| Parameter |
Value |
| Designation |
C/2022 JK5 (PANSTARRS) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2023-04-28T20:24:39.856320Z |
| Orbit solution date (soln_date, UTC) |
2024-12-03T17:12:22Z |
| Obs used |
892 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2023-09-05.0000000 |
| e |
0.93785074 |
| q (au) |
2.687022 |
| a (au) |
43.234983 |
| i (deg) |
16.830858 |
| Ω (om, deg) |
59.651258 |
| ω (w, deg) |
247.170105 |
| M (ma, deg) |
0.447759 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.692 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.692 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.768 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
04:05:53.84 |
+22:23:03.3 |
HIP 19075 |
21.11 |
| 2026-05-12 12:00 |
04:06:08.20 |
+22:23:53.1 |
HIP 19075 |
23.29 |
| 2026-05-13 00:00 |
04:06:22.58 |
+22:24:42.9 |
HIP 19075 |
25.74 |
| 2026-05-13 12:00 |
04:06:36.96 |
+22:25:32.6 |
HIP 19163 |
28.16 |
| 2026-05-14 00:00 |
04:06:51.36 |
+22:26:22.3 |
HIP 19163 |
29.26 |
| 2026-05-14 12:00 |
04:07:05.76 |
+22:27:12.0 |
HIP 19299 |
30.38 |
| 2026-05-15 00:00 |
04:07:20.18 |
+22:28:01.6 |
HIP 19299 |
29.53 |
| 2026-05-15 12:00 |
04:07:34.60 |
+22:28:51.1 |
HIP 19299 |
29.06 |
| 2026-05-16 00:00 |
04:07:49.03 |
+22:29:40.7 |
HIP 19299 |
29.00 |
| 2026-05-16 12:00 |
04:08:03.46 |
+22:30:30.2 |
HIP 19299 |
29.34 |
| 2026-05-17 00:00 |
04:08:17.90 |
+22:31:19.6 |
HIP 19299 |
30.06 |
| 2026-05-17 12:00 |
04:08:32.35 |
+22:32:09.0 |
HIP 19299 |
31.16 |
| 2026-05-18 00:00 |
04:08:46.80 |
+22:32:58.4 |
HIP 19484 |
28.01 |
| 2026-05-18 12:00 |
04:09:01.25 |
+22:33:47.7 |
HIP 19484 |
24.91 |
| 2026-05-19 00:00 |
04:09:15.71 |
+22:34:37.0 |
HIP 19484 |
21.90 |
| 2026-05-19 12:00 |
04:09:30.17 |
+22:35:26.2 |
HIP 19484 |
19.04 |
| 2026-05-20 00:00 |
04:09:44.64 |
+22:36:15.3 |
HIP 19484 |
16.39 |
| 2026-05-20 12:00 |
04:09:59.10 |
+22:37:04.4 |
HIP 19484 |
14.10 |
| 2026-05-21 00:00 |
04:10:13.57 |
+22:37:53.4 |
HIP 19484 |
12.35 |
| 2026-05-21 12:00 |
04:10:28.03 |
+22:38:42.4 |
HIP 19484 |
11.39 |
| 2026-05-22 00:00 |
04:10:42.49 |
+22:39:31.3 |
HIP 19484 |
11.42 |
| 2026-05-22 12:00 |
04:10:56.96 |
+22:40:20.2 |
HIP 19484 |
12.45 |
| 2026-05-23 00:00 |
04:11:11.42 |
+22:41:09.0 |
HIP 19484 |
14.24 |
| 2026-05-23 12:00 |
04:11:25.88 |
+22:41:57.7 |
HIP 19484 |
16.57 |
| 2026-05-24 00:00 |
04:11:40.34 |
+22:42:46.4 |
HIP 19484 |
19.22 |
| 2026-05-24 12:00 |
04:11:54.79 |
+22:43:35.0 |
HIP 19484 |
22.09 |
| 2026-05-25 00:00 |
04:12:09.24 |
+22:44:23.6 |
HIP 19702 |
19.88 |
| 2026-05-25 12:00 |
04:12:23.68 |
+22:45:12.0 |
HIP 19702 |
16.92 |
| 2026-05-26 00:00 |
04:12:38.12 |
+22:46:00.4 |
HIP 19702 |
14.18 |
| 2026-05-26 12:00 |
04:12:52.56 |
+22:46:48.8 |
HIP 19702 |
11.80 |
| 2026-05-27 00:00 |
04:13:06.98 |
+22:47:37.0 |
HIP 19702 |
10.04 |
| 2026-05-27 12:00 |
04:13:21.41 |
+22:48:25.2 |
HIP 19702 |
9.27 |
| 2026-05-28 00:00 |
04:13:35.82 |
+22:49:13.3 |
HIP 19745 |
8.61 |
| 2026-05-28 12:00 |
04:13:50.23 |
+22:50:01.4 |
HIP 19745 |
7.81 |
| 2026-05-29 00:00 |
04:14:04.63 |
+22:50:49.4 |
HIP 19745 |
8.44 |
| 2026-05-29 12:00 |
04:14:19.02 |
+22:51:37.3 |
HIP 19745 |
10.23 |
| 2026-05-30 00:00 |
04:14:33.40 |
+22:52:25.1 |
HIP 19745 |
12.70 |
| 2026-05-30 12:00 |
04:14:47.77 |
+22:53:12.8 |
HIP 19745 |
15.53 |
| 2026-05-31 00:00 |
04:15:02.13 |
+22:54:00.5 |
HIP 19745 |
18.55 |
| 2026-05-31 12:00 |
04:15:16.48 |
+22:54:48.1 |
HIP 19745 |
21.68 |
| 2026-06-01 00:00 |
04:15:30.82 |
+22:55:35.6 |
HIP 19745 |
24.88 |
| 2026-06-01 12:00 |
04:15:45.14 |
+22:56:23.0 |
HIP 19981 |
24.69 |
| 2026-06-02 00:00 |
04:15:59.46 |
+22:57:10.3 |
HIP 19981 |
22.85 |