| 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
$$
M_a = (20.000 + 3.593\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
3.593 |
| gf |
1.000 |
| gb |
-0.804 |
| k |
0.821 |
| 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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
08:18:04.81 |
+27:45:22.0 |
HIP 40619 |
22.41 |
| 2026-06-03 00:00 |
08:18:52.13 |
+27:42:24.4 |
HIP 40619 |
25.41 |
| 2026-06-03 12:00 |
08:19:39.48 |
+27:39:26.0 |
HIP 40843 |
26.87 |
| 2026-06-04 00:00 |
08:20:26.87 |
+27:36:26.9 |
HIP 40843 |
23.88 |
| 2026-06-04 12:00 |
08:21:14.28 |
+27:33:27.0 |
HIP 41071 |
20.93 |
| 2026-06-05 00:00 |
08:22:01.73 |
+27:30:26.4 |
HIP 41071 |
10.36 |
| 2026-06-05 12:00 |
08:22:49.20 |
+27:27:25.1 |
HIP 41071 |
4.02 |
| 2026-06-06 00:00 |
08:23:36.71 |
+27:24:23.1 |
HIP 41071 |
12.85 |
| 2026-06-06 12:00 |
08:24:24.24 |
+27:21:20.3 |
HIP 41071 |
23.57 |
| 2026-06-07 00:00 |
08:25:11.80 |
+27:18:16.7 |
HIP 41404 |
30.66 |
| 2026-06-07 12:00 |
08:25:59.39 |
+27:15:12.4 |
HIP 41404 |
21.83 |
| 2026-06-08 00:00 |
08:26:47.00 |
+27:12:07.4 |
HIP 41404 |
15.99 |
| 2026-06-08 12:00 |
08:27:34.64 |
+27:09:01.7 |
HIP 41404 |
16.69 |
| 2026-06-09 00:00 |
08:28:22.30 |
+27:05:55.2 |
HIP 41469 |
18.93 |
| 2026-06-09 12:00 |
08:29:09.99 |
+27:02:48.0 |
HIP 41469 |
25.05 |
| 2026-06-10 00:00 |
08:29:57.70 |
+26:59:40.0 |
HIP 41469 |
33.81 |
| 2026-06-10 12:00 |
08:30:45.43 |
+26:56:31.3 |
HIP 41469 |
43.65 |
| 2026-06-11 00:00 |
08:31:33.19 |
+26:53:21.9 |
HIP 41999 |
38.98 |
| 2026-06-11 12:00 |
08:32:20.97 |
+26:50:11.8 |
HIP 41950 |
34.52 |
| 2026-06-12 00:00 |
08:33:08.76 |
+26:47:00.9 |
HIP 41950 |
29.93 |
| 2026-06-12 12:00 |
08:33:56.58 |
+26:43:49.3 |
HIP 41950 |
29.12 |
| 2026-06-13 00:00 |
08:34:44.42 |
+26:40:37.0 |
HIP 41950 |
32.40 |
| 2026-06-13 12:00 |
08:35:32.27 |
+26:37:23.9 |
HIP 42326 |
37.95 |
| 2026-06-14 00:00 |
08:36:20.15 |
+26:34:10.2 |
HIP 42326 |
27.77 |
| 2026-06-14 12:00 |
08:37:08.04 |
+26:30:55.7 |
HIP 42326 |
18.78 |
| 2026-06-15 00:00 |
08:37:55.94 |
+26:27:40.5 |
HIP 42326 |
13.58 |
| 2026-06-15 12:00 |
08:38:43.86 |
+26:24:24.6 |
HIP 42326 |
16.36 |
| 2026-06-16 00:00 |
08:39:31.80 |
+26:21:08.0 |
HIP 42326 |
24.56 |
| 2026-06-16 12:00 |
08:40:19.75 |
+26:17:50.7 |
HIP 42356 |
32.98 |
| 2026-06-17 00:00 |
08:41:07.71 |
+26:14:32.6 |
HIP 42746 |
24.07 |
| 2026-06-17 12:00 |
08:41:55.68 |
+26:11:13.9 |
HIP 42746 |
13.17 |
| 2026-06-18 00:00 |
08:42:43.67 |
+26:07:54.5 |
HIP 42746 |
4.57 |
| 2026-06-18 12:00 |
08:43:31.66 |
+26:04:34.4 |
HIP 42746 |
11.07 |
| 2026-06-19 00:00 |
08:44:19.66 |
+26:01:13.6 |
HIP 42891 |
1.75 |
| 2026-06-19 12:00 |
08:45:07.67 |
+25:57:52.1 |
HIP 42891 |
9.87 |
| 2026-06-20 00:00 |
08:45:55.69 |
+25:54:30.0 |
HIP 42891 |
21.16 |
| 2026-06-20 12:00 |
08:46:43.72 |
+25:51:07.1 |
HIP 43111 |
22.73 |
| 2026-06-21 00:00 |
08:47:31.75 |
+25:47:43.6 |
HIP 43111 |
21.58 |
| 2026-06-21 12:00 |
08:48:19.78 |
+25:44:19.4 |
HIP 43111 |
25.93 |
| 2026-06-22 00:00 |
08:49:07.82 |
+25:40:54.6 |
HIP 43111 |
33.71 |