| Parameter |
Value |
| Designation |
C/2020 K5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2021-06-05T14:17:47.019840Z |
| Orbit solution date (soln_date, UTC) |
2022-07-19T01:12:39Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
15.100 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-05-25T12:10:42.297600Z |
| Discovery magnitude (MPC) |
20.79 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-08-26.0000000 |
| e |
1.00134161 |
| q (au) |
1.535413 |
| a (au) |
-1144.452658 |
| i (deg) |
67.161983 |
| Ω (om, deg) |
86.163539 |
| ω (w, deg) |
249.602889 |
| M (ma, deg) |
-0.007219 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.860 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.860 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.998 |
| 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 |
07:22:25.22 |
+52:04:46.4 |
HIP 35824 |
14.29 |
| 2026-09-20 12:00 |
07:22:30.11 |
+52:05:43.8 |
HIP 35824 |
13.08 |
| 2026-09-21 00:00 |
07:22:34.92 |
+52:06:41.5 |
HIP 35824 |
11.88 |
| 2026-09-21 12:00 |
07:22:39.63 |
+52:07:39.5 |
HIP 35824 |
10.67 |
| 2026-09-22 00:00 |
07:22:44.25 |
+52:08:37.8 |
HIP 35824 |
9.47 |
| 2026-09-22 12:00 |
07:22:48.79 |
+52:09:36.3 |
HIP 35824 |
8.28 |
| 2026-09-23 00:00 |
07:22:53.23 |
+52:10:35.2 |
HIP 35824 |
7.09 |
| 2026-09-23 12:00 |
07:22:57.59 |
+52:11:34.4 |
HIP 35824 |
5.90 |
| 2026-09-24 00:00 |
07:23:01.85 |
+52:12:33.8 |
HIP 35824 |
4.72 |
| 2026-09-24 12:00 |
07:23:06.02 |
+52:13:33.5 |
HIP 35824 |
3.54 |
| 2026-09-25 00:00 |
07:23:10.10 |
+52:14:33.6 |
HIP 35824 |
2.38 |
| 2026-09-25 12:00 |
07:23:14.08 |
+52:15:33.8 |
HIP 35824 |
1.22 |
| 2026-09-26 00:00 |
07:23:17.98 |
+52:16:34.4 |
HIP 35824 |
0.33 |
| 2026-09-26 12:00 |
07:23:21.78 |
+52:17:35.2 |
HIP 35824 |
1.20 |
| 2026-09-27 00:00 |
07:23:25.49 |
+52:18:36.3 |
HIP 35824 |
2.34 |
| 2026-09-27 12:00 |
07:23:29.10 |
+52:19:37.7 |
HIP 35824 |
3.50 |
| 2026-09-28 00:00 |
07:23:32.62 |
+52:20:39.4 |
HIP 35824 |
4.65 |
| 2026-09-28 12:00 |
07:23:36.04 |
+52:21:41.3 |
HIP 35824 |
5.80 |
| 2026-09-29 00:00 |
07:23:39.37 |
+52:22:43.4 |
HIP 35824 |
6.95 |
| 2026-09-29 12:00 |
07:23:42.60 |
+52:23:45.8 |
HIP 35824 |
8.10 |
| 2026-09-30 00:00 |
07:23:45.74 |
+52:24:48.5 |
HIP 35824 |
9.24 |
| 2026-09-30 12:00 |
07:23:48.78 |
+52:25:51.5 |
HIP 35977 |
9.73 |
| 2026-10-01 00:00 |
07:23:51.72 |
+52:26:54.6 |
HIP 35977 |
9.56 |
| 2026-10-01 12:00 |
07:23:54.57 |
+52:27:58.1 |
HIP 35977 |
9.54 |
| 2026-10-02 00:00 |
07:23:57.32 |
+52:29:01.7 |
HIP 35977 |
9.66 |
| 2026-10-02 12:00 |
07:23:59.97 |
+52:30:05.7 |
HIP 35977 |
9.94 |
| 2026-10-03 00:00 |
07:24:02.52 |
+52:31:09.8 |
HIP 35977 |
10.34 |
| 2026-10-03 12:00 |
07:24:04.97 |
+52:32:14.2 |
HIP 35977 |
10.86 |
| 2026-10-04 00:00 |
07:24:07.32 |
+52:33:18.8 |
HIP 35977 |
11.49 |
| 2026-10-04 12:00 |
07:24:09.58 |
+52:34:23.7 |
HIP 35977 |
12.20 |
| 2026-10-05 00:00 |
07:24:11.73 |
+52:35:28.8 |
HIP 35977 |
12.98 |
| 2026-10-05 12:00 |
07:24:13.78 |
+52:36:34.1 |
HIP 35977 |
13.82 |
| 2026-10-06 00:00 |
07:24:15.73 |
+52:37:39.6 |
HIP 35977 |
14.71 |
| 2026-10-06 12:00 |
07:24:17.57 |
+52:38:45.4 |
HIP 35977 |
15.63 |
| 2026-10-07 00:00 |
07:24:19.32 |
+52:39:51.3 |
HIP 35977 |
16.60 |
| 2026-10-07 12:00 |
07:24:20.96 |
+52:40:57.5 |
HIP 35977 |
17.59 |
| 2026-10-08 00:00 |
07:24:22.50 |
+52:42:03.9 |
HIP 35766 |
17.82 |
| 2026-10-08 12:00 |
07:24:23.94 |
+52:43:10.4 |
HIP 35766 |
17.53 |
| 2026-10-09 00:00 |
07:24:25.27 |
+52:44:17.2 |
HIP 35766 |
17.29 |
| 2026-10-09 12:00 |
07:24:26.50 |
+52:45:24.2 |
HIP 35766 |
17.11 |
| 2026-10-10 00:00 |
07:24:27.62 |
+52:46:31.3 |
HIP 35766 |
16.99 |
| 2026-10-10 12:00 |
07:24:28.64 |
+52:47:38.7 |
HIP 35766 |
16.92 |
| 2026-10-11 00:00 |
07:24:29.56 |
+52:48:46.2 |
HIP 35766 |
16.92 |