| Parameter |
Value |
| Designation |
C/2020 F6 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2020-04-11T13:43:46.001280Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:34:04Z |
| Obs used |
102 |
| NEO |
- |
| M1 |
9.700 |
| K1 |
16.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-05-25.0000000 |
| e |
0.99080432 |
| q (au) |
3.511043 |
| a (au) |
381.814590 |
| i (deg) |
174.581373 |
| Ω (om, deg) |
207.879892 |
| ω (w, deg) |
344.592457 |
| M (ma, deg) |
0.005737 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.117 + 5.220\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.117 |
| n |
5.220 |
| gf |
1.000 |
| gb |
-0.710 |
| 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) |
| 2026-07-29 00:00 |
06:43:44.41 |
+27:54:10.8 |
HIP 32265 |
26.11 |
| 2026-07-29 12:00 |
06:43:49.95 |
+27:54:08.7 |
HIP 32265 |
25.82 |
| 2026-07-30 00:00 |
06:43:55.47 |
+27:54:06.7 |
HIP 32265 |
25.58 |
| 2026-07-30 12:00 |
06:44:00.95 |
+27:54:04.8 |
HIP 32389 |
24.92 |
| 2026-07-31 00:00 |
06:44:06.41 |
+27:54:02.9 |
HIP 32389 |
23.90 |
| 2026-07-31 12:00 |
06:44:11.84 |
+27:54:01.1 |
HIP 32389 |
22.91 |
| 2026-08-01 00:00 |
06:44:17.24 |
+27:53:59.4 |
HIP 32389 |
21.94 |
| 2026-08-01 12:00 |
06:44:22.61 |
+27:53:57.8 |
HIP 32389 |
21.00 |
| 2026-08-02 00:00 |
06:44:27.96 |
+27:53:56.3 |
HIP 32389 |
20.10 |
| 2026-08-02 12:00 |
06:44:33.27 |
+27:53:54.8 |
HIP 32389 |
19.23 |
| 2026-08-03 00:00 |
06:44:38.55 |
+27:53:53.5 |
HIP 32389 |
18.40 |
| 2026-08-03 12:00 |
06:44:43.80 |
+27:53:52.2 |
HIP 32389 |
17.62 |
| 2026-08-04 00:00 |
06:44:49.02 |
+27:53:51.0 |
HIP 32389 |
16.88 |
| 2026-08-04 12:00 |
06:44:54.20 |
+27:53:49.9 |
HIP 32389 |
16.20 |
| 2026-08-05 00:00 |
06:44:59.35 |
+27:53:48.9 |
HIP 32389 |
15.58 |
| 2026-08-05 12:00 |
06:45:04.47 |
+27:53:47.9 |
HIP 32389 |
15.02 |
| 2026-08-06 00:00 |
06:45:09.56 |
+27:53:47.1 |
HIP 32389 |
14.53 |
| 2026-08-06 12:00 |
06:45:14.62 |
+27:53:46.3 |
HIP 32389 |
14.12 |
| 2026-08-07 00:00 |
06:45:19.64 |
+27:53:45.6 |
HIP 32389 |
13.80 |
| 2026-08-07 12:00 |
06:45:24.62 |
+27:53:45.0 |
HIP 32448 |
13.25 |
| 2026-08-08 00:00 |
06:45:29.57 |
+27:53:44.5 |
HIP 32448 |
12.23 |
| 2026-08-08 12:00 |
06:45:34.48 |
+27:53:44.0 |
HIP 32448 |
11.24 |
| 2026-08-09 00:00 |
06:45:39.36 |
+27:53:43.7 |
HIP 32448 |
10.27 |
| 2026-08-09 12:00 |
06:45:44.20 |
+27:53:43.5 |
HIP 32448 |
9.33 |
| 2026-08-10 00:00 |
06:45:49.01 |
+27:53:43.3 |
HIP 32448 |
8.43 |
| 2026-08-10 12:00 |
06:45:53.78 |
+27:53:43.2 |
HIP 32448 |
7.58 |
| 2026-08-11 00:00 |
06:45:58.51 |
+27:53:43.2 |
HIP 32448 |
6.80 |
| 2026-08-11 12:00 |
06:46:03.20 |
+27:53:43.3 |
HIP 32448 |
6.10 |
| 2026-08-12 00:00 |
06:46:07.85 |
+27:53:43.5 |
HIP 32448 |
5.52 |
| 2026-08-12 12:00 |
06:46:12.47 |
+27:53:43.8 |
HIP 32448 |
5.08 |
| 2026-08-13 00:00 |
06:46:17.04 |
+27:53:44.2 |
HIP 32448 |
4.83 |
| 2026-08-13 12:00 |
06:46:21.58 |
+27:53:44.7 |
HIP 32448 |
4.78 |
| 2026-08-14 00:00 |
06:46:26.07 |
+27:53:45.3 |
HIP 32448 |
4.94 |
| 2026-08-14 12:00 |
06:46:30.52 |
+27:53:45.9 |
HIP 32448 |
5.28 |
| 2026-08-15 00:00 |
06:46:34.93 |
+27:53:46.7 |
HIP 32448 |
5.77 |
| 2026-08-15 12:00 |
06:46:39.30 |
+27:53:47.5 |
HIP 32448 |
6.36 |
| 2026-08-16 00:00 |
06:46:43.63 |
+27:53:48.5 |
HIP 32448 |
7.03 |
| 2026-08-16 12:00 |
06:46:47.92 |
+27:53:49.5 |
HIP 32448 |
7.76 |
| 2026-08-17 00:00 |
06:46:52.16 |
+27:53:50.6 |
HIP 32448 |
8.52 |
| 2026-08-17 12:00 |
06:46:56.36 |
+27:53:51.9 |
HIP 32448 |
9.31 |
| 2026-08-18 00:00 |
06:47:00.51 |
+27:53:53.2 |
HIP 32448 |
10.11 |
| 2026-08-18 12:00 |
06:47:04.62 |
+27:53:54.6 |
HIP 32448 |
10.93 |
| 2026-08-19 00:00 |
06:47:08.69 |
+27:53:56.1 |
HIP 32448 |
11.74 |