| 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
$$
M_a = (10.865 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.865 |
| n |
2.000 |
| gf |
0.996 |
| gb |
-1.000 |
| k |
1.000 |
| 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) |
| 2026-06-01 00:00 |
01:02:32.83 |
+39:29:28.0 |
HIP 4863 |
0.95 |
| 2026-06-01 12:00 |
01:02:40.05 |
+39:30:44.7 |
HIP 4863 |
2.71 |
| 2026-06-02 00:00 |
01:02:47.22 |
+39:32:01.5 |
HIP 4863 |
4.57 |
| 2026-06-02 12:00 |
01:02:54.34 |
+39:33:18.3 |
HIP 4863 |
6.44 |
| 2026-06-03 00:00 |
01:03:01.40 |
+39:34:35.2 |
HIP 4853 |
7.20 |
| 2026-06-03 12:00 |
01:03:08.41 |
+39:35:52.2 |
HIP 4853 |
8.07 |
| 2026-06-04 00:00 |
01:03:15.36 |
+39:37:09.1 |
HIP 4853 |
9.23 |
| 2026-06-04 12:00 |
01:03:22.26 |
+39:38:26.1 |
HIP 4853 |
10.58 |
| 2026-06-05 00:00 |
01:03:29.11 |
+39:39:43.2 |
HIP 4853 |
12.04 |
| 2026-06-05 12:00 |
01:03:35.90 |
+39:41:00.3 |
HIP 4853 |
13.59 |
| 2026-06-06 00:00 |
01:03:42.64 |
+39:42:17.4 |
HIP 4853 |
15.19 |
| 2026-06-06 12:00 |
01:03:49.31 |
+39:43:34.5 |
HIP 4853 |
16.83 |
| 2026-06-07 00:00 |
01:03:55.94 |
+39:44:51.6 |
HIP 5045 |
16.54 |
| 2026-06-07 12:00 |
01:04:02.50 |
+39:46:08.8 |
HIP 5045 |
14.83 |
| 2026-06-08 00:00 |
01:04:09.01 |
+39:47:26.0 |
HIP 5045 |
13.13 |
| 2026-06-08 12:00 |
01:04:15.46 |
+39:48:43.1 |
HIP 5045 |
11.48 |
| 2026-06-09 00:00 |
01:04:21.86 |
+39:50:00.3 |
HIP 5045 |
9.87 |
| 2026-06-09 12:00 |
01:04:28.19 |
+39:51:17.5 |
HIP 5045 |
8.33 |
| 2026-06-10 00:00 |
01:04:34.47 |
+39:52:34.7 |
HIP 5045 |
6.90 |
| 2026-06-10 12:00 |
01:04:40.68 |
+39:53:51.9 |
HIP 5045 |
5.67 |
| 2026-06-11 00:00 |
01:04:46.84 |
+39:55:09.0 |
HIP 5045 |
4.76 |
| 2026-06-11 12:00 |
01:04:52.94 |
+39:56:26.2 |
HIP 5045 |
4.39 |
| 2026-06-12 00:00 |
01:04:58.98 |
+39:57:43.3 |
HIP 5088 |
4.18 |
| 2026-06-12 12:00 |
01:05:04.95 |
+39:59:00.4 |
HIP 5088 |
2.48 |
| 2026-06-13 00:00 |
01:05:10.87 |
+40:00:17.5 |
HIP 5088 |
0.86 |
| 2026-06-13 12:00 |
01:05:16.73 |
+40:01:34.5 |
HIP 5088 |
1.07 |
| 2026-06-14 00:00 |
01:05:22.52 |
+40:02:51.6 |
HIP 5088 |
2.71 |
| 2026-06-14 12:00 |
01:05:28.25 |
+40:04:08.5 |
HIP 5088 |
4.38 |
| 2026-06-15 00:00 |
01:05:33.92 |
+40:05:25.5 |
HIP 5088 |
6.05 |
| 2026-06-15 12:00 |
01:05:39.52 |
+40:06:42.4 |
HIP 5088 |
7.72 |
| 2026-06-16 00:00 |
01:05:45.07 |
+40:07:59.2 |
HIP 5088 |
9.38 |
| 2026-06-16 12:00 |
01:05:50.55 |
+40:09:16.0 |
HIP 5088 |
11.03 |
| 2026-06-17 00:00 |
01:05:55.96 |
+40:10:32.7 |
HIP 5088 |
12.67 |
| 2026-06-17 12:00 |
01:06:01.31 |
+40:11:49.4 |
HIP 5088 |
14.30 |
| 2026-06-18 00:00 |
01:06:06.60 |
+40:13:05.9 |
HIP 5088 |
15.93 |
| 2026-06-18 12:00 |
01:06:11.82 |
+40:14:22.4 |
HIP 5088 |
17.54 |
| 2026-06-19 00:00 |
01:06:16.98 |
+40:15:38.9 |
HIP 5088 |
19.15 |
| 2026-06-19 12:00 |
01:06:22.07 |
+40:16:55.2 |
HIP 5088 |
20.75 |
| 2026-06-20 00:00 |
01:06:27.10 |
+40:18:11.5 |
HIP 5088 |
22.34 |
| 2026-06-20 12:00 |
01:06:32.06 |
+40:19:27.7 |
HIP 5088 |
23.92 |
| 2026-06-21 00:00 |
01:06:36.96 |
+40:20:43.8 |
HIP 5088 |
25.49 |
| 2026-06-21 12:00 |
01:06:41.79 |
+40:21:59.8 |
HIP 5088 |
27.05 |
| 2026-06-22 00:00 |
01:06:46.55 |
+40:23:15.7 |
HIP 5404 |
27.41 |