| 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) |
| 2026-06-01 00:00 |
00:12:03.50 |
+01:01:57.1 |
HIP 1087 |
24.85 |
| 2026-06-01 12:00 |
00:12:09.79 |
+01:02:45.8 |
HIP 1087 |
23.85 |
| 2026-06-02 00:00 |
00:12:16.01 |
+01:03:34.0 |
HIP 1087 |
22.95 |
| 2026-06-02 12:00 |
00:12:22.16 |
+01:04:21.8 |
HIP 1087 |
22.17 |
| 2026-06-03 00:00 |
00:12:28.23 |
+01:05:09.0 |
HIP 1087 |
21.50 |
| 2026-06-03 12:00 |
00:12:34.23 |
+01:05:55.8 |
HIP 1087 |
20.97 |
| 2026-06-04 00:00 |
00:12:40.15 |
+01:06:42.1 |
HIP 1087 |
20.56 |
| 2026-06-04 12:00 |
00:12:46.00 |
+01:07:27.9 |
HIP 1087 |
20.28 |
| 2026-06-05 00:00 |
00:12:51.77 |
+01:08:13.2 |
HIP 1087 |
20.14 |
| 2026-06-05 12:00 |
00:12:57.46 |
+01:08:58.1 |
HIP 1107 |
18.82 |
| 2026-06-06 00:00 |
00:13:03.08 |
+01:09:42.4 |
HIP 1107 |
17.35 |
| 2026-06-06 12:00 |
00:13:08.61 |
+01:10:26.3 |
HIP 1107 |
15.91 |
| 2026-06-07 00:00 |
00:13:14.08 |
+01:11:09.7 |
HIP 1107 |
14.52 |
| 2026-06-07 12:00 |
00:13:19.46 |
+01:11:52.5 |
HIP 1107 |
13.18 |
| 2026-06-08 00:00 |
00:13:24.76 |
+01:12:34.9 |
HIP 1107 |
11.89 |
| 2026-06-08 12:00 |
00:13:29.99 |
+01:13:16.7 |
HIP 1107 |
10.69 |
| 2026-06-09 00:00 |
00:13:35.13 |
+01:13:58.1 |
HIP 1107 |
9.57 |
| 2026-06-09 12:00 |
00:13:40.20 |
+01:14:38.9 |
HIP 1107 |
8.57 |
| 2026-06-10 00:00 |
00:13:45.19 |
+01:15:19.3 |
HIP 1107 |
7.72 |
| 2026-06-10 12:00 |
00:13:50.09 |
+01:15:59.1 |
HIP 1107 |
7.06 |
| 2026-06-11 00:00 |
00:13:54.92 |
+01:16:38.4 |
HIP 1107 |
6.64 |
| 2026-06-11 12:00 |
00:13:59.66 |
+01:17:17.2 |
HIP 1107 |
6.48 |
| 2026-06-12 00:00 |
00:14:04.32 |
+01:17:55.4 |
HIP 1107 |
6.59 |
| 2026-06-12 12:00 |
00:14:08.90 |
+01:18:33.2 |
HIP 1107 |
6.95 |
| 2026-06-13 00:00 |
00:14:13.40 |
+01:19:10.4 |
HIP 1169 |
5.95 |
| 2026-06-13 12:00 |
00:14:17.81 |
+01:19:47.1 |
HIP 1169 |
5.08 |
| 2026-06-14 00:00 |
00:14:22.14 |
+01:20:23.2 |
HIP 1169 |
4.43 |
| 2026-06-14 12:00 |
00:14:26.39 |
+01:20:58.8 |
HIP 1169 |
4.06 |
| 2026-06-15 00:00 |
00:14:30.55 |
+01:21:33.9 |
HIP 1169 |
4.04 |
| 2026-06-15 12:00 |
00:14:34.63 |
+01:22:08.5 |
HIP 1169 |
4.36 |
| 2026-06-16 00:00 |
00:14:38.62 |
+01:22:42.5 |
HIP 1169 |
4.92 |
| 2026-06-16 12:00 |
00:14:42.53 |
+01:23:16.0 |
HIP 1169 |
5.65 |
| 2026-06-17 00:00 |
00:14:46.35 |
+01:23:48.9 |
HIP 1169 |
6.48 |
| 2026-06-17 12:00 |
00:14:50.09 |
+01:24:21.3 |
HIP 1169 |
7.37 |
| 2026-06-18 00:00 |
00:14:53.74 |
+01:24:53.1 |
HIP 1169 |
8.28 |
| 2026-06-18 12:00 |
00:14:57.31 |
+01:25:24.4 |
HIP 1169 |
9.20 |
| 2026-06-19 00:00 |
00:15:00.79 |
+01:25:55.1 |
HIP 1169 |
10.12 |
| 2026-06-19 12:00 |
00:15:04.18 |
+01:26:25.3 |
HIP 1169 |
11.04 |
| 2026-06-20 00:00 |
00:15:07.49 |
+01:26:55.0 |
HIP 1169 |
11.94 |
| 2026-06-20 12:00 |
00:15:10.71 |
+01:27:24.1 |
HIP 1169 |
12.84 |
| 2026-06-21 00:00 |
00:15:13.84 |
+01:27:52.6 |
HIP 1169 |
13.72 |
| 2026-06-21 12:00 |
00:15:16.88 |
+01:28:20.6 |
HIP 1169 |
14.58 |
| 2026-06-22 00:00 |
00:15:19.84 |
+01:28:48.0 |
HIP 1169 |
15.42 |