| Parameter |
Value |
| Designation |
C/2020 N1 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-03-12T05:28:54.451200Z |
| Orbit solution date (soln_date, UTC) |
2022-04-08T01:42:44Z |
| Obs used |
856 |
| NEO |
- |
| M1 |
15.500 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-07-03T13:50:17.635200Z |
| Discovery magnitude (MPC) |
20.75 i |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-11-27.0000000 |
| e |
1.00050582 |
| q (au) |
1.320692 |
| a (au) |
-2610.973764 |
| i (deg) |
29.703772 |
| Ω (om, deg) |
279.981658 |
| ω (w, deg) |
186.772725 |
| M (ma, deg) |
-0.000777 |
Magnitude
Scatter + Global Linear
$$
M_a = (16.174 + 3.247\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
16.174 |
| n |
3.247 |
| gf |
1.000 |
| gb |
-0.862 |
| 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) |
| 2026-09-20 00:00 |
16:39:40.60 |
-34:47:30.9 |
HIP 81545 |
6.95 |
| 2026-09-20 12:00 |
16:39:44.01 |
-34:47:09.6 |
HIP 81545 |
7.69 |
| 2026-09-21 00:00 |
16:39:47.49 |
-34:46:48.5 |
HIP 81545 |
8.44 |
| 2026-09-21 12:00 |
16:39:51.03 |
-34:46:27.6 |
HIP 81545 |
9.21 |
| 2026-09-22 00:00 |
16:39:54.63 |
-34:46:06.9 |
HIP 81545 |
9.99 |
| 2026-09-22 12:00 |
16:39:58.30 |
-34:45:46.3 |
HIP 81545 |
10.79 |
| 2026-09-23 00:00 |
16:40:02.04 |
-34:45:26.0 |
HIP 81545 |
11.59 |
| 2026-09-23 12:00 |
16:40:05.84 |
-34:45:05.9 |
HIP 81545 |
12.41 |
| 2026-09-24 00:00 |
16:40:09.70 |
-34:44:46.0 |
HIP 81545 |
13.25 |
| 2026-09-24 12:00 |
16:40:13.62 |
-34:44:26.2 |
HIP 81545 |
14.09 |
| 2026-09-25 00:00 |
16:40:17.61 |
-34:44:06.7 |
HIP 81545 |
14.95 |
| 2026-09-25 12:00 |
16:40:21.66 |
-34:43:47.4 |
HIP 81545 |
15.81 |
| 2026-09-26 00:00 |
16:40:25.77 |
-34:43:28.2 |
HIP 81545 |
16.69 |
| 2026-09-26 12:00 |
16:40:29.95 |
-34:43:09.3 |
HIP 81545 |
17.58 |
| 2026-09-27 00:00 |
16:40:34.18 |
-34:42:50.5 |
HIP 81545 |
18.49 |
| 2026-09-27 12:00 |
16:40:38.48 |
-34:42:32.0 |
HIP 81545 |
19.40 |
| 2026-09-28 00:00 |
16:40:42.84 |
-34:42:13.6 |
HIP 81545 |
20.32 |
| 2026-09-28 12:00 |
16:40:47.26 |
-34:41:55.5 |
HIP 81545 |
21.26 |
| 2026-09-29 00:00 |
16:40:51.74 |
-34:41:37.5 |
HIP 81772 |
21.06 |
| 2026-09-29 12:00 |
16:40:56.28 |
-34:41:19.8 |
HIP 81772 |
20.17 |
| 2026-09-30 00:00 |
16:41:00.88 |
-34:41:02.2 |
HIP 81772 |
19.28 |
| 2026-09-30 12:00 |
16:41:05.54 |
-34:40:44.9 |
HIP 81772 |
18.39 |
| 2026-10-01 00:00 |
16:41:10.26 |
-34:40:27.7 |
HIP 81772 |
17.51 |
| 2026-10-01 12:00 |
16:41:15.04 |
-34:40:10.7 |
HIP 81772 |
16.64 |
| 2026-10-02 00:00 |
16:41:19.87 |
-34:39:54.0 |
HIP 81772 |
15.78 |
| 2026-10-02 12:00 |
16:41:24.77 |
-34:39:37.4 |
HIP 81772 |
14.94 |
| 2026-10-03 00:00 |
16:41:29.72 |
-34:39:21.1 |
HIP 81772 |
14.12 |
| 2026-10-03 12:00 |
16:41:34.73 |
-34:39:04.9 |
HIP 81772 |
13.33 |
| 2026-10-04 00:00 |
16:41:39.80 |
-34:38:49.0 |
HIP 81772 |
12.59 |
| 2026-10-04 12:00 |
16:41:44.93 |
-34:38:33.2 |
HIP 81772 |
11.89 |
| 2026-10-05 00:00 |
16:41:50.11 |
-34:38:17.7 |
HIP 81772 |
11.25 |
| 2026-10-05 12:00 |
16:41:55.35 |
-34:38:02.4 |
HIP 81772 |
10.68 |
| 2026-10-06 00:00 |
16:42:00.65 |
-34:37:47.2 |
HIP 81772 |
10.21 |
| 2026-10-06 12:00 |
16:42:06.00 |
-34:37:32.3 |
HIP 81772 |
9.84 |
| 2026-10-07 00:00 |
16:42:11.41 |
-34:37:17.6 |
HIP 81772 |
9.60 |
| 2026-10-07 12:00 |
16:42:16.87 |
-34:37:03.0 |
HIP 81772 |
9.50 |
| 2026-10-08 00:00 |
16:42:22.39 |
-34:36:48.7 |
HIP 81772 |
9.54 |
| 2026-10-08 12:00 |
16:42:27.96 |
-34:36:34.6 |
HIP 81772 |
9.73 |
| 2026-10-09 00:00 |
16:42:33.58 |
-34:36:20.7 |
HIP 81772 |
10.06 |
| 2026-10-09 12:00 |
16:42:39.26 |
-34:36:06.9 |
HIP 81772 |
10.52 |
| 2026-10-10 00:00 |
16:42:45.00 |
-34:35:53.4 |
HIP 81772 |
11.11 |
| 2026-10-10 12:00 |
16:42:50.79 |
-34:35:40.1 |
HIP 81772 |
11.79 |
| 2026-10-11 00:00 |
16:42:56.62 |
-34:35:27.0 |
HIP 81772 |
12.57 |