| Parameter |
Value |
| Designation |
C/2022 P3 (ZTF) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-07-27T08:05:13.447680Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:32Z |
| Obs used |
327 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-08-02T11:44:20.832000Z |
| Discovery magnitude (MPC) |
19.41 r |
| Discovery observatory (MPC) |
I41 · Palomar Mountain–ZTF |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-21.0000000 |
| e |
0.98947115 |
| q (au) |
2.561259 |
| a (au) |
243.261099 |
| i (deg) |
59.518749 |
| Ω (om, deg) |
72.234767 |
| ω (w, deg) |
0.090034 |
| M (ma, deg) |
0.022253 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.366 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.366 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.999 |
| k |
1.000 |
| δ90 |
9.999 |
| 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) |
| 2026-07-29 00:00 |
14:58:21.95 |
+29:45:15.0 |
HIP 73224 |
9.57 |
| 2026-07-29 12:00 |
14:58:21.20 |
+29:43:10.9 |
HIP 73224 |
11.14 |
| 2026-07-30 00:00 |
14:58:20.54 |
+29:41:06.6 |
HIP 73224 |
12.87 |
| 2026-07-30 12:00 |
14:58:19.97 |
+29:39:02.0 |
HIP 73220 |
12.65 |
| 2026-07-31 00:00 |
14:58:19.49 |
+29:36:57.2 |
HIP 73220 |
10.83 |
| 2026-07-31 12:00 |
14:58:19.10 |
+29:34:52.2 |
HIP 73220 |
9.13 |
| 2026-08-01 00:00 |
14:58:18.80 |
+29:32:47.1 |
HIP 73220 |
7.63 |
| 2026-08-01 12:00 |
14:58:18.59 |
+29:30:41.7 |
HIP 73220 |
6.49 |
| 2026-08-02 00:00 |
14:58:18.46 |
+29:28:36.2 |
HIP 73220 |
5.92 |
| 2026-08-02 12:00 |
14:58:18.43 |
+29:26:30.5 |
HIP 73220 |
6.07 |
| 2026-08-03 00:00 |
14:58:18.48 |
+29:24:24.7 |
HIP 73220 |
6.91 |
| 2026-08-03 12:00 |
14:58:18.62 |
+29:22:18.7 |
HIP 73220 |
8.22 |
| 2026-08-04 00:00 |
14:58:18.85 |
+29:20:12.5 |
HIP 73220 |
9.83 |
| 2026-08-04 12:00 |
14:58:19.17 |
+29:18:06.2 |
HIP 73220 |
11.61 |
| 2026-08-05 00:00 |
14:58:19.58 |
+29:15:59.8 |
HIP 73220 |
13.49 |
| 2026-08-05 12:00 |
14:58:20.07 |
+29:13:53.2 |
HIP 73220 |
15.44 |
| 2026-08-06 00:00 |
14:58:20.65 |
+29:11:46.5 |
HIP 73220 |
17.44 |
| 2026-08-06 12:00 |
14:58:21.32 |
+29:09:39.7 |
HIP 73220 |
19.47 |
| 2026-08-07 00:00 |
14:58:22.07 |
+29:07:32.8 |
HIP 73220 |
21.53 |
| 2026-08-07 12:00 |
14:58:22.91 |
+29:05:25.8 |
HIP 73220 |
23.60 |
| 2026-08-08 00:00 |
14:58:23.84 |
+29:03:18.7 |
HIP 73220 |
25.69 |
| 2026-08-08 12:00 |
14:58:24.85 |
+29:01:11.5 |
HIP 73220 |
27.79 |
| 2026-08-09 00:00 |
14:58:25.96 |
+28:59:04.2 |
HIP 73220 |
29.91 |
| 2026-08-09 12:00 |
14:58:27.14 |
+28:56:56.8 |
HIP 73220 |
32.03 |
| 2026-08-10 00:00 |
14:58:28.42 |
+28:54:49.4 |
HIP 73113 |
32.78 |
| 2026-08-10 12:00 |
14:58:29.78 |
+28:52:41.9 |
HIP 73113 |
31.71 |
| 2026-08-11 00:00 |
14:58:31.22 |
+28:50:34.3 |
HIP 73113 |
30.76 |
| 2026-08-11 12:00 |
14:58:32.75 |
+28:48:26.7 |
HIP 73113 |
29.96 |
| 2026-08-12 00:00 |
14:58:34.37 |
+28:46:19.1 |
HIP 73113 |
29.31 |
| 2026-08-12 12:00 |
14:58:36.07 |
+28:44:11.4 |
HIP 73113 |
28.83 |
| 2026-08-13 00:00 |
14:58:37.86 |
+28:42:03.8 |
HIP 73113 |
28.52 |
| 2026-08-13 12:00 |
14:58:39.73 |
+28:39:56.1 |
HIP 73461 |
28.20 |
| 2026-08-14 00:00 |
14:58:41.68 |
+28:37:48.3 |
HIP 73461 |
27.52 |
| 2026-08-14 12:00 |
14:58:43.72 |
+28:35:40.6 |
HIP 73461 |
26.98 |
| 2026-08-15 00:00 |
14:58:45.84 |
+28:33:32.9 |
HIP 73461 |
26.59 |
| 2026-08-15 12:00 |
14:58:48.05 |
+28:31:25.2 |
HIP 73461 |
26.36 |
| 2026-08-16 00:00 |
14:58:50.33 |
+28:29:17.6 |
HIP 73461 |
26.28 |
| 2026-08-16 12:00 |
14:58:52.70 |
+28:27:09.9 |
HIP 73461 |
26.38 |
| 2026-08-17 00:00 |
14:58:55.16 |
+28:25:02.3 |
HIP 73461 |
26.63 |
| 2026-08-17 12:00 |
14:58:57.69 |
+28:22:54.7 |
HIP 73461 |
27.05 |
| 2026-08-18 00:00 |
14:59:00.30 |
+28:20:47.2 |
HIP 73461 |
27.61 |
| 2026-08-18 12:00 |
14:59:03.00 |
+28:18:39.7 |
HIP 73461 |
28.33 |
| 2026-08-19 00:00 |
14:59:05.78 |
+28:16:32.3 |
HIP 73218 |
28.19 |