P/2022 C1 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
17:03:54.06 |
-19:46:44.5 |
HIP 83452 |
19.05 |
| 2026-02-03 12:00 |
17:04:06.47 |
-19:46:56.2 |
HIP 83474 |
20.48 |
| 2026-02-04 00:00 |
17:04:18.79 |
-19:47:07.7 |
HIP 83474 |
21.83 |
| 2026-02-04 12:00 |
17:04:31.01 |
-19:47:18.9 |
HIP 83474 |
23.45 |
| 2026-02-05 00:00 |
17:04:43.15 |
-19:47:29.9 |
HIP 83600 |
25.21 |
| 2026-02-05 12:00 |
17:04:55.19 |
-19:47:40.6 |
HIP 83600 |
24.32 |
| 2026-02-06 00:00 |
17:05:07.13 |
-19:47:51.2 |
HIP 83600 |
23.74 |
| 2026-02-06 12:00 |
17:05:18.98 |
-19:48:01.5 |
HIP 83600 |
23.48 |
| 2026-02-07 00:00 |
17:05:30.74 |
-19:48:11.5 |
HIP 83600 |
23.56 |
| 2026-02-07 12:00 |
17:05:42.40 |
-19:48:21.3 |
HIP 83600 |
23.96 |
| 2026-02-08 00:00 |
17:05:53.96 |
-19:48:30.9 |
HIP 83600 |
24.65 |
| 2026-02-08 12:00 |
17:06:05.42 |
-19:48:40.3 |
HIP 83761 |
23.32 |
| 2026-02-09 00:00 |
17:06:16.79 |
-19:48:49.4 |
HIP 83761 |
21.90 |
| 2026-02-09 12:00 |
17:06:28.06 |
-19:48:58.3 |
HIP 83761 |
20.73 |
| 2026-02-10 00:00 |
17:06:39.23 |
-19:49:07.0 |
HIP 83761 |
19.86 |
| 2026-02-10 12:00 |
17:06:50.30 |
-19:49:15.4 |
HIP 83761 |
19.30 |
| 2026-02-11 00:00 |
17:07:01.26 |
-19:49:23.7 |
HIP 83761 |
19.09 |
| 2026-02-11 12:00 |
17:07:12.13 |
-19:49:31.6 |
HIP 83761 |
19.23 |
| 2026-02-12 00:00 |
17:07:22.89 |
-19:49:39.4 |
HIP 83761 |
19.69 |
| 2026-02-12 12:00 |
17:07:33.56 |
-19:49:46.9 |
HIP 83761 |
20.44 |
| 2026-02-13 00:00 |
17:07:44.11 |
-19:49:54.3 |
HIP 83761 |
21.45 |
| 2026-02-13 12:00 |
17:07:54.57 |
-19:50:01.4 |
HIP 83923 |
19.75 |
| 2026-02-14 00:00 |
17:08:04.92 |
-19:50:08.2 |
HIP 83923 |
17.69 |
| 2026-02-14 12:00 |
17:08:15.16 |
-19:50:14.9 |
HIP 83923 |
15.76 |
| 2026-02-15 00:00 |
17:08:25.29 |
-19:50:21.3 |
HIP 83923 |
13.99 |
| 2026-02-15 12:00 |
17:08:35.32 |
-19:50:27.5 |
HIP 83923 |
12.45 |
| 2026-02-16 00:00 |
17:08:45.25 |
-19:50:33.5 |
HIP 83923 |
11.21 |
| 2026-02-16 12:00 |
17:08:55.06 |
-19:50:39.3 |
HIP 83923 |
10.35 |
| 2026-02-17 00:00 |
17:09:04.77 |
-19:50:44.8 |
HIP 83923 |
9.97 |
| 2026-02-17 12:00 |
17:09:14.36 |
-19:50:50.2 |
HIP 83923 |
10.09 |
| 2026-02-18 00:00 |
17:09:23.85 |
-19:50:55.3 |
HIP 83923 |
10.69 |
| 2026-02-18 12:00 |
17:09:33.23 |
-19:51:00.3 |
HIP 83923 |
11.68 |
| 2026-02-19 00:00 |
17:09:42.49 |
-19:51:05.0 |
HIP 83923 |
12.95 |
| 2026-02-19 12:00 |
17:09:51.64 |
-19:51:09.5 |
HIP 83923 |
14.42 |
| 2026-02-20 00:00 |
17:10:00.68 |
-19:51:13.8 |
HIP 83923 |
16.03 |
| 2026-02-20 12:00 |
17:10:09.61 |
-19:51:17.9 |
HIP 83923 |
17.72 |
| 2026-02-21 00:00 |
17:10:18.43 |
-19:51:21.8 |
HIP 83923 |
19.46 |
| 2026-02-21 12:00 |
17:10:27.13 |
-19:51:25.4 |
HIP 83923 |
21.24 |
| 2026-02-22 00:00 |
17:10:35.71 |
-19:51:28.9 |
HIP 83923 |
23.04 |
| 2026-02-22 12:00 |
17:10:44.18 |
-19:51:32.2 |
HIP 83923 |
24.85 |
| 2026-02-23 00:00 |
17:10:52.54 |
-19:51:35.3 |
HIP 83923 |
26.66 |
| 2026-02-23 12:00 |
17:11:00.78 |
-19:51:38.2 |
HIP 83998 |
27.65 |
| 2026-02-24 00:00 |
17:11:08.91 |
-19:51:40.8 |
HIP 83998 |
28.49 |