143P/Kowal-Mrkos
| Parameter |
Value |
| Designation |
143P/Kowal-Mrkos |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2018-05-07T17:47:33.486720Z |
| Orbit solution date (soln_date, UTC) |
2026-01-13T08:12:54Z |
| Obs used |
1309 |
| NEO |
- |
| M1 |
14.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-03-13.0000000 |
| e |
0.40949067 |
| q (au) |
2.536773 |
| a (au) |
4.295907 |
| i (deg) |
4.692088 |
| Ω (om, deg) |
245.306851 |
| ω (w, deg) |
320.791025 |
| M (ma, deg) |
232.509819 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.512 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.512 |
| n |
2.000 |
| gf |
0.842 |
| gb |
-0.810 |
| k |
0.994 |
| 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) |
| 2026-02-03 00:00 |
07:46:55.84 |
+14:44:38.3 |
HIP 37836 |
23.71 |
| 2026-02-03 12:00 |
07:46:36.60 |
+14:45:26.1 |
HIP 37836 |
19.82 |
| 2026-02-04 00:00 |
07:46:17.51 |
+14:46:14.0 |
HIP 37836 |
16.40 |
| 2026-02-04 12:00 |
07:45:58.56 |
+14:47:02.1 |
HIP 37836 |
13.78 |
| 2026-02-05 00:00 |
07:45:39.76 |
+14:47:50.3 |
HIP 37836 |
12.41 |
| 2026-02-05 12:00 |
07:45:21.12 |
+14:48:38.7 |
HIP 37836 |
12.69 |
| 2026-02-06 00:00 |
07:45:02.64 |
+14:49:27.1 |
HIP 37836 |
14.47 |
| 2026-02-06 12:00 |
07:44:44.33 |
+14:50:15.6 |
HIP 37836 |
17.28 |
| 2026-02-07 00:00 |
07:44:26.19 |
+14:51:04.2 |
HIP 37836 |
20.66 |
| 2026-02-07 12:00 |
07:44:08.22 |
+14:51:52.9 |
HIP 37585 |
23.36 |
| 2026-02-08 00:00 |
07:43:50.43 |
+14:52:41.6 |
HIP 37585 |
19.35 |
| 2026-02-08 12:00 |
07:43:32.82 |
+14:53:30.4 |
HIP 37585 |
15.57 |
| 2026-02-09 00:00 |
07:43:15.40 |
+14:54:19.1 |
HIP 37585 |
12.18 |
| 2026-02-09 12:00 |
07:42:58.18 |
+14:55:07.9 |
HIP 37585 |
9.56 |
| 2026-02-10 00:00 |
07:42:41.15 |
+14:55:56.8 |
HIP 37585 |
8.38 |
| 2026-02-10 12:00 |
07:42:24.32 |
+14:56:45.6 |
HIP 37585 |
9.14 |
| 2026-02-11 00:00 |
07:42:07.69 |
+14:57:34.4 |
HIP 37585 |
11.42 |
| 2026-02-11 12:00 |
07:41:51.27 |
+14:58:23.1 |
HIP 37585 |
14.48 |
| 2026-02-12 00:00 |
07:41:35.07 |
+14:59:11.8 |
HIP 37585 |
17.88 |
| 2026-02-12 12:00 |
07:41:19.08 |
+15:00:00.5 |
HIP 37585 |
21.44 |
| 2026-02-13 00:00 |
07:41:03.31 |
+15:00:49.1 |
HIP 37585 |
25.05 |
| 2026-02-13 12:00 |
07:40:47.77 |
+15:01:37.7 |
HIP 37585 |
28.69 |
| 2026-02-14 00:00 |
07:40:32.45 |
+15:02:26.1 |
HIP 37585 |
32.32 |
| 2026-02-14 12:00 |
07:40:17.37 |
+15:03:14.5 |
HIP 37585 |
35.92 |
| 2026-02-15 00:00 |
07:40:02.52 |
+15:04:02.7 |
HIP 37282 |
37.66 |
| 2026-02-15 12:00 |
07:39:47.91 |
+15:04:50.8 |
HIP 37282 |
37.64 |
| 2026-02-16 00:00 |
07:39:33.54 |
+15:05:38.8 |
HIP 37282 |
37.98 |
| 2026-02-16 12:00 |
07:39:19.42 |
+15:06:26.6 |
HIP 37066 |
35.85 |
| 2026-02-17 00:00 |
07:39:05.55 |
+15:07:14.3 |
HIP 37066 |
33.08 |
| 2026-02-17 12:00 |
07:38:51.94 |
+15:08:01.8 |
HIP 37066 |
30.50 |
| 2026-02-18 00:00 |
07:38:38.58 |
+15:08:49.2 |
HIP 37066 |
28.14 |
| 2026-02-18 12:00 |
07:38:25.47 |
+15:09:36.3 |
HIP 37066 |
26.04 |
| 2026-02-19 00:00 |
07:38:12.63 |
+15:10:23.3 |
HIP 37066 |
24.24 |
| 2026-02-19 12:00 |
07:38:00.06 |
+15:11:10.0 |
HIP 37066 |
22.79 |
| 2026-02-20 00:00 |
07:37:47.75 |
+15:11:56.5 |
HIP 37066 |
21.73 |
| 2026-02-20 12:00 |
07:37:35.72 |
+15:12:42.8 |
HIP 37066 |
21.08 |
| 2026-02-21 00:00 |
07:37:23.96 |
+15:13:28.8 |
HIP 37066 |
20.87 |
| 2026-02-21 12:00 |
07:37:12.47 |
+15:14:14.6 |
HIP 37066 |
21.07 |
| 2026-02-22 00:00 |
07:37:01.27 |
+15:15:00.1 |
HIP 37066 |
21.66 |
| 2026-02-22 12:00 |
07:36:50.34 |
+15:15:45.4 |
HIP 37066 |
22.56 |
| 2026-02-23 00:00 |
07:36:39.70 |
+15:16:30.3 |
HIP 37066 |
23.74 |
| 2026-02-23 12:00 |
07:36:29.34 |
+15:17:15.0 |
HIP 37066 |
25.11 |
| 2026-02-24 00:00 |
07:36:19.27 |
+15:17:59.4 |
HIP 37066 |
26.64 |