| Parameter |
Value |
| Designation |
C/2022 S5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2022-11-27T11:05:05.619840Z |
| Orbit solution date (soln_date, UTC) |
2023-04-21T18:43:35Z |
| Obs used |
100 |
| NEO |
- |
| M1 |
12.600 |
| K1 |
17.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2022-09-24T12:06:49.190400Z |
| Discovery magnitude (MPC) |
19.57 w |
| Discovery observatory (MPC) |
F52 · Pan-STARRS 2, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2022-10-08.0000000 |
| e |
0.89345955 |
| q (au) |
2.178764 |
| a (au) |
20.450111 |
| i (deg) |
136.530929 |
| Ω (om, deg) |
214.856203 |
| ω (w, deg) |
232.775257 |
| M (ma, deg) |
359.462196 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.631 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.631 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-09-20 00:00 |
13:47:16.86 |
-06:23:29.2 |
HIP 67285 |
15.45 |
| 2026-09-20 12:00 |
13:47:24.26 |
-06:23:56.3 |
HIP 67285 |
15.81 |
| 2026-09-21 00:00 |
13:47:31.70 |
-06:24:23.6 |
HIP 67285 |
16.39 |
| 2026-09-21 12:00 |
13:47:39.16 |
-06:24:50.9 |
HIP 67285 |
17.16 |
| 2026-09-22 00:00 |
13:47:46.66 |
-06:25:18.4 |
HIP 67289 |
17.82 |
| 2026-09-22 12:00 |
13:47:54.19 |
-06:25:46.0 |
HIP 67289 |
18.03 |
| 2026-09-23 00:00 |
13:48:01.75 |
-06:26:13.6 |
HIP 67289 |
18.45 |
| 2026-09-23 12:00 |
13:48:09.34 |
-06:26:41.4 |
HIP 67289 |
19.07 |
| 2026-09-24 00:00 |
13:48:16.96 |
-06:27:09.2 |
HIP 67289 |
19.85 |
| 2026-09-24 12:00 |
13:48:24.61 |
-06:27:37.1 |
HIP 67289 |
20.80 |
| 2026-09-25 00:00 |
13:48:32.29 |
-06:28:05.1 |
HIP 67289 |
21.88 |
| 2026-09-25 12:00 |
13:48:40.00 |
-06:28:33.2 |
HIP 67355 |
22.36 |
| 2026-09-26 00:00 |
13:48:47.74 |
-06:29:01.3 |
HIP 67355 |
22.47 |
| 2026-09-26 12:00 |
13:48:55.51 |
-06:29:29.5 |
HIP 67355 |
22.74 |
| 2026-09-27 00:00 |
13:49:03.30 |
-06:29:57.8 |
HIP 67355 |
23.19 |
| 2026-09-27 12:00 |
13:49:11.12 |
-06:30:26.1 |
HIP 67355 |
23.79 |
| 2026-09-28 00:00 |
13:49:18.97 |
-06:30:54.6 |
HIP 67355 |
24.55 |
| 2026-09-28 12:00 |
13:49:26.85 |
-06:31:23.0 |
HIP 67355 |
25.45 |
| 2026-09-29 00:00 |
13:49:34.74 |
-06:31:51.5 |
HIP 67355 |
26.47 |
| 2026-09-29 12:00 |
13:49:42.67 |
-06:32:20.1 |
HIP 67355 |
27.61 |
| 2026-09-30 00:00 |
13:49:50.62 |
-06:32:48.7 |
HIP 67355 |
28.85 |
| 2026-09-30 12:00 |
13:49:58.59 |
-06:33:17.4 |
HIP 67355 |
30.18 |
| 2026-10-01 00:00 |
13:50:06.59 |
-06:33:46.1 |
HIP 67355 |
31.59 |
| 2026-10-01 12:00 |
13:50:14.61 |
-06:34:14.9 |
HIP 67355 |
33.07 |
| 2026-10-02 00:00 |
13:50:22.65 |
-06:34:43.6 |
HIP 67355 |
34.62 |
| 2026-10-02 12:00 |
13:50:30.71 |
-06:35:12.5 |
HIP 67559 |
35.02 |
| 2026-10-03 00:00 |
13:50:38.80 |
-06:35:41.3 |
HIP 67765 |
34.22 |
| 2026-10-03 12:00 |
13:50:46.91 |
-06:36:10.2 |
HIP 67765 |
32.34 |
| 2026-10-04 00:00 |
13:50:55.04 |
-06:36:39.1 |
HIP 67765 |
30.48 |
| 2026-10-04 12:00 |
13:51:03.19 |
-06:37:08.0 |
HIP 67765 |
28.65 |
| 2026-10-05 00:00 |
13:51:11.35 |
-06:37:36.9 |
HIP 67765 |
26.85 |
| 2026-10-05 12:00 |
13:51:19.54 |
-06:38:05.8 |
HIP 67765 |
25.09 |
| 2026-10-06 00:00 |
13:51:27.75 |
-06:38:34.8 |
HIP 67765 |
23.38 |
| 2026-10-06 12:00 |
13:51:35.97 |
-06:39:03.7 |
HIP 67765 |
21.73 |
| 2026-10-07 00:00 |
13:51:44.22 |
-06:39:32.6 |
HIP 67765 |
20.16 |
| 2026-10-07 12:00 |
13:51:52.48 |
-06:40:01.6 |
HIP 67765 |
18.69 |
| 2026-10-08 00:00 |
13:52:00.75 |
-06:40:30.5 |
HIP 67765 |
17.36 |
| 2026-10-08 12:00 |
13:52:09.04 |
-06:40:59.4 |
HIP 67765 |
16.18 |
| 2026-10-09 00:00 |
13:52:17.35 |
-06:41:28.3 |
HIP 67765 |
15.21 |
| 2026-10-09 12:00 |
13:52:25.67 |
-06:41:57.2 |
HIP 67765 |
14.48 |
| 2026-10-10 00:00 |
13:52:34.01 |
-06:42:26.1 |
HIP 67765 |
14.04 |
| 2026-10-10 12:00 |
13:52:42.36 |
-06:42:54.9 |
HIP 67765 |
13.91 |
| 2026-10-11 00:00 |
13:52:50.72 |
-06:43:23.7 |
HIP 67765 |
14.10 |