| Parameter |
Value |
| Designation |
P/2020 M1 (PANSTARRS) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-12-21T02:45:38.859840Z |
| Orbit solution date (soln_date, UTC) |
2023-02-06T22:13:22Z |
| Obs used |
51 |
| NEO |
- |
| M1 |
12.400 |
| K1 |
15.750 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-06-17T08:46:29.568000Z |
| Discovery magnitude (MPC) |
21.30 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-06-01.0000000 |
| e |
0.47691810 |
| q (au) |
2.660801 |
| a (au) |
5.086778 |
| i (deg) |
8.632593 |
| Ω (om, deg) |
142.955182 |
| ω (w, deg) |
67.851133 |
| M (ma, deg) |
13.993326 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.862 + 5.819\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.862 |
| n |
5.819 |
| gf |
1.000 |
| gb |
-0.638 |
| k |
0.800 |
| 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) |
| 2026-05-12 00:00 |
02:38:00.07 |
+07:42:08.0 |
HIP 12272 |
0.44 |
| 2026-05-12 12:00 |
02:38:16.11 |
+07:43:18.7 |
HIP 12272 |
4.13 |
| 2026-05-13 00:00 |
02:38:32.14 |
+07:44:29.1 |
HIP 12272 |
8.26 |
| 2026-05-13 12:00 |
02:38:48.15 |
+07:45:39.2 |
HIP 12272 |
12.40 |
| 2026-05-14 00:00 |
02:39:04.16 |
+07:46:48.9 |
HIP 12420 |
15.06 |
| 2026-05-14 12:00 |
02:39:20.16 |
+07:47:58.3 |
HIP 12420 |
13.13 |
| 2026-05-15 00:00 |
02:39:36.14 |
+07:49:07.4 |
HIP 12420 |
12.32 |
| 2026-05-15 12:00 |
02:39:52.12 |
+07:50:16.1 |
HIP 12420 |
12.84 |
| 2026-05-16 00:00 |
02:40:08.07 |
+07:51:24.5 |
HIP 12420 |
14.56 |
| 2026-05-16 12:00 |
02:40:24.02 |
+07:52:32.6 |
HIP 12420 |
17.11 |
| 2026-05-17 00:00 |
02:40:39.95 |
+07:53:40.3 |
HIP 12420 |
20.17 |
| 2026-05-17 12:00 |
02:40:55.86 |
+07:54:47.7 |
HIP 12505 |
19.62 |
| 2026-05-18 00:00 |
02:41:11.76 |
+07:55:54.7 |
HIP 12505 |
18.99 |
| 2026-05-18 12:00 |
02:41:27.64 |
+07:57:01.4 |
HIP 12505 |
19.23 |
| 2026-05-19 00:00 |
02:41:43.50 |
+07:58:07.7 |
HIP 12505 |
20.31 |
| 2026-05-19 12:00 |
02:41:59.35 |
+07:59:13.7 |
HIP 12505 |
22.10 |
| 2026-05-20 00:00 |
02:42:15.17 |
+08:00:19.3 |
HIP 12505 |
24.45 |
| 2026-05-20 12:00 |
02:42:30.98 |
+08:01:24.5 |
HIP 12505 |
27.20 |
| 2026-05-21 00:00 |
02:42:46.77 |
+08:02:29.4 |
HIP 12505 |
30.24 |
| 2026-05-21 12:00 |
02:43:02.53 |
+08:03:33.9 |
HIP 12505 |
33.50 |
| 2026-05-22 00:00 |
02:43:18.28 |
+08:04:38.1 |
HIP 12807 |
30.80 |
| 2026-05-22 12:00 |
02:43:34.00 |
+08:05:41.9 |
HIP 12807 |
27.67 |
| 2026-05-23 00:00 |
02:43:49.70 |
+08:06:45.3 |
HIP 12807 |
24.80 |
| 2026-05-23 12:00 |
02:44:05.38 |
+08:07:48.3 |
HIP 12807 |
22.31 |
| 2026-05-24 00:00 |
02:44:21.04 |
+08:08:51.0 |
HIP 12807 |
20.32 |
| 2026-05-24 12:00 |
02:44:36.67 |
+08:09:53.3 |
HIP 12807 |
18.98 |
| 2026-05-25 00:00 |
02:44:52.28 |
+08:10:55.2 |
HIP 12807 |
18.44 |
| 2026-05-25 12:00 |
02:45:07.86 |
+08:11:56.7 |
HIP 12807 |
18.76 |
| 2026-05-26 00:00 |
02:45:23.41 |
+08:12:57.8 |
HIP 12807 |
19.89 |
| 2026-05-26 12:00 |
02:45:38.94 |
+08:13:58.6 |
HIP 12807 |
21.70 |
| 2026-05-27 00:00 |
02:45:54.45 |
+08:14:59.0 |
HIP 12807 |
24.04 |
| 2026-05-27 12:00 |
02:46:09.92 |
+08:15:59.0 |
HIP 12807 |
26.75 |
| 2026-05-28 00:00 |
02:46:25.37 |
+08:16:58.5 |
HIP 12807 |
29.75 |
| 2026-05-28 12:00 |
02:46:40.79 |
+08:17:57.7 |
HIP 12807 |
32.94 |
| 2026-05-29 00:00 |
02:46:56.18 |
+08:18:56.5 |
HIP 12986 |
34.12 |
| 2026-05-29 12:00 |
02:47:11.55 |
+08:19:55.0 |
HIP 12986 |
35.18 |
| 2026-05-30 00:00 |
02:47:26.88 |
+08:20:53.0 |
HIP 13068 |
34.00 |
| 2026-05-30 12:00 |
02:47:42.18 |
+08:21:50.6 |
HIP 13068 |
32.37 |
| 2026-05-31 00:00 |
02:47:57.45 |
+08:22:47.8 |
HIP 13068 |
31.16 |
| 2026-05-31 12:00 |
02:48:12.69 |
+08:23:44.6 |
HIP 13068 |
30.40 |
| 2026-06-01 00:00 |
02:48:27.90 |
+08:24:41.0 |
HIP 13068 |
30.13 |
| 2026-06-01 12:00 |
02:48:43.08 |
+08:25:37.0 |
HIP 13110 |
29.66 |
| 2026-06-02 00:00 |
02:48:58.22 |
+08:26:32.6 |
HIP 13110 |
29.27 |