| Parameter |
Value |
| Designation |
P/2025 W3 (Kresken) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-03-17T01:23:50.372160Z |
| Orbit solution date (soln_date, UTC) |
2026-03-07T14:43:27Z |
| Obs used |
41 |
| NEO |
- |
| M1 |
18.700 |
| K1 |
4.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2025-11-29T03:49:57.043200Z |
| Discovery magnitude (MPC) |
22.10 G |
| Discovery observatory (MPC) |
Z84 · Calar Alto-Schmidt |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2025-12-18.0000000 |
| e |
0.18056761 |
| q (au) |
2.087186 |
| a (au) |
2.547112 |
| i (deg) |
9.744861 |
| Ω (om, deg) |
60.053173 |
| ω (w, deg) |
311.399120 |
| M (ma, deg) |
66.903591 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 3.868\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
3.868 |
| gf |
1.000 |
| gb |
-0.821 |
| 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 |
07:44:54.71 |
+29:40:58.4 |
HIP 37693 |
20.56 |
| 2026-05-12 12:00 |
07:45:39.63 |
+29:38:32.7 |
HIP 38002 |
22.07 |
| 2026-05-13 00:00 |
07:46:24.63 |
+29:36:06.2 |
HIP 38002 |
12.10 |
| 2026-05-13 12:00 |
07:47:09.71 |
+29:33:39.0 |
HIP 38002 |
2.94 |
| 2026-05-14 00:00 |
07:47:54.88 |
+29:31:11.1 |
HIP 38002 |
8.68 |
| 2026-05-14 12:00 |
07:48:40.12 |
+29:28:42.4 |
HIP 38002 |
18.66 |
| 2026-05-15 00:00 |
07:49:25.44 |
+29:26:13.0 |
HIP 38002 |
28.78 |
| 2026-05-15 12:00 |
07:50:10.84 |
+29:23:42.9 |
HIP 38363 |
21.42 |
| 2026-05-16 00:00 |
07:50:56.31 |
+29:21:12.0 |
HIP 38363 |
12.93 |
| 2026-05-16 12:00 |
07:51:41.86 |
+29:18:40.3 |
HIP 38391 |
8.30 |
| 2026-05-17 00:00 |
07:52:27.48 |
+29:16:07.9 |
HIP 38391 |
9.10 |
| 2026-05-17 12:00 |
07:53:13.17 |
+29:13:34.8 |
HIP 38586 |
11.20 |
| 2026-05-18 00:00 |
07:53:58.94 |
+29:11:00.9 |
HIP 38586 |
2.05 |
| 2026-05-18 12:00 |
07:54:44.77 |
+29:08:26.3 |
HIP 38586 |
9.80 |
| 2026-05-19 00:00 |
07:55:30.66 |
+29:05:50.9 |
HIP 38586 |
20.05 |
| 2026-05-19 12:00 |
07:56:16.63 |
+29:03:14.8 |
HIP 38586 |
30.39 |
| 2026-05-20 00:00 |
07:57:02.65 |
+29:00:37.9 |
HIP 38921 |
32.37 |
| 2026-05-20 12:00 |
07:57:48.74 |
+28:58:00.3 |
HIP 38921 |
33.02 |
| 2026-05-21 00:00 |
07:58:34.89 |
+28:55:22.0 |
HIP 39157 |
31.07 |
| 2026-05-21 12:00 |
07:59:21.10 |
+28:52:42.9 |
HIP 39157 |
25.49 |
| 2026-05-22 00:00 |
08:00:07.37 |
+28:50:03.0 |
HIP 39157 |
23.50 |
| 2026-05-22 12:00 |
08:00:53.69 |
+28:47:22.4 |
HIP 39276 |
15.87 |
| 2026-05-23 00:00 |
08:01:40.07 |
+28:44:41.1 |
HIP 39276 |
7.17 |
| 2026-05-23 12:00 |
08:02:26.51 |
+28:41:59.0 |
HIP 39276 |
8.51 |
| 2026-05-24 00:00 |
08:03:12.99 |
+28:39:16.2 |
HIP 39276 |
17.77 |
| 2026-05-24 12:00 |
08:03:59.53 |
+28:36:32.7 |
HIP 39276 |
27.98 |
| 2026-05-25 00:00 |
08:04:46.12 |
+28:33:48.4 |
HIP 39729 |
32.73 |
| 2026-05-25 12:00 |
08:05:32.76 |
+28:31:03.3 |
HIP 39729 |
22.89 |
| 2026-05-26 00:00 |
08:06:19.44 |
+28:28:17.6 |
HIP 39729 |
14.18 |
| 2026-05-26 12:00 |
08:07:06.18 |
+28:25:31.1 |
HIP 39729 |
10.18 |
| 2026-05-27 00:00 |
08:07:52.96 |
+28:22:43.8 |
HIP 39729 |
15.26 |
| 2026-05-27 12:00 |
08:08:39.78 |
+28:19:55.8 |
HIP 39729 |
24.29 |
| 2026-05-28 00:00 |
08:09:26.65 |
+28:17:07.1 |
HIP 39729 |
34.29 |
| 2026-05-28 12:00 |
08:10:13.56 |
+28:14:17.6 |
HIP 40075 |
27.13 |
| 2026-05-29 00:00 |
08:11:00.51 |
+28:11:27.3 |
HIP 40075 |
21.33 |
| 2026-05-29 12:00 |
08:11:47.50 |
+28:08:36.4 |
HIP 40075 |
20.10 |
| 2026-05-30 00:00 |
08:12:34.54 |
+28:05:44.7 |
HIP 40278 |
17.14 |
| 2026-05-30 12:00 |
08:13:21.61 |
+28:02:52.2 |
HIP 40278 |
14.79 |
| 2026-05-31 00:00 |
08:14:08.72 |
+27:59:59.0 |
HIP 40311 |
13.69 |
| 2026-05-31 12:00 |
08:14:55.86 |
+27:57:05.1 |
HIP 40311 |
17.24 |
| 2026-06-01 00:00 |
08:15:43.05 |
+27:54:10.4 |
HIP 40311 |
25.33 |
| 2026-06-01 12:00 |
08:16:30.27 |
+27:51:15.0 |
HIP 40619 |
30.41 |
| 2026-06-02 00:00 |
08:17:17.52 |
+27:48:18.9 |
HIP 40619 |
24.40 |