C/2022 S3 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
14:07:33.75 |
+50:36:22.2 |
HIP 69114 |
12.52 |
| 2026-02-03 12:00 |
14:07:32.26 |
+50:39:04.7 |
HIP 69114 |
12.81 |
| 2026-02-04 00:00 |
14:07:30.63 |
+50:41:47.2 |
HIP 69114 |
13.66 |
| 2026-02-04 12:00 |
14:07:28.84 |
+50:44:29.7 |
HIP 69114 |
14.99 |
| 2026-02-05 00:00 |
14:07:26.92 |
+50:47:12.1 |
HIP 69114 |
16.68 |
| 2026-02-05 12:00 |
14:07:24.84 |
+50:49:54.4 |
HIP 69114 |
18.63 |
| 2026-02-06 00:00 |
14:07:22.62 |
+50:52:36.7 |
HIP 69114 |
20.77 |
| 2026-02-06 12:00 |
14:07:20.25 |
+50:55:18.9 |
HIP 69114 |
23.05 |
| 2026-02-07 00:00 |
14:07:17.73 |
+50:58:01.0 |
HIP 69114 |
25.42 |
| 2026-02-07 12:00 |
14:07:15.07 |
+51:00:43.0 |
HIP 69114 |
27.88 |
| 2026-02-08 00:00 |
14:07:12.25 |
+51:03:24.8 |
HIP 68777 |
29.89 |
| 2026-02-08 12:00 |
14:07:09.29 |
+51:06:06.6 |
HIP 68777 |
27.97 |
| 2026-02-09 00:00 |
14:07:06.18 |
+51:08:48.1 |
HIP 68777 |
26.19 |
| 2026-02-09 12:00 |
14:07:02.93 |
+51:11:29.5 |
HIP 68777 |
24.55 |
| 2026-02-10 00:00 |
14:06:59.52 |
+51:14:10.7 |
HIP 68777 |
23.11 |
| 2026-02-10 12:00 |
14:06:55.97 |
+51:16:51.7 |
HIP 68777 |
21.90 |
| 2026-02-11 00:00 |
14:06:52.27 |
+51:19:32.5 |
HIP 68777 |
20.95 |
| 2026-02-11 12:00 |
14:06:48.42 |
+51:22:13.1 |
HIP 68777 |
20.31 |
| 2026-02-12 00:00 |
14:06:44.42 |
+51:24:53.4 |
HIP 69089 |
19.25 |
| 2026-02-12 12:00 |
14:06:40.28 |
+51:27:33.5 |
HIP 69089 |
18.48 |
| 2026-02-13 00:00 |
14:06:35.99 |
+51:30:13.3 |
HIP 69089 |
18.13 |
| 2026-02-13 12:00 |
14:06:31.55 |
+51:32:52.8 |
HIP 69089 |
18.21 |
| 2026-02-14 00:00 |
14:06:26.96 |
+51:35:32.1 |
HIP 69089 |
18.71 |
| 2026-02-14 12:00 |
14:06:22.22 |
+51:38:11.0 |
HIP 69089 |
19.62 |
| 2026-02-15 00:00 |
14:06:17.34 |
+51:40:49.6 |
HIP 69089 |
20.87 |
| 2026-02-15 12:00 |
14:06:12.31 |
+51:43:27.8 |
HIP 69089 |
22.40 |
| 2026-02-16 00:00 |
14:06:07.13 |
+51:46:05.7 |
HIP 69089 |
24.17 |
| 2026-02-16 12:00 |
14:06:01.81 |
+51:48:43.2 |
HIP 68962 |
25.79 |
| 2026-02-17 00:00 |
14:05:56.34 |
+51:51:20.3 |
HIP 68962 |
23.73 |
| 2026-02-17 12:00 |
14:05:50.72 |
+51:53:57.0 |
HIP 68962 |
21.82 |
| 2026-02-18 00:00 |
14:05:44.96 |
+51:56:33.3 |
HIP 68962 |
20.14 |
| 2026-02-18 12:00 |
14:05:39.05 |
+51:59:09.2 |
HIP 68962 |
18.72 |
| 2026-02-19 00:00 |
14:05:32.99 |
+52:01:44.6 |
HIP 68962 |
17.65 |
| 2026-02-19 12:00 |
14:05:26.80 |
+52:04:19.5 |
HIP 68962 |
16.98 |
| 2026-02-20 00:00 |
14:05:20.45 |
+52:06:54.0 |
HIP 68962 |
16.77 |
| 2026-02-20 12:00 |
14:05:13.97 |
+52:09:28.0 |
HIP 68766 |
16.98 |
| 2026-02-21 00:00 |
14:05:07.33 |
+52:12:01.4 |
HIP 68766 |
14.23 |
| 2026-02-21 12:00 |
14:05:00.56 |
+52:14:34.4 |
HIP 68766 |
11.48 |
| 2026-02-22 00:00 |
14:04:53.65 |
+52:17:06.8 |
HIP 68766 |
8.73 |
| 2026-02-22 12:00 |
14:04:46.59 |
+52:19:38.6 |
HIP 68766 |
5.99 |
| 2026-02-23 00:00 |
14:04:39.39 |
+52:22:09.9 |
HIP 68766 |
3.25 |
| 2026-02-23 12:00 |
14:04:32.05 |
+52:24:40.6 |
HIP 68766 |
0.63 |
| 2026-02-24 00:00 |
14:04:24.57 |
+52:27:10.8 |
HIP 68766 |
2.31 |