P/2020 M1 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
01:54:41.11 |
+03:17:50.2 |
HIP 8833 |
18.15 |
| 2026-02-03 12:00 |
01:54:47.82 |
+03:18:55.9 |
HIP 8971 |
19.85 |
| 2026-02-04 00:00 |
01:54:54.64 |
+03:20:02.1 |
HIP 8971 |
17.96 |
| 2026-02-04 12:00 |
01:55:01.56 |
+03:21:08.7 |
HIP 8971 |
16.07 |
| 2026-02-05 00:00 |
01:55:08.59 |
+03:22:15.8 |
HIP 8971 |
14.21 |
| 2026-02-05 12:00 |
01:55:15.72 |
+03:23:23.3 |
HIP 8971 |
12.40 |
| 2026-02-06 00:00 |
01:55:22.95 |
+03:24:31.2 |
HIP 8971 |
10.69 |
| 2026-02-06 12:00 |
01:55:30.29 |
+03:25:39.5 |
HIP 8971 |
9.14 |
| 2026-02-07 00:00 |
01:55:37.72 |
+03:26:48.3 |
HIP 8971 |
7.88 |
| 2026-02-07 12:00 |
01:55:45.26 |
+03:27:57.5 |
HIP 8971 |
7.08 |
| 2026-02-08 00:00 |
01:55:52.90 |
+03:29:07.1 |
HIP 8971 |
6.93 |
| 2026-02-08 12:00 |
01:56:00.64 |
+03:30:17.1 |
HIP 8971 |
7.49 |
| 2026-02-09 00:00 |
01:56:08.48 |
+03:31:27.5 |
HIP 8971 |
8.65 |
| 2026-02-09 12:00 |
01:56:16.41 |
+03:32:38.4 |
HIP 8971 |
10.21 |
| 2026-02-10 00:00 |
01:56:24.45 |
+03:33:49.6 |
HIP 8971 |
12.05 |
| 2026-02-10 12:00 |
01:56:32.59 |
+03:35:01.2 |
HIP 8971 |
14.05 |
| 2026-02-11 00:00 |
01:56:40.82 |
+03:36:13.2 |
HIP 8971 |
16.17 |
| 2026-02-11 12:00 |
01:56:49.15 |
+03:37:25.6 |
HIP 8971 |
18.38 |
| 2026-02-12 00:00 |
01:56:57.58 |
+03:38:38.3 |
HIP 8971 |
20.66 |
| 2026-02-12 12:00 |
01:57:06.10 |
+03:39:51.4 |
HIP 9156 |
20.26 |
| 2026-02-13 00:00 |
01:57:14.72 |
+03:41:04.9 |
HIP 9156 |
18.00 |
| 2026-02-13 12:00 |
01:57:23.44 |
+03:42:18.8 |
HIP 9156 |
15.78 |
| 2026-02-14 00:00 |
01:57:32.25 |
+03:43:33.0 |
HIP 9156 |
13.65 |
| 2026-02-14 12:00 |
01:57:41.15 |
+03:44:47.6 |
HIP 9156 |
11.65 |
| 2026-02-15 00:00 |
01:57:50.15 |
+03:46:02.5 |
HIP 9156 |
9.91 |
| 2026-02-15 12:00 |
01:57:59.24 |
+03:47:17.7 |
HIP 9156 |
8.58 |
| 2026-02-16 00:00 |
01:58:08.43 |
+03:48:33.3 |
HIP 9156 |
7.91 |
| 2026-02-16 12:00 |
01:58:17.70 |
+03:49:49.3 |
HIP 9156 |
8.08 |
| 2026-02-17 00:00 |
01:58:27.07 |
+03:51:05.5 |
HIP 9156 |
9.08 |
| 2026-02-17 12:00 |
01:58:36.52 |
+03:52:22.1 |
HIP 9156 |
10.67 |
| 2026-02-18 00:00 |
01:58:46.07 |
+03:53:39.0 |
HIP 9156 |
12.67 |
| 2026-02-18 12:00 |
01:58:55.71 |
+03:54:56.2 |
HIP 9156 |
14.91 |
| 2026-02-19 00:00 |
01:59:05.43 |
+03:56:13.7 |
HIP 9156 |
17.31 |
| 2026-02-19 12:00 |
01:59:15.25 |
+03:57:31.5 |
HIP 9156 |
19.82 |
| 2026-02-20 00:00 |
01:59:25.15 |
+03:58:49.6 |
HIP 9410 |
22.19 |
| 2026-02-20 12:00 |
01:59:35.14 |
+04:00:08.0 |
HIP 9410 |
19.60 |
| 2026-02-21 00:00 |
01:59:45.21 |
+04:01:26.7 |
HIP 9410 |
17.06 |
| 2026-02-21 12:00 |
01:59:55.37 |
+04:02:45.6 |
HIP 9410 |
14.62 |
| 2026-02-22 00:00 |
02:00:05.61 |
+04:04:04.8 |
HIP 9410 |
12.33 |
| 2026-02-22 12:00 |
02:00:15.94 |
+04:05:24.3 |
HIP 9410 |
10.32 |
| 2026-02-23 00:00 |
02:00:26.35 |
+04:06:44.1 |
HIP 9410 |
8.80 |
| 2026-02-23 12:00 |
02:00:36.85 |
+04:08:04.1 |
HIP 9410 |
8.09 |
| 2026-02-24 00:00 |
02:00:47.42 |
+04:09:24.4 |
HIP 9410 |
8.40 |