343P/NEAT-LONEOS
| Parameter |
Value |
| Designation |
343P/NEAT-LONEOS |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2017-01-27T05:13:16.026240Z |
| Orbit solution date (soln_date, UTC) |
2024-08-11T00:12:24Z |
| Obs used |
324 |
| NEO |
- |
| M1 |
5.600 |
| K1 |
29.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2013-10-15.0000000 |
| e |
0.58417160 |
| q (au) |
2.276535 |
| a (au) |
5.474699 |
| i (deg) |
5.584452 |
| Ω (om, deg) |
257.265816 |
| ω (w, deg) |
137.584514 |
| M (ma, deg) |
267.652804 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.056 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.056 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| k |
1.000 |
| 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 |
| 2016-06-11 |
2017-01-23 |
+9.4520 |
-3.557 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-02-03 00:00 |
16:22:47.18 |
-23:04:28.6 |
HIP 80238 |
2.85 |
| 2026-02-03 12:00 |
16:22:58.09 |
-23:04:53.5 |
HIP 80238 |
2.66 |
| 2026-02-04 00:00 |
16:23:08.90 |
-23:05:18.2 |
HIP 80238 |
4.34 |
| 2026-02-04 12:00 |
16:23:19.61 |
-23:05:42.6 |
HIP 80238 |
6.55 |
| 2026-02-05 00:00 |
16:23:30.21 |
-23:06:06.7 |
HIP 80238 |
8.89 |
| 2026-02-05 12:00 |
16:23:40.70 |
-23:06:30.5 |
HIP 80238 |
11.26 |
| 2026-02-06 00:00 |
16:23:51.09 |
-23:06:54.1 |
HIP 80238 |
13.64 |
| 2026-02-06 12:00 |
16:24:01.37 |
-23:07:17.4 |
HIP 80238 |
16.00 |
| 2026-02-07 00:00 |
16:24:11.54 |
-23:07:40.5 |
HIP 80238 |
18.35 |
| 2026-02-07 12:00 |
16:24:21.60 |
-23:08:03.2 |
HIP 80238 |
20.67 |
| 2026-02-08 00:00 |
16:24:31.55 |
-23:08:25.7 |
HIP 80474 |
21.57 |
| 2026-02-08 12:00 |
16:24:41.39 |
-23:08:48.0 |
HIP 80474 |
19.81 |
| 2026-02-09 00:00 |
16:24:51.12 |
-23:09:09.9 |
HIP 80474 |
18.20 |
| 2026-02-09 12:00 |
16:25:00.73 |
-23:09:31.6 |
HIP 80474 |
16.76 |
| 2026-02-10 00:00 |
16:25:10.23 |
-23:09:53.0 |
HIP 80474 |
15.51 |
| 2026-02-10 12:00 |
16:25:19.62 |
-23:10:14.1 |
HIP 80474 |
14.51 |
| 2026-02-11 00:00 |
16:25:28.89 |
-23:10:34.9 |
HIP 80474 |
13.80 |
| 2026-02-11 12:00 |
16:25:38.05 |
-23:10:55.5 |
HIP 80474 |
13.40 |
| 2026-02-12 00:00 |
16:25:47.09 |
-23:11:15.8 |
HIP 80474 |
13.33 |
| 2026-02-12 12:00 |
16:25:56.01 |
-23:11:35.8 |
HIP 80474 |
13.59 |
| 2026-02-13 00:00 |
16:26:04.82 |
-23:11:55.5 |
HIP 80474 |
14.14 |
| 2026-02-13 12:00 |
16:26:13.51 |
-23:12:15.0 |
HIP 80474 |
14.94 |
| 2026-02-14 00:00 |
16:26:22.07 |
-23:12:34.2 |
HIP 80474 |
15.94 |
| 2026-02-14 12:00 |
16:26:30.52 |
-23:12:53.0 |
HIP 80474 |
17.10 |
| 2026-02-15 00:00 |
16:26:38.84 |
-23:13:11.6 |
HIP 80474 |
18.38 |
| 2026-02-15 12:00 |
16:26:47.05 |
-23:13:29.9 |
HIP 80474 |
19.74 |
| 2026-02-16 00:00 |
16:26:55.13 |
-23:13:48.0 |
HIP 80474 |
21.17 |
| 2026-02-16 12:00 |
16:27:03.09 |
-23:14:05.7 |
HIP 80474 |
22.64 |
| 2026-02-17 00:00 |
16:27:10.92 |
-23:14:23.2 |
HIP 80474 |
24.13 |
| 2026-02-17 12:00 |
16:27:18.63 |
-23:14:40.3 |
HIP 80474 |
25.65 |
| 2026-02-18 00:00 |
16:27:26.21 |
-23:14:57.2 |
HIP 80474 |
27.17 |
| 2026-02-18 12:00 |
16:27:33.67 |
-23:15:13.8 |
HIP 80474 |
28.70 |
| 2026-02-19 00:00 |
16:27:41.00 |
-23:15:30.1 |
HIP 80474 |
30.22 |
| 2026-02-19 12:00 |
16:27:48.21 |
-23:15:46.1 |
HIP 80474 |
31.73 |
| 2026-02-20 00:00 |
16:27:55.28 |
-23:16:01.9 |
HIP 80474 |
33.23 |
| 2026-02-20 12:00 |
16:28:02.23 |
-23:16:17.3 |
HIP 80474 |
34.72 |
| 2026-02-21 00:00 |
16:28:09.05 |
-23:16:32.4 |
HIP 80474 |
36.18 |
| 2026-02-21 12:00 |
16:28:15.74 |
-23:16:47.3 |
HIP 80474 |
37.63 |
| 2026-02-22 00:00 |
16:28:22.30 |
-23:17:01.9 |
HIP 80474 |
39.06 |
| 2026-02-22 12:00 |
16:28:28.73 |
-23:17:16.1 |
HIP 80474 |
40.47 |
| 2026-02-23 00:00 |
16:28:35.02 |
-23:17:30.1 |
HIP 80474 |
41.86 |
| 2026-02-23 12:00 |
16:28:41.19 |
-23:17:43.8 |
HIP 80474 |
43.22 |
| 2026-02-24 00:00 |
16:28:47.22 |
-23:17:57.2 |
HIP 80632 |
44.19 |