| Parameter |
Value |
| Designation |
143P/Kowal-Mrkos |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-07T10:23:54.191040Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:36Z |
| Obs used |
1438 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-01-10.0000000 |
| e |
0.40985335 |
| q (au) |
2.534494 |
| a (au) |
4.294684 |
| i (deg) |
4.694018 |
| Ω (om, deg) |
245.304752 |
| ω (w, deg) |
320.824113 |
| M (ma, deg) |
266.043916 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.189 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.189 |
| n |
2.000 |
| gf |
0.925 |
| gb |
-0.856 |
| k |
0.998 |
| δ90 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
07:35:36.97 |
+15:48:36.1 |
HIP 37019 |
20.56 |
| 2026-03-26 12:00 |
07:35:45.77 |
+15:48:48.8 |
HIP 37019 |
19.13 |
| 2026-03-27 00:00 |
07:35:54.86 |
+15:49:00.8 |
HIP 37019 |
17.80 |
| 2026-03-27 12:00 |
07:36:04.26 |
+15:49:12.1 |
HIP 37019 |
16.64 |
| 2026-03-28 00:00 |
07:36:13.95 |
+15:49:22.7 |
HIP 37019 |
15.72 |
| 2026-03-28 12:00 |
07:36:23.93 |
+15:49:32.6 |
HIP 37019 |
15.11 |
| 2026-03-29 00:00 |
07:36:34.22 |
+15:49:41.8 |
HIP 37019 |
14.88 |
| 2026-03-29 12:00 |
07:36:44.79 |
+15:49:50.2 |
HIP 37019 |
15.09 |
| 2026-03-30 00:00 |
07:36:55.66 |
+15:49:57.9 |
HIP 37019 |
15.76 |
| 2026-03-30 12:00 |
07:37:06.81 |
+15:50:04.8 |
HIP 37019 |
16.85 |
| 2026-03-31 00:00 |
07:37:18.26 |
+15:50:11.1 |
HIP 37019 |
18.33 |
| 2026-03-31 12:00 |
07:37:29.99 |
+15:50:16.5 |
HIP 37019 |
20.14 |
| 2026-04-01 00:00 |
07:37:42.01 |
+15:50:21.3 |
HIP 37019 |
22.22 |
| 2026-04-01 12:00 |
07:37:54.32 |
+15:50:25.3 |
HIP 37242 |
21.24 |
| 2026-04-02 00:00 |
07:38:06.90 |
+15:50:28.5 |
HIP 37242 |
19.23 |
| 2026-04-02 12:00 |
07:38:19.77 |
+15:50:31.0 |
HIP 37242 |
17.50 |
| 2026-04-03 00:00 |
07:38:32.92 |
+15:50:32.7 |
HIP 37242 |
16.16 |
| 2026-04-03 12:00 |
07:38:46.35 |
+15:50:33.7 |
HIP 37242 |
15.38 |
| 2026-04-04 00:00 |
07:39:00.06 |
+15:50:33.9 |
HIP 37242 |
15.27 |
| 2026-04-04 12:00 |
07:39:14.05 |
+15:50:33.3 |
HIP 37242 |
15.89 |
| 2026-04-05 00:00 |
07:39:28.31 |
+15:50:31.9 |
HIP 37242 |
17.20 |
| 2026-04-05 12:00 |
07:39:42.85 |
+15:50:29.8 |
HIP 37242 |
19.09 |
| 2026-04-06 00:00 |
07:39:57.65 |
+15:50:26.9 |
HIP 37242 |
21.45 |
| 2026-04-06 12:00 |
07:40:12.73 |
+15:50:23.2 |
HIP 37242 |
24.16 |
| 2026-04-07 00:00 |
07:40:28.08 |
+15:50:18.7 |
HIP 37499 |
24.45 |
| 2026-04-07 12:00 |
07:40:43.70 |
+15:50:13.4 |
HIP 37499 |
21.59 |
| 2026-04-08 00:00 |
07:40:59.59 |
+15:50:07.3 |
HIP 37499 |
19.00 |
| 2026-04-08 12:00 |
07:41:15.74 |
+15:50:00.4 |
HIP 37499 |
16.84 |
| 2026-04-09 00:00 |
07:41:32.16 |
+15:49:52.7 |
HIP 37499 |
15.35 |
| 2026-04-09 12:00 |
07:41:48.84 |
+15:49:44.2 |
HIP 37499 |
14.78 |
| 2026-04-10 00:00 |
07:42:05.79 |
+15:49:34.9 |
HIP 37499 |
15.29 |
| 2026-04-10 12:00 |
07:42:22.99 |
+15:49:24.7 |
HIP 37499 |
16.83 |
| 2026-04-11 00:00 |
07:42:40.46 |
+15:49:13.7 |
HIP 37499 |
19.18 |
| 2026-04-11 12:00 |
07:42:58.18 |
+15:49:01.9 |
HIP 37499 |
22.14 |
| 2026-04-12 00:00 |
07:43:16.16 |
+15:48:49.3 |
HIP 37499 |
25.51 |
| 2026-04-12 12:00 |
07:43:34.39 |
+15:48:35.8 |
HIP 37797 |
21.35 |
| 2026-04-13 00:00 |
07:43:52.88 |
+15:48:21.4 |
HIP 37797 |
17.14 |
| 2026-04-13 12:00 |
07:44:11.63 |
+15:48:06.2 |
HIP 37797 |
13.04 |
| 2026-04-14 00:00 |
07:44:30.62 |
+15:47:50.2 |
HIP 37797 |
9.29 |
| 2026-04-14 12:00 |
07:44:49.86 |
+15:47:33.3 |
HIP 37797 |
6.67 |
| 2026-04-15 00:00 |
07:45:09.36 |
+15:47:15.6 |
HIP 37797 |
6.78 |
| 2026-04-15 12:00 |
07:45:29.10 |
+15:46:56.9 |
HIP 37797 |
9.62 |
| 2026-04-16 00:00 |
07:45:49.08 |
+15:46:37.5 |
HIP 37797 |
13.64 |