384P/Kowalski
| Parameter |
Value |
| Designation |
384P/Kowalski |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-10-11T09:33:16.280640Z |
| Orbit solution date (soln_date, UTC) |
2025-02-13T09:13:14Z |
| Obs used |
740 |
| NEO |
Yes |
| M1 |
20.000 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2019-04-27.0000000 |
| e |
0.61538477 |
| q (au) |
1.116494 |
| a (au) |
2.902887 |
| i (deg) |
7.280738 |
| Ω (om, deg) |
354.239718 |
| ω (w, deg) |
37.622709 |
| M (ma, deg) |
326.641274 |
Magnitude
Scatter + Global Linear
$$
M_a = (19.277 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
19.277 |
| n |
6.000 |
| gf |
0.800 |
| gb |
-0.716 |
| k |
0.856 |
| δ90 |
2.133 |
| 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 |
13:03:40.92 |
-08:30:46.0 |
HIP 63818 |
16.70 |
| 2026-02-03 12:00 |
13:03:34.98 |
-08:30:45.4 |
HIP 63818 |
18.15 |
| 2026-02-04 00:00 |
13:03:28.76 |
-08:30:43.1 |
HIP 63818 |
19.66 |
| 2026-02-04 12:00 |
13:03:22.29 |
-08:30:39.2 |
HIP 63818 |
21.25 |
| 2026-02-05 00:00 |
13:03:15.54 |
-08:30:33.8 |
HIP 63818 |
22.91 |
| 2026-02-05 12:00 |
13:03:08.53 |
-08:30:26.7 |
HIP 63818 |
24.64 |
| 2026-02-06 00:00 |
13:03:01.26 |
-08:30:18.1 |
HIP 63548 |
25.39 |
| 2026-02-06 12:00 |
13:02:53.72 |
-08:30:07.8 |
HIP 63548 |
23.53 |
| 2026-02-07 00:00 |
13:02:45.91 |
-08:29:55.9 |
HIP 63548 |
21.59 |
| 2026-02-07 12:00 |
13:02:37.84 |
-08:29:42.5 |
HIP 63548 |
19.58 |
| 2026-02-08 00:00 |
13:02:29.50 |
-08:29:27.4 |
HIP 63548 |
17.51 |
| 2026-02-08 12:00 |
13:02:20.90 |
-08:29:10.7 |
HIP 63548 |
15.37 |
| 2026-02-09 00:00 |
13:02:12.03 |
-08:28:52.4 |
HIP 63548 |
13.16 |
| 2026-02-09 12:00 |
13:02:02.90 |
-08:28:32.5 |
HIP 63548 |
10.88 |
| 2026-02-10 00:00 |
13:01:53.50 |
-08:28:11.0 |
HIP 63548 |
8.53 |
| 2026-02-10 12:00 |
13:01:43.84 |
-08:27:47.9 |
HIP 63548 |
6.11 |
| 2026-02-11 00:00 |
13:01:33.92 |
-08:27:23.2 |
HIP 63548 |
3.63 |
| 2026-02-11 12:00 |
13:01:23.74 |
-08:26:56.8 |
HIP 63548 |
1.12 |
| 2026-02-12 00:00 |
13:01:13.29 |
-08:26:28.8 |
HIP 63548 |
1.60 |
| 2026-02-12 12:00 |
13:01:02.59 |
-08:25:59.3 |
HIP 63548 |
4.27 |
| 2026-02-13 00:00 |
13:00:51.62 |
-08:25:28.1 |
HIP 63548 |
7.02 |
| 2026-02-13 12:00 |
13:00:40.40 |
-08:24:55.3 |
HIP 63548 |
9.85 |
| 2026-02-14 00:00 |
13:00:28.92 |
-08:24:20.8 |
HIP 63548 |
12.74 |
| 2026-02-14 12:00 |
13:00:17.18 |
-08:23:44.8 |
HIP 63474 |
14.74 |
| 2026-02-15 00:00 |
13:00:05.18 |
-08:23:07.2 |
HIP 63474 |
15.96 |
| 2026-02-15 12:00 |
12:59:52.93 |
-08:22:28.0 |
HIP 63474 |
17.67 |
| 2026-02-16 00:00 |
12:59:40.43 |
-08:21:47.1 |
HIP 63474 |
19.78 |
| 2026-02-16 12:00 |
12:59:27.67 |
-08:21:04.7 |
HIP 63474 |
22.21 |
| 2026-02-17 00:00 |
12:59:14.67 |
-08:20:20.7 |
HIP 63362 |
24.27 |
| 2026-02-17 12:00 |
12:59:01.41 |
-08:19:35.1 |
HIP 63362 |
24.75 |
| 2026-02-18 00:00 |
12:58:47.91 |
-08:18:47.9 |
HIP 63362 |
25.69 |
| 2026-02-18 12:00 |
12:58:34.16 |
-08:17:59.1 |
HIP 63362 |
27.08 |
| 2026-02-19 00:00 |
12:58:20.16 |
-08:17:08.8 |
HIP 63362 |
28.88 |
| 2026-02-19 12:00 |
12:58:05.92 |
-08:16:16.9 |
HIP 63362 |
31.03 |
| 2026-02-20 00:00 |
12:57:51.44 |
-08:15:23.4 |
HIP 63362 |
33.49 |
| 2026-02-20 12:00 |
12:57:36.72 |
-08:14:28.4 |
HIP 63362 |
36.21 |
| 2026-02-21 00:00 |
12:57:21.76 |
-08:13:31.9 |
HIP 63362 |
39.16 |
| 2026-02-21 12:00 |
12:57:06.57 |
-08:12:33.8 |
HIP 63088 |
38.33 |
| 2026-02-22 00:00 |
12:56:51.14 |
-08:11:34.2 |
HIP 63088 |
37.05 |
| 2026-02-22 12:00 |
12:56:35.49 |
-08:10:33.0 |
HIP 63088 |
36.16 |
| 2026-02-23 00:00 |
12:56:19.60 |
-08:09:30.4 |
HIP 63088 |
35.70 |
| 2026-02-23 12:00 |
12:56:03.49 |
-08:08:26.2 |
HIP 63088 |
35.72 |
| 2026-02-24 00:00 |
12:55:47.15 |
-08:07:20.6 |
HIP 63088 |
36.23 |