| Parameter |
Value |
| Designation |
504P/WISE-PANSTARRS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2025-04-08T22:54:56.698560Z |
| Orbit solution date (soln_date, UTC) |
2025-08-01T17:26:05Z |
| Obs used |
411 |
| NEO |
- |
| M1 |
4.900 |
| K1 |
35.250 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2010-06-14T16:55:15.628800Z |
| Discovery magnitude (MPC) |
- |
| Discovery observatory (MPC) |
C51 · WISE |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2024-11-02.0000000 |
| e |
0.40602522 |
| q (au) |
2.224152 |
| a (au) |
3.744523 |
| i (deg) |
8.806861 |
| Ω (om, deg) |
221.121771 |
| ω (w, deg) |
308.496922 |
| M (ma, deg) |
338.514665 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.142 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.142 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
18:51:14.21 |
-13:27:07.3 |
HIP 92498 |
2.71 |
| 2026-06-01 12:00 |
18:50:56.73 |
-13:26:12.4 |
HIP 92498 |
1.68 |
| 2026-06-02 00:00 |
18:50:39.03 |
-13:25:18.4 |
HIP 92498 |
6.06 |
| 2026-06-02 12:00 |
18:50:21.11 |
-13:24:25.2 |
HIP 92456 |
10.21 |
| 2026-06-03 00:00 |
18:50:02.98 |
-13:23:33.0 |
HIP 92456 |
12.78 |
| 2026-06-03 12:00 |
18:49:44.64 |
-13:22:41.6 |
HIP 92456 |
16.23 |
| 2026-06-04 00:00 |
18:49:26.09 |
-13:21:51.1 |
HIP 92456 |
20.15 |
| 2026-06-04 12:00 |
18:49:07.34 |
-13:21:01.5 |
HIP 92456 |
24.34 |
| 2026-06-05 00:00 |
18:48:48.39 |
-13:20:12.9 |
HIP 92456 |
28.70 |
| 2026-06-05 12:00 |
18:48:29.24 |
-13:19:25.1 |
HIP 92456 |
33.19 |
| 2026-06-06 00:00 |
18:48:09.90 |
-13:18:38.2 |
HIP 92323 |
37.64 |
| 2026-06-06 12:00 |
18:47:50.37 |
-13:17:52.2 |
HIP 92022 |
35.92 |
| 2026-06-07 00:00 |
18:47:30.65 |
-13:17:07.1 |
HIP 92022 |
31.06 |
| 2026-06-07 12:00 |
18:47:10.76 |
-13:16:23.0 |
HIP 92022 |
26.17 |
| 2026-06-08 00:00 |
18:46:50.68 |
-13:15:39.7 |
HIP 92022 |
21.23 |
| 2026-06-08 12:00 |
18:46:30.43 |
-13:14:57.4 |
HIP 92022 |
16.25 |
| 2026-06-09 00:00 |
18:46:10.01 |
-13:14:16.0 |
HIP 92022 |
11.24 |
| 2026-06-09 12:00 |
18:45:49.43 |
-13:13:35.5 |
HIP 92022 |
6.19 |
| 2026-06-10 00:00 |
18:45:28.69 |
-13:12:56.0 |
HIP 92022 |
1.18 |
| 2026-06-10 12:00 |
18:45:07.78 |
-13:12:17.3 |
HIP 92022 |
4.08 |
| 2026-06-11 00:00 |
18:44:46.73 |
-13:11:39.6 |
HIP 91929 |
5.37 |
| 2026-06-11 12:00 |
18:44:25.53 |
-13:11:02.9 |
HIP 91929 |
1.75 |
| 2026-06-12 00:00 |
18:44:04.18 |
-13:10:27.0 |
HIP 91929 |
5.62 |
| 2026-06-12 12:00 |
18:43:42.70 |
-13:09:52.1 |
HIP 91929 |
10.74 |
| 2026-06-13 00:00 |
18:43:21.08 |
-13:09:18.2 |
HIP 91929 |
15.99 |
| 2026-06-13 12:00 |
18:42:59.33 |
-13:08:45.2 |
HIP 91929 |
21.28 |
| 2026-06-14 00:00 |
18:42:37.46 |
-13:08:13.1 |
HIP 91929 |
26.62 |
| 2026-06-14 12:00 |
18:42:15.47 |
-13:07:41.9 |
HIP 91608 |
24.20 |
| 2026-06-15 00:00 |
18:41:53.36 |
-13:07:11.7 |
HIP 91597 |
20.58 |
| 2026-06-15 12:00 |
18:41:31.15 |
-13:06:42.5 |
HIP 91597 |
17.07 |
| 2026-06-16 00:00 |
18:41:08.82 |
-13:06:14.1 |
HIP 91597 |
14.76 |
| 2026-06-16 12:00 |
18:40:46.41 |
-13:05:46.8 |
HIP 91597 |
14.26 |
| 2026-06-17 00:00 |
18:40:23.89 |
-13:05:20.3 |
HIP 91597 |
15.76 |
| 2026-06-17 12:00 |
18:40:01.29 |
-13:04:54.8 |
HIP 91597 |
18.81 |
| 2026-06-18 00:00 |
18:39:38.60 |
-13:04:30.2 |
HIP 91597 |
22.82 |
| 2026-06-18 12:00 |
18:39:15.84 |
-13:04:06.6 |
HIP 91597 |
27.37 |
| 2026-06-19 00:00 |
18:38:53.00 |
-13:03:43.8 |
HIP 91428 |
27.06 |
| 2026-06-19 12:00 |
18:38:30.10 |
-13:03:22.0 |
HIP 91277 |
22.20 |
| 2026-06-20 00:00 |
18:38:07.13 |
-13:03:01.2 |
HIP 91277 |
17.08 |
| 2026-06-20 12:00 |
18:37:44.11 |
-13:02:41.2 |
HIP 91277 |
12.40 |
| 2026-06-21 00:00 |
18:37:21.03 |
-13:02:22.2 |
HIP 91277 |
8.87 |
| 2026-06-21 12:00 |
18:36:57.90 |
-13:02:04.1 |
HIP 91277 |
8.22 |
| 2026-06-22 00:00 |
18:36:34.73 |
-13:01:46.9 |
HIP 91277 |
10.97 |