| 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
$$
M_a = (18.352 + 4.710\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
18.352 |
| n |
4.710 |
| 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) |
| 2026-07-29 00:00 |
21:34:12.03 |
+12:04:43.3 |
HIP 106513 |
11.07 |
| 2026-07-29 12:00 |
21:33:50.61 |
+12:04:33.7 |
HIP 106513 |
13.53 |
| 2026-07-30 00:00 |
21:33:29.09 |
+12:04:22.3 |
HIP 106513 |
17.31 |
| 2026-07-30 12:00 |
21:33:07.48 |
+12:04:09.0 |
HIP 106361 |
15.68 |
| 2026-07-31 00:00 |
21:32:45.77 |
+12:03:53.9 |
HIP 106361 |
13.27 |
| 2026-07-31 12:00 |
21:32:23.97 |
+12:03:36.8 |
HIP 106361 |
12.73 |
| 2026-08-01 00:00 |
21:32:02.08 |
+12:03:17.9 |
HIP 106283 |
11.70 |
| 2026-08-01 12:00 |
21:31:40.10 |
+12:02:57.1 |
HIP 106243 |
9.14 |
| 2026-08-02 00:00 |
21:31:18.04 |
+12:02:34.4 |
HIP 106243 |
6.04 |
| 2026-08-02 12:00 |
21:30:55.90 |
+12:02:09.9 |
HIP 106243 |
6.95 |
| 2026-08-03 00:00 |
21:30:33.68 |
+12:01:43.4 |
HIP 106243 |
10.94 |
| 2026-08-03 12:00 |
21:30:11.39 |
+12:01:15.1 |
HIP 106157 |
15.03 |
| 2026-08-04 00:00 |
21:29:49.02 |
+12:00:44.9 |
HIP 106075 |
9.76 |
| 2026-08-04 12:00 |
21:29:26.58 |
+12:00:12.8 |
HIP 106075 |
4.71 |
| 2026-08-05 00:00 |
21:29:04.07 |
+11:59:38.9 |
HIP 106075 |
3.12 |
| 2026-08-05 12:00 |
21:28:41.50 |
+11:59:03.1 |
HIP 106075 |
7.66 |
| 2026-08-06 00:00 |
21:28:18.87 |
+11:58:25.3 |
HIP 106075 |
13.02 |
| 2026-08-06 12:00 |
21:27:56.18 |
+11:57:45.8 |
HIP 105923 |
11.18 |
| 2026-08-07 00:00 |
21:27:33.43 |
+11:57:04.3 |
HIP 105923 |
6.12 |
| 2026-08-07 12:00 |
21:27:10.63 |
+11:56:21.0 |
HIP 105923 |
3.60 |
| 2026-08-08 00:00 |
21:26:47.78 |
+11:55:35.8 |
HIP 105923 |
7.22 |
| 2026-08-08 12:00 |
21:26:24.88 |
+11:54:48.8 |
HIP 105923 |
12.46 |
| 2026-08-09 00:00 |
21:26:01.94 |
+11:53:59.9 |
HIP 105793 |
16.63 |
| 2026-08-09 12:00 |
21:25:38.96 |
+11:53:09.1 |
HIP 105793 |
14.22 |
| 2026-08-10 00:00 |
21:25:15.94 |
+11:52:16.5 |
HIP 105793 |
13.84 |
| 2026-08-10 12:00 |
21:24:52.89 |
+11:51:22.1 |
HIP 105793 |
15.66 |
| 2026-08-11 00:00 |
21:24:29.81 |
+11:50:25.8 |
HIP 105793 |
19.08 |
| 2026-08-11 12:00 |
21:24:06.70 |
+11:49:27.7 |
HIP 105793 |
23.41 |
| 2026-08-12 00:00 |
21:23:43.56 |
+11:48:27.8 |
HIP 105793 |
28.24 |
| 2026-08-12 12:00 |
21:23:20.41 |
+11:47:26.1 |
HIP 105793 |
33.36 |
| 2026-08-13 00:00 |
21:22:57.24 |
+11:46:22.6 |
HIP 105365 |
37.36 |
| 2026-08-13 12:00 |
21:22:34.06 |
+11:45:17.3 |
HIP 105365 |
31.61 |
| 2026-08-14 00:00 |
21:22:10.86 |
+11:44:10.2 |
HIP 105365 |
25.86 |
| 2026-08-14 12:00 |
21:21:47.66 |
+11:43:01.3 |
HIP 105365 |
20.12 |
| 2026-08-15 00:00 |
21:21:24.45 |
+11:41:50.7 |
HIP 105365 |
14.41 |
| 2026-08-15 12:00 |
21:21:01.25 |
+11:40:38.4 |
HIP 105365 |
8.81 |
| 2026-08-16 00:00 |
21:20:38.05 |
+11:39:24.3 |
HIP 105365 |
3.85 |
| 2026-08-16 12:00 |
21:20:14.85 |
+11:38:08.5 |
HIP 105365 |
4.41 |
| 2026-08-17 00:00 |
21:19:51.67 |
+11:36:51.0 |
HIP 105365 |
9.58 |
| 2026-08-17 12:00 |
21:19:28.49 |
+11:35:31.8 |
HIP 105200 |
13.21 |
| 2026-08-18 00:00 |
21:19:05.34 |
+11:34:10.9 |
HIP 105200 |
7.47 |
| 2026-08-18 12:00 |
21:18:42.20 |
+11:32:48.4 |
HIP 105200 |
2.24 |
| 2026-08-19 00:00 |
21:18:19.09 |
+11:31:24.2 |
HIP 105200 |
4.73 |