| Parameter |
Value |
| Designation |
473P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2001-11-04T17:20:30.220800Z |
| Orbit solution date (soln_date, UTC) |
2024-06-30T00:42:21Z |
| Obs used |
520 |
| NEO |
- |
| M1 |
11.200 |
| K1 |
25.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-08-01.0000000 |
| e |
0.82249544 |
| q (au) |
1.407115 |
| a (au) |
7.927206 |
| i (deg) |
56.948538 |
| Ω (om, deg) |
22.184978 |
| ω (w, deg) |
43.106501 |
| M (ma, deg) |
108.688703 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.080 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.080 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2023-11-29 |
2024-05-08 |
+16.9214 |
-4.614 |
| 2024-05-08 |
2024-06-25 |
-14.5858 |
+3.980 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-07-29 00:00 |
12:58:50.69 |
-11:27:39.3 |
HIP 63349 |
2.62 |
| 2026-07-29 12:00 |
12:58:56.71 |
-11:28:42.0 |
HIP 63349 |
2.11 |
| 2026-07-30 00:00 |
12:59:02.83 |
-11:29:45.2 |
HIP 63349 |
2.94 |
| 2026-07-30 12:00 |
12:59:09.05 |
-11:30:49.0 |
HIP 63349 |
4.45 |
| 2026-07-31 00:00 |
12:59:15.36 |
-11:31:53.4 |
HIP 63400 |
3.92 |
| 2026-07-31 12:00 |
12:59:21.76 |
-11:32:58.4 |
HIP 63400 |
2.21 |
| 2026-08-01 00:00 |
12:59:28.26 |
-11:34:03.9 |
HIP 63400 |
1.29 |
| 2026-08-01 12:00 |
12:59:34.85 |
-11:35:09.9 |
HIP 63400 |
2.45 |
| 2026-08-02 00:00 |
12:59:41.53 |
-11:36:16.5 |
HIP 63400 |
4.26 |
| 2026-08-02 12:00 |
12:59:48.31 |
-11:37:23.6 |
HIP 63400 |
6.19 |
| 2026-08-03 00:00 |
12:59:55.18 |
-11:38:31.3 |
HIP 63400 |
8.18 |
| 2026-08-03 12:00 |
13:00:02.14 |
-11:39:39.5 |
HIP 63400 |
10.21 |
| 2026-08-04 00:00 |
13:00:09.18 |
-11:40:48.2 |
HIP 63400 |
12.26 |
| 2026-08-04 12:00 |
13:00:16.32 |
-11:41:57.5 |
HIP 63400 |
14.35 |
| 2026-08-05 00:00 |
13:00:23.55 |
-11:43:07.3 |
HIP 63400 |
16.46 |
| 2026-08-05 12:00 |
13:00:30.86 |
-11:44:17.7 |
HIP 63400 |
18.59 |
| 2026-08-06 00:00 |
13:00:38.27 |
-11:45:28.6 |
HIP 63400 |
20.75 |
| 2026-08-06 12:00 |
13:00:45.76 |
-11:46:39.9 |
HIP 63400 |
22.93 |
| 2026-08-07 00:00 |
13:00:53.34 |
-11:47:51.9 |
HIP 63400 |
25.13 |
| 2026-08-07 12:00 |
13:01:01.00 |
-11:49:04.3 |
HIP 63610 |
24.79 |
| 2026-08-08 00:00 |
13:01:08.75 |
-11:50:17.2 |
HIP 63610 |
22.59 |
| 2026-08-08 12:00 |
13:01:16.59 |
-11:51:30.7 |
HIP 63610 |
20.38 |
| 2026-08-09 00:00 |
13:01:24.51 |
-11:52:44.7 |
HIP 63610 |
18.18 |
| 2026-08-09 12:00 |
13:01:32.51 |
-11:53:59.2 |
HIP 63610 |
15.97 |
| 2026-08-10 00:00 |
13:01:40.60 |
-11:55:14.2 |
HIP 63610 |
13.79 |
| 2026-08-10 12:00 |
13:01:48.77 |
-11:56:29.7 |
HIP 63610 |
11.65 |
| 2026-08-11 00:00 |
13:01:57.02 |
-11:57:45.7 |
HIP 63610 |
9.60 |
| 2026-08-11 12:00 |
13:02:05.35 |
-11:59:02.2 |
HIP 63610 |
7.73 |
| 2026-08-12 00:00 |
13:02:13.77 |
-12:00:19.1 |
HIP 63610 |
6.22 |
| 2026-08-12 12:00 |
13:02:22.26 |
-12:01:36.6 |
HIP 63610 |
5.43 |
| 2026-08-13 00:00 |
13:02:30.83 |
-12:02:54.6 |
HIP 63610 |
5.69 |
| 2026-08-13 12:00 |
13:02:39.48 |
-12:04:13.0 |
HIP 63610 |
6.90 |
| 2026-08-14 00:00 |
13:02:48.21 |
-12:05:32.0 |
HIP 63610 |
8.69 |
| 2026-08-14 12:00 |
13:02:57.02 |
-12:06:51.4 |
HIP 63610 |
10.79 |
| 2026-08-15 00:00 |
13:03:05.90 |
-12:08:11.2 |
HIP 63610 |
13.06 |
| 2026-08-15 12:00 |
13:03:14.86 |
-12:09:31.6 |
HIP 63610 |
15.44 |
| 2026-08-16 00:00 |
13:03:23.90 |
-12:10:52.4 |
HIP 63610 |
17.89 |
| 2026-08-16 12:00 |
13:03:33.01 |
-12:12:13.7 |
HIP 63610 |
20.39 |
| 2026-08-17 00:00 |
13:03:42.19 |
-12:13:35.4 |
HIP 63610 |
22.93 |
| 2026-08-17 12:00 |
13:03:51.44 |
-12:14:57.6 |
HIP 63610 |
25.51 |
| 2026-08-18 00:00 |
13:04:00.77 |
-12:16:20.2 |
HIP 63897 |
25.57 |
| 2026-08-18 12:00 |
13:04:10.17 |
-12:17:43.3 |
HIP 63897 |
23.03 |
| 2026-08-19 00:00 |
13:04:19.64 |
-12:19:06.8 |
HIP 63897 |
20.51 |