| Parameter |
Value |
| Designation |
243P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2011-03-02T15:59:57.350400Z |
| Orbit solution date (soln_date, UTC) |
2026-08-25T08:42:12Z |
| Obs used |
828 |
| NEO |
- |
| M1 |
9.400 |
| K1 |
18.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2012-04-03.0000000 |
| e |
0.35910310 |
| q (au) |
2.455125 |
| a (au) |
3.830764 |
| i (deg) |
7.639688 |
| Ω (om, deg) |
87.672944 |
| ω (w, deg) |
283.765338 |
| M (ma, deg) |
52.231322 |
Magnitude
Scatter + Global Linear
$$
M_a = (10.910 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
10.910 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.855 |
| k |
0.999 |
| 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
Finding Chart
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
05:57:26.79 |
+20:45:23.0 |
HIP 28169 |
13.98 |
| 2026-09-20 12:00 |
05:57:54.29 |
+20:45:56.1 |
HIP 28308 |
15.25 |
| 2026-09-21 00:00 |
05:58:21.52 |
+20:46:29.0 |
HIP 28308 |
9.87 |
| 2026-09-21 12:00 |
05:58:48.47 |
+20:47:01.7 |
HIP 28308 |
6.64 |
| 2026-09-22 00:00 |
05:59:15.13 |
+20:47:34.3 |
HIP 28308 |
8.38 |
| 2026-09-22 12:00 |
05:59:41.52 |
+20:48:06.8 |
HIP 28308 |
13.16 |
| 2026-09-23 00:00 |
06:00:07.62 |
+20:48:39.2 |
HIP 28494 |
16.66 |
| 2026-09-23 12:00 |
06:00:33.43 |
+20:49:11.4 |
HIP 28494 |
13.04 |
| 2026-09-24 00:00 |
06:00:58.96 |
+20:49:43.5 |
HIP 28494 |
11.64 |
| 2026-09-24 12:00 |
06:01:24.19 |
+20:50:15.6 |
HIP 28494 |
13.11 |
| 2026-09-25 00:00 |
06:01:49.14 |
+20:50:47.5 |
HIP 28494 |
16.63 |
| 2026-09-25 12:00 |
06:02:13.79 |
+20:51:19.4 |
HIP 28555 |
18.69 |
| 2026-09-26 00:00 |
06:02:38.14 |
+20:51:51.2 |
HIP 28659 |
17.99 |
| 2026-09-26 12:00 |
06:03:02.20 |
+20:52:23.0 |
HIP 28659 |
17.24 |
| 2026-09-27 00:00 |
06:03:25.96 |
+20:52:54.7 |
HIP 28659 |
18.28 |
| 2026-09-27 12:00 |
06:03:49.41 |
+20:53:26.4 |
HIP 28659 |
20.78 |
| 2026-09-28 00:00 |
06:04:12.57 |
+20:53:58.1 |
HIP 28659 |
24.25 |
| 2026-09-28 12:00 |
06:04:35.42 |
+20:54:29.8 |
HIP 28659 |
28.29 |
| 2026-09-29 00:00 |
06:04:57.96 |
+20:55:01.5 |
HIP 28965 |
27.17 |
| 2026-09-29 12:00 |
06:05:20.19 |
+20:55:33.2 |
HIP 28965 |
22.81 |
| 2026-09-30 00:00 |
06:05:42.11 |
+20:56:04.9 |
HIP 28965 |
18.95 |
| 2026-09-30 12:00 |
06:06:03.72 |
+20:56:36.6 |
HIP 28965 |
15.88 |
| 2026-10-01 00:00 |
06:06:25.02 |
+20:57:08.4 |
HIP 28965 |
14.05 |
| 2026-10-01 12:00 |
06:06:45.99 |
+20:57:40.2 |
HIP 29010 |
11.28 |
| 2026-10-02 00:00 |
06:07:06.64 |
+20:58:12.1 |
HIP 29010 |
9.37 |
| 2026-10-02 12:00 |
06:07:26.98 |
+20:58:44.1 |
HIP 29010 |
9.75 |
| 2026-10-03 00:00 |
06:07:46.99 |
+20:59:16.1 |
HIP 29010 |
12.13 |
| 2026-10-03 12:00 |
06:08:06.67 |
+20:59:48.3 |
HIP 29010 |
15.55 |
| 2026-10-04 00:00 |
06:08:26.02 |
+21:00:20.5 |
HIP 29077 |
18.23 |
| 2026-10-04 12:00 |
06:08:45.04 |
+21:00:52.9 |
HIP 29077 |
19.56 |
| 2026-10-05 00:00 |
06:09:03.73 |
+21:01:25.4 |
HIP 29077 |
21.68 |
| 2026-10-05 12:00 |
06:09:22.08 |
+21:01:58.1 |
HIP 29077 |
24.36 |
| 2026-10-06 00:00 |
06:09:40.09 |
+21:02:30.8 |
HIP 29367 |
25.42 |
| 2026-10-06 12:00 |
06:09:57.77 |
+21:03:03.8 |
HIP 29367 |
21.77 |
| 2026-10-07 00:00 |
06:10:15.10 |
+21:03:36.9 |
HIP 29367 |
18.41 |
| 2026-10-07 12:00 |
06:10:32.09 |
+21:04:10.2 |
HIP 29367 |
15.46 |
| 2026-10-08 00:00 |
06:10:48.73 |
+21:04:43.7 |
HIP 29367 |
13.15 |
| 2026-10-08 12:00 |
06:11:05.02 |
+21:05:17.4 |
HIP 29367 |
11.75 |
| 2026-10-09 00:00 |
06:11:20.97 |
+21:05:51.3 |
HIP 29367 |
11.54 |
| 2026-10-09 12:00 |
06:11:36.56 |
+21:06:25.4 |
HIP 29367 |
12.49 |
| 2026-10-10 00:00 |
06:11:51.80 |
+21:06:59.7 |
HIP 29367 |
14.32 |
| 2026-10-10 12:00 |
06:12:06.68 |
+21:07:34.3 |
HIP 29492 |
13.48 |
| 2026-10-11 00:00 |
06:12:21.21 |
+21:08:09.2 |
HIP 29492 |
10.53 |