| 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) |
| 2026-05-12 00:00 |
16:16:35.78 |
-22:46:47.5 |
HIP 79676 |
12.47 |
| 2026-05-12 12:00 |
16:16:22.10 |
-22:46:09.1 |
HIP 79676 |
9.49 |
| 2026-05-13 00:00 |
16:16:08.36 |
-22:45:30.5 |
HIP 79676 |
6.72 |
| 2026-05-13 12:00 |
16:15:54.58 |
-22:44:51.6 |
HIP 79676 |
4.60 |
| 2026-05-14 00:00 |
16:15:40.73 |
-22:44:12.4 |
HIP 79676 |
4.27 |
| 2026-05-14 12:00 |
16:15:26.84 |
-22:43:33.0 |
HIP 79676 |
6.06 |
| 2026-05-15 00:00 |
16:15:12.90 |
-22:42:53.3 |
HIP 79676 |
8.76 |
| 2026-05-15 12:00 |
16:14:58.92 |
-22:42:13.3 |
HIP 79676 |
11.77 |
| 2026-05-16 00:00 |
16:14:44.88 |
-22:41:33.1 |
HIP 79676 |
14.91 |
| 2026-05-16 12:00 |
16:14:30.81 |
-22:40:52.6 |
HIP 79676 |
18.12 |
| 2026-05-17 00:00 |
16:14:16.69 |
-22:40:11.9 |
HIP 79476 |
18.68 |
| 2026-05-17 12:00 |
16:14:02.54 |
-22:39:30.9 |
HIP 79476 |
15.70 |
| 2026-05-18 00:00 |
16:13:48.35 |
-22:38:49.7 |
HIP 79476 |
12.90 |
| 2026-05-18 12:00 |
16:13:34.12 |
-22:38:08.2 |
HIP 79476 |
10.42 |
| 2026-05-19 00:00 |
16:13:19.86 |
-22:37:26.6 |
HIP 79476 |
8.55 |
| 2026-05-19 12:00 |
16:13:05.57 |
-22:36:44.7 |
HIP 79476 |
7.76 |
| 2026-05-20 00:00 |
16:12:51.26 |
-22:36:02.6 |
HIP 79476 |
8.38 |
| 2026-05-20 12:00 |
16:12:36.91 |
-22:35:20.2 |
HIP 79476 |
10.15 |
| 2026-05-21 00:00 |
16:12:22.54 |
-22:34:37.7 |
HIP 79366 |
7.16 |
| 2026-05-21 12:00 |
16:12:08.15 |
-22:33:54.9 |
HIP 79366 |
3.78 |
| 2026-05-22 00:00 |
16:11:53.73 |
-22:33:12.0 |
HIP 79366 |
0.56 |
| 2026-05-22 12:00 |
16:11:39.30 |
-22:32:28.8 |
HIP 79366 |
3.09 |
| 2026-05-23 00:00 |
16:11:24.85 |
-22:31:45.5 |
HIP 79366 |
6.49 |
| 2026-05-23 12:00 |
16:11:10.39 |
-22:31:01.9 |
HIP 79366 |
9.90 |
| 2026-05-24 00:00 |
16:10:55.91 |
-22:30:18.2 |
HIP 79366 |
13.32 |
| 2026-05-24 12:00 |
16:10:41.42 |
-22:29:34.3 |
HIP 79252 |
16.04 |
| 2026-05-25 00:00 |
16:10:26.93 |
-22:28:50.3 |
HIP 79252 |
15.05 |
| 2026-05-25 12:00 |
16:10:12.42 |
-22:28:06.0 |
HIP 79252 |
14.81 |
| 2026-05-26 00:00 |
16:09:57.91 |
-22:27:21.6 |
HIP 79252 |
15.34 |
| 2026-05-26 12:00 |
16:09:43.40 |
-22:26:37.1 |
HIP 79252 |
16.59 |
| 2026-05-27 00:00 |
16:09:28.88 |
-22:25:52.3 |
HIP 79252 |
18.40 |
| 2026-05-27 12:00 |
16:09:14.37 |
-22:25:07.5 |
HIP 79252 |
20.62 |
| 2026-05-28 00:00 |
16:08:59.86 |
-22:24:22.5 |
HIP 79252 |
23.15 |
| 2026-05-28 12:00 |
16:08:45.35 |
-22:23:37.3 |
HIP 79252 |
25.89 |
| 2026-05-29 00:00 |
16:08:30.85 |
-22:22:52.0 |
HIP 78977 |
25.63 |
| 2026-05-29 12:00 |
16:08:16.35 |
-22:22:06.6 |
HIP 78977 |
22.94 |
| 2026-05-30 00:00 |
16:08:01.87 |
-22:21:21.1 |
HIP 78977 |
20.47 |
| 2026-05-30 12:00 |
16:07:47.39 |
-22:20:35.4 |
HIP 78977 |
18.31 |
| 2026-05-31 00:00 |
16:07:32.93 |
-22:19:49.7 |
HIP 78977 |
16.60 |
| 2026-05-31 12:00 |
16:07:18.48 |
-22:19:03.8 |
HIP 78977 |
15.46 |
| 2026-06-01 00:00 |
16:07:04.06 |
-22:18:17.8 |
HIP 78977 |
15.03 |
| 2026-06-01 12:00 |
16:06:49.64 |
-22:17:31.7 |
HIP 78977 |
15.37 |
| 2026-06-02 00:00 |
16:06:35.25 |
-22:16:45.6 |
HIP 78977 |
16.43 |