| Parameter |
Value |
| Designation |
C/2020 K7 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2019-10-28T18:33:30.147840Z |
| Orbit solution date (soln_date, UTC) |
2023-01-14T00:12:34Z |
| Obs used |
114 |
| NEO |
- |
| M1 |
12.200 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2020-05-30T13:09:12.211200Z |
| Discovery magnitude (MPC) |
20.21 w |
| Discovery observatory (MPC) |
F51 · Pan-STARRS 1, Haleakala |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2020-09-01.0000000 |
| e |
0.94160673 |
| q (au) |
6.383959 |
| a (au) |
109.326969 |
| i (deg) |
32.066780 |
| Ω (om, deg) |
286.109728 |
| ω (w, deg) |
358.125971 |
| M (ma, deg) |
0.265756 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.874 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.874 |
| n |
2.000 |
| gf |
0.953 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.377 |
| 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) |
| 2026-03-26 00:00 |
00:41:08.69 |
+37:08:41.6 |
HIP 3339 |
17.60 |
| 2026-03-26 12:00 |
00:41:19.32 |
+37:09:21.9 |
HIP 3339 |
15.38 |
| 2026-03-27 00:00 |
00:41:29.95 |
+37:10:02.6 |
HIP 3339 |
13.16 |
| 2026-03-27 12:00 |
00:41:40.59 |
+37:10:43.8 |
HIP 3339 |
10.93 |
| 2026-03-28 00:00 |
00:41:51.23 |
+37:11:25.5 |
HIP 3339 |
8.71 |
| 2026-03-28 12:00 |
00:42:01.87 |
+37:12:07.7 |
HIP 3339 |
6.49 |
| 2026-03-29 00:00 |
00:42:12.52 |
+37:12:50.3 |
HIP 3339 |
4.29 |
| 2026-03-29 12:00 |
00:42:23.17 |
+37:13:33.3 |
HIP 3339 |
2.15 |
| 2026-03-30 00:00 |
00:42:33.81 |
+37:14:16.8 |
HIP 3339 |
0.93 |
| 2026-03-30 12:00 |
00:42:44.46 |
+37:15:00.7 |
HIP 3339 |
2.68 |
| 2026-03-31 00:00 |
00:42:55.11 |
+37:15:45.1 |
HIP 3339 |
4.86 |
| 2026-03-31 12:00 |
00:43:05.76 |
+37:16:30.0 |
HIP 3339 |
7.08 |
| 2026-04-01 00:00 |
00:43:16.41 |
+37:17:15.2 |
HIP 3339 |
9.32 |
| 2026-04-01 12:00 |
00:43:27.05 |
+37:18:00.9 |
HIP 3339 |
11.56 |
| 2026-04-02 00:00 |
00:43:37.70 |
+37:18:47.1 |
HIP 3339 |
13.81 |
| 2026-04-02 12:00 |
00:43:48.34 |
+37:19:33.6 |
HIP 3339 |
16.06 |
| 2026-04-03 00:00 |
00:43:58.98 |
+37:20:20.6 |
HIP 3539 |
14.43 |
| 2026-04-03 12:00 |
00:44:09.62 |
+37:21:08.1 |
HIP 3539 |
12.21 |
| 2026-04-04 00:00 |
00:44:20.25 |
+37:21:55.9 |
HIP 3539 |
10.02 |
| 2026-04-04 12:00 |
00:44:30.88 |
+37:22:44.2 |
HIP 3539 |
7.85 |
| 2026-04-05 00:00 |
00:44:41.51 |
+37:23:32.9 |
HIP 3539 |
5.77 |
| 2026-04-05 12:00 |
00:44:52.13 |
+37:24:22.0 |
HIP 3539 |
3.89 |
| 2026-04-06 00:00 |
00:45:02.75 |
+37:25:11.5 |
HIP 3539 |
2.69 |
| 2026-04-06 12:00 |
00:45:13.36 |
+37:26:01.4 |
HIP 3539 |
3.11 |
| 2026-04-07 00:00 |
00:45:23.97 |
+37:26:51.8 |
HIP 3539 |
4.74 |
| 2026-04-07 12:00 |
00:45:34.57 |
+37:27:42.5 |
HIP 3539 |
6.75 |
| 2026-04-08 00:00 |
00:45:45.16 |
+37:28:33.7 |
HIP 3539 |
8.88 |
| 2026-04-08 12:00 |
00:45:55.75 |
+37:29:25.3 |
HIP 3539 |
11.08 |
| 2026-04-09 00:00 |
00:46:06.32 |
+37:30:17.2 |
HIP 3539 |
13.30 |
| 2026-04-09 12:00 |
00:46:16.89 |
+37:31:09.6 |
HIP 3539 |
15.53 |
| 2026-04-10 00:00 |
00:46:27.46 |
+37:32:02.3 |
HIP 3714 |
15.70 |
| 2026-04-10 12:00 |
00:46:38.01 |
+37:32:55.5 |
HIP 3714 |
13.43 |
| 2026-04-11 00:00 |
00:46:48.55 |
+37:33:49.0 |
HIP 3714 |
11.16 |
| 2026-04-11 12:00 |
00:46:59.09 |
+37:34:42.9 |
HIP 3714 |
8.89 |
| 2026-04-12 00:00 |
00:47:09.61 |
+37:35:37.2 |
HIP 3714 |
6.62 |
| 2026-04-12 12:00 |
00:47:20.12 |
+37:36:31.9 |
HIP 3714 |
4.35 |
| 2026-04-13 00:00 |
00:47:30.62 |
+37:37:26.9 |
HIP 3714 |
2.10 |
| 2026-04-13 12:00 |
00:47:41.11 |
+37:38:22.4 |
HIP 3714 |
0.51 |
| 2026-04-14 00:00 |
00:47:51.59 |
+37:39:18.2 |
HIP 3714 |
2.54 |
| 2026-04-14 12:00 |
00:48:02.05 |
+37:40:14.4 |
HIP 3714 |
4.79 |
| 2026-04-15 00:00 |
00:48:12.51 |
+37:41:10.9 |
HIP 3714 |
7.06 |
| 2026-04-15 12:00 |
00:48:22.94 |
+37:42:07.8 |
HIP 3714 |
9.33 |
| 2026-04-16 00:00 |
00:48:33.37 |
+37:43:05.1 |
HIP 3714 |
11.60 |