C/2020 N1 (PANSTARRS)
| 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) |
| 2026-02-03 00:00 |
17:04:42.92 |
-35:46:46.9 |
HIP 83733 |
26.14 |
| 2026-02-03 12:00 |
17:04:48.94 |
-35:47:09.9 |
HIP 83733 |
24.87 |
| 2026-02-04 00:00 |
17:04:54.89 |
-35:47:33.0 |
HIP 83733 |
23.60 |
| 2026-02-04 12:00 |
17:05:00.78 |
-35:47:56.1 |
HIP 83733 |
22.35 |
| 2026-02-05 00:00 |
17:05:06.61 |
-35:48:19.2 |
HIP 83733 |
21.11 |
| 2026-02-05 12:00 |
17:05:12.36 |
-35:48:42.4 |
HIP 83733 |
19.89 |
| 2026-02-06 00:00 |
17:05:18.06 |
-35:49:05.6 |
HIP 83733 |
18.67 |
| 2026-02-06 12:00 |
17:05:23.68 |
-35:49:28.9 |
HIP 83733 |
17.48 |
| 2026-02-07 00:00 |
17:05:29.24 |
-35:49:52.1 |
HIP 83733 |
16.29 |
| 2026-02-07 12:00 |
17:05:34.73 |
-35:50:15.4 |
HIP 83733 |
15.13 |
| 2026-02-08 00:00 |
17:05:40.15 |
-35:50:38.7 |
HIP 83733 |
13.97 |
| 2026-02-08 12:00 |
17:05:45.50 |
-35:51:02.1 |
HIP 83733 |
12.83 |
| 2026-02-09 00:00 |
17:05:50.78 |
-35:51:25.5 |
HIP 83733 |
11.71 |
| 2026-02-09 12:00 |
17:05:56.00 |
-35:51:48.9 |
HIP 83733 |
10.61 |
| 2026-02-10 00:00 |
17:06:01.14 |
-35:52:12.3 |
HIP 83733 |
9.53 |
| 2026-02-10 12:00 |
17:06:06.22 |
-35:52:35.7 |
HIP 83733 |
8.47 |
| 2026-02-11 00:00 |
17:06:11.22 |
-35:52:59.2 |
HIP 83733 |
7.43 |
| 2026-02-11 12:00 |
17:06:16.15 |
-35:53:22.7 |
HIP 83733 |
6.43 |
| 2026-02-12 00:00 |
17:06:21.01 |
-35:53:46.2 |
HIP 83733 |
5.47 |
| 2026-02-12 12:00 |
17:06:25.80 |
-35:54:09.7 |
HIP 83733 |
4.57 |
| 2026-02-13 00:00 |
17:06:30.52 |
-35:54:33.2 |
HIP 83733 |
3.75 |
| 2026-02-13 12:00 |
17:06:35.17 |
-35:54:56.8 |
HIP 83733 |
3.09 |
| 2026-02-14 00:00 |
17:06:39.74 |
-35:55:20.3 |
HIP 83733 |
2.66 |
| 2026-02-14 12:00 |
17:06:44.24 |
-35:55:43.9 |
HIP 83733 |
2.59 |
| 2026-02-15 00:00 |
17:06:48.66 |
-35:56:07.5 |
HIP 83733 |
2.88 |
| 2026-02-15 12:00 |
17:06:53.02 |
-35:56:31.0 |
HIP 83733 |
3.43 |
| 2026-02-16 00:00 |
17:06:57.29 |
-35:56:54.6 |
HIP 83733 |
4.12 |
| 2026-02-16 12:00 |
17:07:01.50 |
-35:57:18.2 |
HIP 83733 |
4.90 |
| 2026-02-17 00:00 |
17:07:05.62 |
-35:57:41.8 |
HIP 83779 |
5.32 |
| 2026-02-17 12:00 |
17:07:09.68 |
-35:58:05.4 |
HIP 83779 |
5.19 |
| 2026-02-18 00:00 |
17:07:13.65 |
-35:58:29.0 |
HIP 83779 |
5.21 |
| 2026-02-18 12:00 |
17:07:17.55 |
-35:58:52.5 |
HIP 83779 |
5.39 |
| 2026-02-19 00:00 |
17:07:21.38 |
-35:59:16.1 |
HIP 83779 |
5.71 |
| 2026-02-19 12:00 |
17:07:25.13 |
-35:59:39.7 |
HIP 83779 |
6.12 |
| 2026-02-20 00:00 |
17:07:28.80 |
-36:00:03.2 |
HIP 83779 |
6.62 |
| 2026-02-20 12:00 |
17:07:32.39 |
-36:00:26.8 |
HIP 83779 |
7.18 |
| 2026-02-21 00:00 |
17:07:35.91 |
-36:00:50.3 |
HIP 83779 |
7.78 |
| 2026-02-21 12:00 |
17:07:39.35 |
-36:01:13.8 |
HIP 83779 |
8.41 |
| 2026-02-22 00:00 |
17:07:42.71 |
-36:01:37.3 |
HIP 83779 |
9.06 |
| 2026-02-22 12:00 |
17:07:45.99 |
-36:02:00.8 |
HIP 83779 |
9.72 |
| 2026-02-23 00:00 |
17:07:49.20 |
-36:02:24.3 |
HIP 83779 |
10.39 |
| 2026-02-23 12:00 |
17:07:52.32 |
-36:02:47.7 |
HIP 83779 |
11.06 |
| 2026-02-24 00:00 |
17:07:55.37 |
-36:03:11.2 |
HIP 83779 |
11.73 |