16:46.6 |
HIP 82800 |
12.47 |
| 2026-06-11 00:00 |
16:55:39.99 |
-19:16:33.9 |
HIP 82800 |
11.12 |
| 2026-06-11 12:00 |
16:55:28.15 |
-19:16:21.2 |
HIP 82800 |
10.35 |
| 2026-06-12 00:00 |
16:55:16.32 |
-19:16:08.7 |
HIP 82800 |
10.32 |
| 2026-06-12 12:00 |
16:55:04.52 |
-19:15:56.2 |
HIP 82800 |
11.02 |
| 2026-06-13 00:00 |
16:54:52.74 |
-19:15:43.9 |
HIP 82704 |
10.12 |
| 2026-06-13 12:00 |
16:54:40.98 |
-19:15:31.6 |
HIP 82704 |
8.28 |
| 2026-06-14 00:00 |
16:54:29.24 |
-19:15:19.5 |
HIP 82704 |
7.08 |
| 2026-06-14 12:00 |
16:54:17.54 |
-19:15:07.4 |
HIP 82704 |
6.87 |
| 2026-06-15 00:00 |
16:54:05.86 |
-19:14:55.5 |
HIP 82704 |
7.71 |
| 2026-06-15 12:00 |
16:53:54.21 |
-19:14:43.7 |
HIP 82704 |
9.32 |
| 2026-06-16 00:00 |
16:53:42.59 |
-19:14:32.0 |
HIP 82704 |
11.37 |
| 2026-06-16 12:00 |
16:53:31.01 |
-19:14:20.5 |
HIP 82704 |
13.66 |
| 2026-06-17 00:00 |
16:53:19.46 |
-19:14:09.0 |
HIP 82547 |
15.66 |
| 2026-06-17 12:00 |
16:53:07.94 |
-19:13:57.7 |
HIP 82547 |
13.42 |
| 2026-06-18 00:00 |
16:52:56.47 |
-19:13:46.5 |
HIP 82547 |
11.39 |
| 2026-06-18 12:00 |
16:52:45.03 |
-19:13:35.4 |
HIP 82547 |
9.71 |
| 2026-06-19 00:00 |
16:52:33.63 |
-19:13:24.5 |
HIP 82547 |
8.57 |
| 2026-06-19 12:00 |
16:52:22.28 |
-19:13:13.6 |
HIP 82547 |
8.20 |
| 2026-06-20 00:00 |
16:52:10.97 |
-19:13:03.0 |
HIP 82547 |
8.67 |
| 2026-06-20 12:00 |
16:51:59.70 |
-19:12:52.4 |
HIP 82547 |
9.87 |
| 2026-06-21 00:00 |
16:51:48.48 |
-19:12:42.0 |
HIP 82465 |
9.15 |
| 2026-06-21 12:00 |
16:51:37.31 |
-19:12:31.7 |
HIP 82465 |
6.52 |
| 2026-06-22 00:00 |
16:51:26.19 |
-19:12:21.6 |
HIP 82465 |
3.94 |