| 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) |
| 2026-06-01 00:00 |
13:22:23.71 |
+54:38:14.6 |
HIP 65378 |
21.76 |
| 2026-06-01 12:00 |
13:22:14.95 |
+54:36:58.8 |
HIP 65378 |
23.53 |
| 2026-06-02 00:00 |
13:22:06.32 |
+54:35:42.2 |
HIP 65378 |
25.31 |
| 2026-06-02 12:00 |
13:21:57.80 |
+54:34:24.7 |
HIP 65378 |
27.09 |
| 2026-06-03 00:00 |
13:21:49.41 |
+54:33:06.4 |
HIP 65378 |
28.87 |
| 2026-06-03 12:00 |
13:21:41.15 |
+54:31:47.4 |
HIP 65378 |
30.65 |
| 2026-06-04 00:00 |
13:21:33.00 |
+54:30:27.5 |
HIP 65378 |
32.42 |
| 2026-06-04 12:00 |
13:21:24.98 |
+54:29:06.8 |
HIP 65378 |
34.20 |
| 2026-06-05 00:00 |
13:21:17.08 |
+54:27:45.3 |
HIP 65378 |
35.98 |
| 2026-06-05 12:00 |
13:21:09.31 |
+54:26:23.1 |
HIP 65131 |
34.94 |
| 2026-06-06 00:00 |
13:21:01.66 |
+54:25:00.1 |
HIP 65131 |
33.48 |
| 2026-06-06 12:00 |
13:20:54.13 |
+54:23:36.3 |
HIP 65131 |
32.05 |
| 2026-06-07 00:00 |
13:20:46.73 |
+54:22:11.8 |
HIP 65131 |
30.63 |
| 2026-06-07 12:00 |
13:20:39.46 |
+54:20:46.6 |
HIP 65131 |
29.24 |
| 2026-06-08 00:00 |
13:20:32.31 |
+54:19:20.6 |
HIP 65131 |
27.88 |
| 2026-06-08 12:00 |
13:20:25.29 |
+54:17:53.9 |
HIP 65131 |
26.56 |
| 2026-06-09 00:00 |
13:20:18.40 |
+54:16:26.5 |
HIP 65131 |
25.28 |
| 2026-06-09 12:00 |
13:20:11.63 |
+54:14:58.4 |
HIP 65131 |
24.04 |
| 2026-06-10 00:00 |
13:20:04.99 |
+54:13:29.6 |
HIP 65131 |
22.86 |
| 2026-06-10 12:00 |
13:19:58.47 |
+54:12:00.1 |
HIP 65131 |
21.74 |
| 2026-06-11 00:00 |
13:19:52.09 |
+54:10:29.9 |
HIP 65131 |
20.70 |
| 2026-06-11 12:00 |
13:19:45.83 |
+54:08:59.1 |
HIP 65131 |
19.74 |
| 2026-06-12 00:00 |
13:19:39.70 |
+54:07:27.6 |
HIP 65131 |
18.88 |
| 2026-06-12 12:00 |
13:19:33.70 |
+54:05:55.4 |
HIP 65131 |
18.13 |
| 2026-06-13 00:00 |
13:19:27.83 |
+54:04:22.6 |
HIP 65131 |
17.52 |
| 2026-06-13 12:00 |
13:19:22.08 |
+54:02:49.2 |
HIP 65131 |
17.04 |
| 2026-06-14 00:00 |
13:19:16.47 |
+54:01:15.1 |
HIP 65131 |
16.72 |
| 2026-06-14 12:00 |
13:19:10.98 |
+53:59:40.5 |
HIP 65131 |
16.56 |
| 2026-06-15 00:00 |
13:19:05.63 |
+53:58:05.2 |
HIP 65131 |
16.57 |
| 2026-06-15 12:00 |
13:19:00.40 |
+53:56:29.4 |
HIP 65131 |
16.75 |
| 2026-06-16 00:00 |
13:18:55.30 |
+53:54:53.0 |
HIP 65131 |
17.09 |
| 2026-06-16 12:00 |
13:18:50.34 |
+53:53:16.0 |
HIP 65131 |
17.58 |
| 2026-06-17 00:00 |
13:18:45.50 |
+53:51:38.4 |
HIP 65131 |
18.22 |
| 2026-06-17 12:00 |
13:18:40.79 |
+53:50:00.3 |
HIP 65131 |
18.98 |
| 2026-06-18 00:00 |
13:18:36.21 |
+53:48:21.7 |
HIP 65131 |
19.86 |
| 2026-06-18 12:00 |
13:18:31.77 |
+53:46:42.5 |
HIP 65131 |
20.84 |
| 2026-06-19 00:00 |
13:18:27.45 |
+53:45:02.8 |
HIP 65131 |
21.90 |
| 2026-06-19 12:00 |
13:18:23.26 |
+53:43:22.6 |
HIP 65131 |
23.04 |
| 2026-06-20 00:00 |
13:18:19.20 |
+53:41:42.0 |
HIP 65131 |
24.24 |
| 2026-06-20 12:00 |
13:18:15.27 |
+53:40:00.8 |
HIP 65131 |
25.50 |
| 2026-06-21 00:00 |
13:18:11.47 |
+53:38:19.1 |
HIP 64686 |
25.05 |
| 2026-06-21 12:00 |
13:18:07.79 |
+53:36:37.0 |
HIP 64686 |
24.16 |
| 2026-06-22 00:00 |
13:18:04.25 |
+53:34:54.4 |
HIP 64686 |
23.39 |