| Parameter |
Value |
| Designation |
P/2003 F2 (NEAT) |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2003-04-14T18:46:40.431360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:27Z |
| Obs used |
74 |
| NEO |
- |
| M1 |
13.700 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2003-04-06.0000000 |
| e |
0.54224939 |
| q (au) |
2.977207 |
| a (au) |
6.503993 |
| i (deg) |
11.604533 |
| Ω (om, deg) |
359.028575 |
| ω (w, deg) |
191.592692 |
| M (ma, deg) |
359.478147 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.477 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.477 |
| n |
2.000 |
| gf |
0.982 |
| gb |
-0.948 |
| k |
1.000 |
| δ90 |
9.631 |
| 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) |
| 2026-09-20 00:00 |
00:01:20.76 |
+00:25:57.3 |
HIP 56 |
16.33 |
| 2026-09-20 12:00 |
00:01:10.94 |
+00:25:03.2 |
HIP 56 |
14.13 |
| 2026-09-21 00:00 |
00:01:01.11 |
+00:24:09.0 |
HIP 56 |
12.10 |
| 2026-09-21 12:00 |
00:00:51.29 |
+00:23:14.8 |
HIP 56 |
10.33 |
| 2026-09-22 00:00 |
00:00:41.46 |
+00:22:20.5 |
HIP 56 |
8.99 |
| 2026-09-22 12:00 |
00:00:31.62 |
+00:21:26.3 |
HIP 56 |
8.27 |
| 2026-09-23 00:00 |
00:00:21.79 |
+00:20:32.0 |
HIP 56 |
8.36 |
| 2026-09-23 12:00 |
00:00:11.96 |
+00:19:37.7 |
HIP 56 |
9.22 |
| 2026-09-24 00:00 |
00:00:02.13 |
+00:18:43.4 |
HIP 56 |
10.67 |
| 2026-09-24 12:00 |
23:59:52.30 |
+00:17:49.1 |
HIP 56 |
12.51 |
| 2026-09-25 00:00 |
23:59:42.48 |
+00:16:54.9 |
HIP 56 |
14.59 |
| 2026-09-25 12:00 |
23:59:32.66 |
+00:16:00.6 |
HIP 56 |
16.81 |
| 2026-09-26 00:00 |
23:59:22.85 |
+00:15:06.4 |
HIP 56 |
19.14 |
| 2026-09-26 12:00 |
23:59:13.04 |
+00:14:12.2 |
HIP 56 |
21.52 |
| 2026-09-27 00:00 |
23:59:03.25 |
+00:13:18.1 |
HIP 56 |
23.96 |
| 2026-09-27 12:00 |
23:58:53.46 |
+00:12:24.0 |
HIP 118159 |
23.52 |
| 2026-09-28 00:00 |
23:58:43.69 |
+00:11:30.0 |
HIP 118159 |
21.54 |
| 2026-09-28 12:00 |
23:58:33.92 |
+00:10:36.0 |
HIP 118159 |
19.71 |
| 2026-09-29 00:00 |
23:58:24.17 |
+00:09:42.1 |
HIP 118159 |
18.07 |
| 2026-09-29 12:00 |
23:58:14.43 |
+00:08:48.2 |
HIP 118159 |
16.68 |
| 2026-09-30 00:00 |
23:58:04.71 |
+00:07:54.5 |
HIP 118159 |
15.60 |
| 2026-09-30 12:00 |
23:57:55.00 |
+00:07:00.8 |
HIP 118159 |
14.90 |
| 2026-10-01 00:00 |
23:57:45.31 |
+00:06:07.3 |
HIP 118159 |
14.62 |
| 2026-10-01 12:00 |
23:57:35.63 |
+00:05:13.8 |
HIP 118159 |
14.81 |
| 2026-10-02 00:00 |
23:57:25.98 |
+00:04:20.4 |
HIP 118159 |
15.42 |
| 2026-10-02 12:00 |
23:57:16.35 |
+00:03:27.2 |
HIP 118159 |
16.41 |
| 2026-10-03 00:00 |
23:57:06.73 |
+00:02:34.1 |
HIP 118159 |
17.73 |
| 2026-10-03 12:00 |
23:56:57.14 |
+00:01:41.1 |
HIP 118159 |
19.29 |
| 2026-10-04 00:00 |
23:56:47.58 |
+00:00:48.2 |
HIP 118159 |
21.04 |
| 2026-10-04 12:00 |
23:56:38.04 |
-00:00:04.5 |
HIP 118159 |
22.93 |
| 2026-10-05 00:00 |
23:56:28.52 |
-00:00:57.0 |
HIP 118159 |
24.94 |
| 2026-10-05 12:00 |
23:56:19.03 |
-00:01:49.4 |
HIP 117887 |
24.57 |
| 2026-10-06 00:00 |
23:56:09.57 |
-00:02:41.7 |
HIP 117887 |
22.70 |
| 2026-10-06 12:00 |
23:56:00.14 |
-00:03:33.7 |
HIP 117887 |
20.98 |
| 2026-10-07 00:00 |
23:55:50.74 |
-00:04:25.6 |
HIP 117902 |
19.25 |
| 2026-10-07 12:00 |
23:55:41.37 |
-00:05:17.3 |
HIP 117902 |
16.94 |
| 2026-10-08 00:00 |
23:55:32.04 |
-00:06:08.8 |
HIP 117902 |
14.71 |
| 2026-10-08 12:00 |
23:55:22.74 |
-00:07:00.0 |
HIP 117902 |
12.58 |
| 2026-10-09 00:00 |
23:55:13.47 |
-00:07:51.1 |
HIP 117902 |
10.61 |
| 2026-10-09 12:00 |
23:55:04.24 |
-00:08:42.0 |
HIP 117902 |
8.90 |
| 2026-10-10 00:00 |
23:54:55.04 |
-00:09:32.6 |
HIP 117902 |
7.61 |
| 2026-10-10 12:00 |
23:54:45.89 |
-00:10:23.0 |
HIP 117902 |
6.98 |
| 2026-10-11 00:00 |
23:54:36.77 |
-00:11:13.1 |
HIP 117902 |
7.17 |