| Parameter |
Value |
| Designation |
C/2022 S3 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-01-21T16:27:20.963520Z |
| Orbit solution date (soln_date, UTC) |
2022-11-10T22:12:52Z |
| Obs used |
75 |
| NEO |
- |
| M1 |
13.900 |
| K1 |
18.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-25T06:08:52.569600Z |
| Discovery magnitude (MPC) |
20.88 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-05.0000000 |
| e |
1.00041119 |
| q (au) |
0.838456 |
| a (au) |
-2039.091991 |
| i (deg) |
78.560279 |
| Ω (om, deg) |
157.321243 |
| ω (w, deg) |
267.959178 |
| M (ma, deg) |
-0.001163 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.426 + 4.862\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.426 |
| n |
4.862 |
| gf |
0.800 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
1.000 |
| 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) |
| 2026-09-20 00:00 |
13:35:50.31 |
+48:29:31.7 |
HIP 66190 |
24.73 |
| 2026-09-20 12:00 |
13:36:02.78 |
+48:28:25.6 |
HIP 66190 |
27.01 |
| 2026-09-21 00:00 |
13:36:15.29 |
+48:27:20.2 |
HIP 66492 |
24.86 |
| 2026-09-21 12:00 |
13:36:27.84 |
+48:26:15.4 |
HIP 66492 |
22.71 |
| 2026-09-22 00:00 |
13:36:40.42 |
+48:25:11.4 |
HIP 66492 |
20.61 |
| 2026-09-22 12:00 |
13:36:53.03 |
+48:24:08.1 |
HIP 66492 |
18.57 |
| 2026-09-23 00:00 |
13:37:05.68 |
+48:23:05.5 |
HIP 66492 |
16.63 |
| 2026-09-23 12:00 |
13:37:18.37 |
+48:22:03.6 |
HIP 66492 |
14.82 |
| 2026-09-24 00:00 |
13:37:31.08 |
+48:21:02.5 |
HIP 66492 |
13.18 |
| 2026-09-24 12:00 |
13:37:43.83 |
+48:20:02.1 |
HIP 66492 |
11.80 |
| 2026-09-25 00:00 |
13:37:56.61 |
+48:19:02.4 |
HIP 66492 |
10.77 |
| 2026-09-25 12:00 |
13:38:09.42 |
+48:18:03.4 |
HIP 66492 |
10.20 |
| 2026-09-26 00:00 |
13:38:22.26 |
+48:17:05.1 |
HIP 66492 |
10.17 |
| 2026-09-26 12:00 |
13:38:35.13 |
+48:16:07.6 |
HIP 66492 |
10.69 |
| 2026-09-27 00:00 |
13:38:48.03 |
+48:15:10.9 |
HIP 66492 |
11.67 |
| 2026-09-27 12:00 |
13:39:00.96 |
+48:14:14.9 |
HIP 66492 |
13.02 |
| 2026-09-28 00:00 |
13:39:13.92 |
+48:13:19.6 |
HIP 66492 |
14.64 |
| 2026-09-28 12:00 |
13:39:26.91 |
+48:12:25.1 |
HIP 66492 |
16.44 |
| 2026-09-29 00:00 |
13:39:39.92 |
+48:11:31.3 |
HIP 66609 |
18.33 |
| 2026-09-29 12:00 |
13:39:52.97 |
+48:10:38.3 |
HIP 66609 |
18.17 |
| 2026-09-30 00:00 |
13:40:06.03 |
+48:09:46.0 |
HIP 66609 |
18.32 |
| 2026-09-30 12:00 |
13:40:19.13 |
+48:08:54.5 |
HIP 66609 |
18.78 |
| 2026-10-01 00:00 |
13:40:32.25 |
+48:08:03.8 |
HIP 66609 |
19.54 |
| 2026-10-01 12:00 |
13:40:45.39 |
+48:07:13.8 |
HIP 66609 |
20.54 |
| 2026-10-02 00:00 |
13:40:58.56 |
+48:06:24.6 |
HIP 66609 |
21.77 |
| 2026-10-02 12:00 |
13:41:11.75 |
+48:05:36.2 |
HIP 66609 |
23.18 |
| 2026-10-03 00:00 |
13:41:24.96 |
+48:04:48.6 |
HIP 66609 |
24.75 |
| 2026-10-03 12:00 |
13:41:38.20 |
+48:04:01.8 |
HIP 66609 |
26.44 |
| 2026-10-04 00:00 |
13:41:51.46 |
+48:03:15.7 |
HIP 66609 |
28.23 |
| 2026-10-04 12:00 |
13:42:04.74 |
+48:02:30.4 |
HIP 66609 |
30.11 |
| 2026-10-05 00:00 |
13:42:18.05 |
+48:01:46.0 |
HIP 66609 |
32.06 |
| 2026-10-05 12:00 |
13:42:31.37 |
+48:01:02.3 |
HIP 66609 |
34.06 |
| 2026-10-06 00:00 |
13:42:44.71 |
+48:00:19.4 |
HIP 66609 |
36.12 |
| 2026-10-06 12:00 |
13:42:58.07 |
+47:59:37.4 |
HIP 66836 |
36.53 |
| 2026-10-07 00:00 |
13:43:11.45 |
+47:58:56.1 |
HIP 66836 |
36.64 |
| 2026-10-07 12:00 |
13:43:24.85 |
+47:58:15.7 |
HIP 66836 |
36.91 |
| 2026-10-08 00:00 |
13:43:38.26 |
+47:57:36.1 |
HIP 66836 |
37.34 |
| 2026-10-08 12:00 |
13:43:51.70 |
+47:56:57.3 |
HIP 67263 |
35.95 |
| 2026-10-09 00:00 |
13:44:05.14 |
+47:56:19.4 |
HIP 67263 |
33.62 |
| 2026-10-09 12:00 |
13:44:18.61 |
+47:55:42.2 |
HIP 67263 |
31.30 |
| 2026-10-10 00:00 |
13:44:32.08 |
+47:55:05.9 |
HIP 67263 |
28.98 |
| 2026-10-10 12:00 |
13:44:45.57 |
+47:54:30.5 |
HIP 67263 |
26.67 |
| 2026-10-11 00:00 |
13:44:59.08 |
+47:53:55.8 |
HIP 67263 |
24.37 |