| 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) |
| 2026-06-01 00:00 |
13:00:39.25 |
-10:39:32.8 |
HIP 63520 |
20.82 |
| 2026-06-01 12:00 |
13:00:30.57 |
-10:39:18.9 |
HIP 63520 |
21.62 |
| 2026-06-02 00:00 |
13:00:22.03 |
-10:39:05.6 |
HIP 63520 |
22.58 |
| 2026-06-02 12:00 |
13:00:13.64 |
-10:38:53.0 |
HIP 63520 |
23.65 |
| 2026-06-03 00:00 |
13:00:05.38 |
-10:38:41.0 |
HIP 63520 |
24.83 |
| 2026-06-03 12:00 |
12:59:57.26 |
-10:38:29.6 |
HIP 63520 |
26.09 |
| 2026-06-04 00:00 |
12:59:49.29 |
-10:38:18.9 |
HIP 63520 |
27.40 |
| 2026-06-04 12:00 |
12:59:41.45 |
-10:38:08.8 |
HIP 63520 |
28.76 |
| 2026-06-05 00:00 |
12:59:33.75 |
-10:37:59.4 |
HIP 63520 |
30.15 |
| 2026-06-05 12:00 |
12:59:26.20 |
-10:37:50.6 |
HIP 63520 |
31.55 |
| 2026-06-06 00:00 |
12:59:18.78 |
-10:37:42.4 |
HIP 63520 |
32.98 |
| 2026-06-06 12:00 |
12:59:11.51 |
-10:37:35.0 |
HIP 63520 |
34.40 |
| 2026-06-07 00:00 |
12:59:04.38 |
-10:37:28.2 |
HIP 63202 |
34.72 |
| 2026-06-07 12:00 |
12:58:57.39 |
-10:37:22.0 |
HIP 63202 |
33.25 |
| 2026-06-08 00:00 |
12:58:50.54 |
-10:37:16.5 |
HIP 63202 |
31.82 |
| 2026-06-08 12:00 |
12:58:43.83 |
-10:37:11.7 |
HIP 63202 |
30.43 |
| 2026-06-09 00:00 |
12:58:37.27 |
-10:37:07.5 |
HIP 63202 |
29.11 |
| 2026-06-09 12:00 |
12:58:30.84 |
-10:37:04.1 |
HIP 63202 |
27.83 |
| 2026-06-10 00:00 |
12:58:24.56 |
-10:37:01.2 |
HIP 63202 |
26.61 |
| 2026-06-10 12:00 |
12:58:18.42 |
-10:36:59.1 |
HIP 63202 |
25.44 |
| 2026-06-11 00:00 |
12:58:12.42 |
-10:36:57.7 |
HIP 63202 |
24.32 |
| 2026-06-11 12:00 |
12:58:06.56 |
-10:36:56.9 |
HIP 63202 |
23.27 |
| 2026-06-12 00:00 |
12:58:00.85 |
-10:36:56.8 |
HIP 63202 |
22.27 |
| 2026-06-12 12:00 |
12:57:55.27 |
-10:36:57.4 |
HIP 63202 |
21.34 |
| 2026-06-13 00:00 |
12:57:49.84 |
-10:36:58.7 |
HIP 63202 |
20.46 |
| 2026-06-13 12:00 |
12:57:44.55 |
-10:37:00.7 |
HIP 63202 |
19.65 |
| 2026-06-14 00:00 |
12:57:39.40 |
-10:37:03.4 |
HIP 63202 |
18.91 |
| 2026-06-14 12:00 |
12:57:34.40 |
-10:37:06.8 |
HIP 63202 |
18.22 |
| 2026-06-15 00:00 |
12:57:29.53 |
-10:37:10.8 |
HIP 63202 |
17.60 |
| 2026-06-15 12:00 |
12:57:24.81 |
-10:37:15.6 |
HIP 63202 |
17.05 |
| 2026-06-16 00:00 |
12:57:20.23 |
-10:37:21.1 |
HIP 63202 |
16.56 |
| 2026-06-16 12:00 |
12:57:15.79 |
-10:37:27.2 |
HIP 63202 |
16.13 |
| 2026-06-17 00:00 |
12:57:11.49 |
-10:37:34.1 |
HIP 63202 |
15.76 |
| 2026-06-17 12:00 |
12:57:07.33 |
-10:37:41.7 |
HIP 63202 |
15.45 |
| 2026-06-18 00:00 |
12:57:03.31 |
-10:37:50.0 |
HIP 63202 |
15.20 |
| 2026-06-18 12:00 |
12:56:59.43 |
-10:37:58.9 |
HIP 63202 |
15.00 |
| 2026-06-19 00:00 |
12:56:55.69 |
-10:38:08.6 |
HIP 63202 |
14.84 |
| 2026-06-19 12:00 |
12:56:52.10 |
-10:38:19.0 |
HIP 63202 |
14.73 |
| 2026-06-20 00:00 |
12:56:48.64 |
-10:38:30.1 |
HIP 63202 |
14.65 |
| 2026-06-20 12:00 |
12:56:45.32 |
-10:38:41.9 |
HIP 63202 |
14.60 |
| 2026-06-21 00:00 |
12:56:42.14 |
-10:38:54.4 |
HIP 63202 |
14.59 |
| 2026-06-21 12:00 |
12:56:39.09 |
-10:39:07.6 |
HIP 63202 |
14.60 |
| 2026-06-22 00:00 |
12:56:36.19 |
-10:39:21.5 |
HIP 63202 |
14.62 |