| Parameter |
Value |
| Designation |
334P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-05-19T03:35:22.182720Z |
| Orbit solution date (soln_date, UTC) |
2023-05-03T22:44:41Z |
| Obs used |
404 |
| NEO |
- |
| M1 |
6.500 |
| K1 |
15.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-10-20.0000000 |
| e |
0.35453120 |
| q (au) |
4.187661 |
| a (au) |
6.487782 |
| i (deg) |
19.057080 |
| Ω (om, deg) |
92.783588 |
| ω (w, deg) |
81.094516 |
| M (ma, deg) |
216.668886 |
Magnitude
Scatter + Global Linear
$$
M_a = (6.001 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
6.001 |
| n |
6.000 |
| gf |
0.912 |
| gb |
-0.905 |
| k |
1.000 |
| δ90 |
6.338 |
| 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 |
| 2016-01-07 |
2017-05-18 |
+13.7133 |
-8.333 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
00:57:52.45 |
-18:31:34.2 |
HIP 4418 |
27.10 |
| 2026-09-20 12:00 |
00:57:42.86 |
-18:32:47.1 |
HIP 4418 |
24.70 |
| 2026-09-21 00:00 |
00:57:33.22 |
-18:33:59.4 |
HIP 4418 |
22.34 |
| 2026-09-21 12:00 |
00:57:23.55 |
-18:35:11.2 |
HIP 4418 |
20.04 |
| 2026-09-22 00:00 |
00:57:13.84 |
-18:36:22.4 |
HIP 4418 |
17.83 |
| 2026-09-22 12:00 |
00:57:04.09 |
-18:37:33.1 |
HIP 4418 |
15.73 |
| 2026-09-23 00:00 |
00:56:54.30 |
-18:38:43.1 |
HIP 4418 |
13.81 |
| 2026-09-23 12:00 |
00:56:44.48 |
-18:39:52.7 |
HIP 4418 |
12.15 |
| 2026-09-24 00:00 |
00:56:34.62 |
-18:41:01.6 |
HIP 4418 |
10.88 |
| 2026-09-24 12:00 |
00:56:24.73 |
-18:42:09.9 |
HIP 4362 |
8.30 |
| 2026-09-25 00:00 |
00:56:14.80 |
-18:43:17.6 |
HIP 4362 |
5.69 |
| 2026-09-25 12:00 |
00:56:04.85 |
-18:44:24.7 |
HIP 4362 |
3.08 |
| 2026-09-26 00:00 |
00:55:54.86 |
-18:45:31.2 |
HIP 4362 |
0.49 |
| 2026-09-26 12:00 |
00:55:44.85 |
-18:46:37.0 |
HIP 4362 |
2.15 |
| 2026-09-27 00:00 |
00:55:34.81 |
-18:47:42.2 |
HIP 4362 |
4.76 |
| 2026-09-27 12:00 |
00:55:24.75 |
-18:48:46.8 |
HIP 4362 |
7.37 |
| 2026-09-28 00:00 |
00:55:14.65 |
-18:49:50.6 |
HIP 4362 |
9.98 |
| 2026-09-28 12:00 |
00:55:04.54 |
-18:50:53.9 |
HIP 4362 |
12.60 |
| 2026-09-29 00:00 |
00:54:54.40 |
-18:51:56.4 |
HIP 4362 |
15.22 |
| 2026-09-29 12:00 |
00:54:44.24 |
-18:52:58.3 |
HIP 4362 |
17.83 |
| 2026-09-30 00:00 |
00:54:34.06 |
-18:53:59.5 |
HIP 4362 |
20.45 |
| 2026-09-30 12:00 |
00:54:23.86 |
-18:55:00.0 |
HIP 4362 |
23.06 |
| 2026-10-01 00:00 |
00:54:13.64 |
-18:55:59.7 |
HIP 4362 |
25.67 |
| 2026-10-01 12:00 |
00:54:03.41 |
-18:56:58.8 |
HIP 4362 |
28.28 |
| 2026-10-02 00:00 |
00:53:53.16 |
-18:57:57.1 |
HIP 4117 |
28.27 |
| 2026-10-02 12:00 |
00:53:42.90 |
-18:58:54.7 |
HIP 4117 |
27.81 |
| 2026-10-03 00:00 |
00:53:32.62 |
-18:59:51.6 |
HIP 4117 |
27.58 |
| 2026-10-03 12:00 |
00:53:22.34 |
-19:00:47.7 |
HIP 4117 |
27.58 |
| 2026-10-04 00:00 |
00:53:12.04 |
-19:01:43.1 |
HIP 4117 |
27.82 |
| 2026-10-04 12:00 |
00:53:01.73 |
-19:02:37.7 |
HIP 4063 |
26.61 |
| 2026-10-05 00:00 |
00:52:51.42 |
-19:03:31.5 |
HIP 4063 |
24.63 |
| 2026-10-05 12:00 |
00:52:41.10 |
-19:04:24.6 |
HIP 4063 |
22.79 |
| 2026-10-06 00:00 |
00:52:30.78 |
-19:05:16.8 |
HIP 4063 |
21.12 |
| 2026-10-06 12:00 |
00:52:20.45 |
-19:06:08.3 |
HIP 4063 |
19.66 |
| 2026-10-07 00:00 |
00:52:10.12 |
-19:06:59.0 |
HIP 4063 |
18.46 |
| 2026-10-07 12:00 |
00:51:59.79 |
-19:07:48.8 |
HIP 4063 |
17.58 |
| 2026-10-08 00:00 |
00:51:49.46 |
-19:08:37.8 |
HIP 4063 |
17.06 |
| 2026-10-08 12:00 |
00:51:39.13 |
-19:09:26.0 |
HIP 4063 |
16.93 |
| 2026-10-09 00:00 |
00:51:28.80 |
-19:10:13.4 |
HIP 4063 |
17.19 |
| 2026-10-09 12:00 |
00:51:18.48 |
-19:11:00.0 |
HIP 4063 |
17.84 |
| 2026-10-10 00:00 |
00:51:08.17 |
-19:11:45.6 |
HIP 4063 |
18.82 |
| 2026-10-10 12:00 |
00:50:57.86 |
-19:12:30.5 |
HIP 4063 |
20.09 |
| 2026-10-11 00:00 |
00:50:47.57 |
-19:13:14.4 |
HIP 4063 |
21.59 |