C/2020 F6 (PANSTARRS)
| 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 |
0.999 |
| gb |
-0.710 |
| k |
0.800 |
| δ90 |
9.999 |
| 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 |
06:35:21.32 |
+28:38:34.1 |
HIP 31444 |
12.07 |
| 2026-02-03 12:00 |
06:35:12.19 |
+28:38:33.8 |
HIP 31444 |
12.02 |
| 2026-02-04 00:00 |
06:35:03.12 |
+28:38:33.2 |
HIP 31444 |
12.30 |
| 2026-02-04 12:00 |
06:34:54.11 |
+28:38:32.5 |
HIP 31444 |
12.87 |
| 2026-02-05 00:00 |
06:34:45.15 |
+28:38:31.7 |
HIP 31444 |
13.70 |
| 2026-02-05 12:00 |
06:34:36.26 |
+28:38:30.7 |
HIP 31444 |
14.74 |
| 2026-02-06 00:00 |
06:34:27.42 |
+28:38:29.5 |
HIP 31444 |
15.94 |
| 2026-02-06 12:00 |
06:34:18.65 |
+28:38:28.2 |
HIP 31444 |
17.26 |
| 2026-02-07 00:00 |
06:34:09.94 |
+28:38:26.7 |
HIP 31444 |
18.68 |
| 2026-02-07 12:00 |
06:34:01.29 |
+28:38:25.1 |
HIP 31444 |
20.17 |
| 2026-02-08 00:00 |
06:33:52.70 |
+28:38:23.3 |
HIP 31444 |
21.70 |
| 2026-02-08 12:00 |
06:33:44.18 |
+28:38:21.4 |
HIP 31219 |
21.20 |
| 2026-02-09 00:00 |
06:33:35.72 |
+28:38:19.3 |
HIP 31219 |
20.29 |
| 2026-02-09 12:00 |
06:33:27.32 |
+28:38:17.1 |
HIP 31219 |
19.53 |
| 2026-02-10 00:00 |
06:33:18.99 |
+28:38:14.8 |
HIP 31219 |
18.92 |
| 2026-02-10 12:00 |
06:33:10.72 |
+28:38:12.3 |
HIP 31219 |
18.46 |
| 2026-02-11 00:00 |
06:33:02.52 |
+28:38:09.6 |
HIP 31219 |
18.18 |
| 2026-02-11 12:00 |
06:32:54.38 |
+28:38:06.8 |
HIP 31219 |
18.08 |
| 2026-02-12 00:00 |
06:32:46.32 |
+28:38:03.9 |
HIP 31219 |
18.14 |
| 2026-02-12 12:00 |
06:32:38.32 |
+28:38:00.8 |
HIP 31219 |
18.37 |
| 2026-02-13 00:00 |
06:32:30.38 |
+28:37:57.6 |
HIP 31219 |
18.76 |
| 2026-02-13 12:00 |
06:32:22.52 |
+28:37:54.3 |
HIP 31219 |
19.29 |
| 2026-02-14 00:00 |
06:32:14.72 |
+28:37:50.8 |
HIP 31219 |
19.94 |
| 2026-02-14 12:00 |
06:32:07.00 |
+28:37:47.2 |
HIP 31219 |
20.71 |
| 2026-02-15 00:00 |
06:31:59.34 |
+28:37:43.5 |
HIP 31219 |
21.58 |
| 2026-02-15 12:00 |
06:31:51.75 |
+28:37:39.6 |
HIP 31117 |
21.60 |
| 2026-02-16 00:00 |
06:31:44.24 |
+28:37:35.6 |
HIP 31117 |
21.63 |
| 2026-02-16 12:00 |
06:31:36.79 |
+28:37:31.4 |
HIP 31117 |
21.79 |
| 2026-02-17 00:00 |
06:31:29.42 |
+28:37:27.2 |
HIP 31117 |
22.06 |
| 2026-02-17 12:00 |
06:31:22.12 |
+28:37:22.8 |
HIP 31117 |
22.45 |
| 2026-02-18 00:00 |
06:31:14.89 |
+28:37:18.3 |
HIP 31117 |
22.94 |
| 2026-02-18 12:00 |
06:31:07.73 |
+28:37:13.6 |
HIP 30943 |
21.61 |
| 2026-02-19 00:00 |
06:31:00.65 |
+28:37:08.9 |
HIP 30943 |
20.27 |
| 2026-02-19 12:00 |
06:30:53.64 |
+28:37:04.0 |
HIP 30943 |
18.97 |
| 2026-02-20 00:00 |
06:30:46.70 |
+28:36:59.0 |
HIP 30943 |
17.73 |
| 2026-02-20 12:00 |
06:30:39.84 |
+28:36:53.8 |
HIP 30943 |
16.55 |
| 2026-02-21 00:00 |
06:30:33.06 |
+28:36:48.6 |
HIP 30943 |
15.45 |
| 2026-02-21 12:00 |
06:30:26.34 |
+28:36:43.2 |
HIP 30943 |
14.42 |
| 2026-02-22 00:00 |
06:30:19.71 |
+28:36:37.8 |
HIP 30943 |
13.49 |
| 2026-02-22 12:00 |
06:30:13.14 |
+28:36:32.2 |
HIP 30943 |
12.68 |
| 2026-02-23 00:00 |
06:30:06.66 |
+28:36:26.5 |
HIP 30943 |
11.99 |
| 2026-02-23 12:00 |
06:30:00.25 |
+28:36:20.7 |
HIP 30943 |
11.44 |
| 2026-02-24 00:00 |
06:29:53.91 |
+28:36:14.8 |
HIP 30943 |
11.06 |