463P/NEOWISE
| Parameter |
Value |
| Designation |
463P/NEOWISE |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2023-03-29T19:41:35.615040Z |
| Orbit solution date (soln_date, UTC) |
2024-04-13T16:43:14Z |
| Obs used |
114 |
| NEO |
Yes |
| M1 |
18.300 |
| K1 |
8.500 |
| PC |
- |
| Discovery observation (MPC, UTC) |
2018-04-22T23:03:48.672000Z |
| Discovery magnitude (MPC) |
19.00 R |
| Discovery observatory (MPC) |
C51 · WISE |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2021-08-07.0000000 |
| e |
0.82534605 |
| q (au) |
0.519825 |
| a (au) |
2.976315 |
| i (deg) |
29.440185 |
| Ω (om, deg) |
283.717498 |
| ω (w, deg) |
215.914075 |
| M (ma, deg) |
244.865061 |
Magnitude
Scatter + Global Linear
$$
M_a = (18.351 + 4.709\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.351 |
| n |
4.709 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.893 |
| 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) |
| 2026-02-03 00:00 |
21:04:08.07 |
-00:36:29.1 |
HIP 103889 |
25.57 |
| 2026-02-03 12:00 |
21:04:28.79 |
-00:34:38.6 |
HIP 103889 |
30.52 |
| 2026-02-04 00:00 |
21:04:49.51 |
-00:32:47.4 |
HIP 103889 |
35.63 |
| 2026-02-04 12:00 |
21:05:10.22 |
-00:30:55.5 |
HIP 104189 |
32.23 |
| 2026-02-05 00:00 |
21:05:30.93 |
-00:29:02.9 |
HIP 104189 |
27.59 |
| 2026-02-05 12:00 |
21:05:51.64 |
-00:27:09.7 |
HIP 104189 |
23.33 |
| 2026-02-06 00:00 |
21:06:12.34 |
-00:25:15.8 |
HIP 104189 |
19.68 |
| 2026-02-06 12:00 |
21:06:33.03 |
-00:23:21.3 |
HIP 104189 |
17.05 |
| 2026-02-07 00:00 |
21:06:53.72 |
-00:21:26.1 |
HIP 104279 |
15.18 |
| 2026-02-07 12:00 |
21:07:14.40 |
-00:19:30.2 |
HIP 104279 |
10.72 |
| 2026-02-08 00:00 |
21:07:35.07 |
-00:17:33.7 |
HIP 104279 |
7.75 |
| 2026-02-08 12:00 |
21:07:55.73 |
-00:15:36.5 |
HIP 104279 |
8.13 |
| 2026-02-09 00:00 |
21:08:16.38 |
-00:13:38.7 |
HIP 104279 |
11.52 |
| 2026-02-09 12:00 |
21:08:37.02 |
-00:11:40.3 |
HIP 104430 |
10.04 |
| 2026-02-10 00:00 |
21:08:57.64 |
-00:09:41.2 |
HIP 104430 |
6.36 |
| 2026-02-10 12:00 |
21:09:18.26 |
-00:07:41.4 |
HIP 104430 |
6.43 |
| 2026-02-11 00:00 |
21:09:38.86 |
-00:05:41.0 |
HIP 104430 |
10.17 |
| 2026-02-11 12:00 |
21:09:59.45 |
-00:03:40.0 |
HIP 104430 |
15.06 |
| 2026-02-12 00:00 |
21:10:20.03 |
-00:01:38.4 |
HIP 104430 |
20.29 |
| 2026-02-12 12:00 |
21:10:40.59 |
+00:00:23.9 |
HIP 104651 |
19.36 |
| 2026-02-13 00:00 |
21:11:01.13 |
+00:02:26.8 |
HIP 104651 |
15.06 |
| 2026-02-13 12:00 |
21:11:21.66 |
+00:04:30.3 |
HIP 104651 |
11.84 |
| 2026-02-14 00:00 |
21:11:42.17 |
+00:06:34.4 |
HIP 104651 |
10.72 |
| 2026-02-14 12:00 |
21:12:02.66 |
+00:08:39.2 |
HIP 104651 |
12.29 |
| 2026-02-15 00:00 |
21:12:23.13 |
+00:10:44.5 |
HIP 104651 |
15.76 |
| 2026-02-15 12:00 |
21:12:43.58 |
+00:12:50.5 |
HIP 104651 |
20.18 |
| 2026-02-16 00:00 |
21:13:04.01 |
+00:14:57.0 |
HIP 104651 |
25.05 |
| 2026-02-16 12:00 |
21:13:24.42 |
+00:17:04.2 |
HIP 104872 |
21.51 |
| 2026-02-17 00:00 |
21:13:44.80 |
+00:19:12.0 |
HIP 104872 |
18.90 |
| 2026-02-17 12:00 |
21:14:05.16 |
+00:21:20.3 |
HIP 104872 |
17.70 |
| 2026-02-18 00:00 |
21:14:25.50 |
+00:23:29.3 |
HIP 104872 |
18.18 |
| 2026-02-18 12:00 |
21:14:45.82 |
+00:25:38.8 |
HIP 104872 |
20.23 |
| 2026-02-19 00:00 |
21:15:06.10 |
+00:27:48.9 |
HIP 104930 |
23.41 |
| 2026-02-19 12:00 |
21:15:26.36 |
+00:29:59.5 |
HIP 104930 |
25.49 |
| 2026-02-20 00:00 |
21:15:46.60 |
+00:32:10.8 |
HIP 104930 |
28.51 |
| 2026-02-20 12:00 |
21:16:06.80 |
+00:34:22.6 |
HIP 105059 |
30.07 |
| 2026-02-21 00:00 |
21:16:26.98 |
+00:36:35.0 |
HIP 105059 |
26.17 |
| 2026-02-21 12:00 |
21:16:47.12 |
+00:38:47.9 |
HIP 105059 |
22.93 |
| 2026-02-22 00:00 |
21:17:07.24 |
+00:41:01.4 |
HIP 105059 |
20.66 |
| 2026-02-22 12:00 |
21:17:27.32 |
+00:43:15.4 |
HIP 105059 |
19.69 |
| 2026-02-23 00:00 |
21:17:47.37 |
+00:45:30.0 |
HIP 105059 |
20.22 |
| 2026-02-23 12:00 |
21:18:07.39 |
+00:47:45.1 |
HIP 105059 |
22.12 |
| 2026-02-24 00:00 |
21:18:27.38 |
+00:50:00.7 |
HIP 105059 |
25.10 |