| Parameter |
Value |
| Designation |
C/2001 M10 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2001-06-21T05:00:15.782400Z |
| Orbit solution date (soln_date, UTC) |
2026-06-18T16:12:18Z |
| Obs used |
96 |
| NEO |
- |
| M1 |
11.800 |
| K1 |
4.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2001-11-06.0000000 |
| e |
0.80109025 |
| q (au) |
5.302793 |
| a (au) |
26.659293 |
| i (deg) |
28.083417 |
| Ω (om, deg) |
293.917513 |
| ω (w, deg) |
5.478589 |
| M (ma, deg) |
0.986628 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.116 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.116 |
| n |
2.000 |
| gf |
0.981 |
| gb |
-0.951 |
| k |
1.000 |
| δ90 |
9.997 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-09-20 00:00 |
06:32:09.75 |
+32:54:31.7 |
HIP 31257 |
15.12 |
| 2026-09-20 12:00 |
06:32:10.75 |
+32:54:37.5 |
HIP 31257 |
14.90 |
| 2026-09-21 00:00 |
06:32:11.72 |
+32:54:43.3 |
HIP 31257 |
14.68 |
| 2026-09-21 12:00 |
06:32:12.65 |
+32:54:49.2 |
HIP 31257 |
14.47 |
| 2026-09-22 00:00 |
06:32:13.54 |
+32:54:55.1 |
HIP 31257 |
14.27 |
| 2026-09-22 12:00 |
06:32:14.41 |
+32:55:01.0 |
HIP 31257 |
14.08 |
| 2026-09-23 00:00 |
06:32:15.23 |
+32:55:07.0 |
HIP 31257 |
13.89 |
| 2026-09-23 12:00 |
06:32:16.03 |
+32:55:13.0 |
HIP 31257 |
13.71 |
| 2026-09-24 00:00 |
06:32:16.78 |
+32:55:19.1 |
HIP 31257 |
13.54 |
| 2026-09-24 12:00 |
06:32:17.51 |
+32:55:25.2 |
HIP 31257 |
13.38 |
| 2026-09-25 00:00 |
06:32:18.20 |
+32:55:31.3 |
HIP 31257 |
13.23 |
| 2026-09-25 12:00 |
06:32:18.85 |
+32:55:37.4 |
HIP 31257 |
13.08 |
| 2026-09-26 00:00 |
06:32:19.47 |
+32:55:43.6 |
HIP 31257 |
12.94 |
| 2026-09-26 12:00 |
06:32:20.05 |
+32:55:49.8 |
HIP 31257 |
12.81 |
| 2026-09-27 00:00 |
06:32:20.60 |
+32:55:56.1 |
HIP 31257 |
12.68 |
| 2026-09-27 12:00 |
06:32:21.12 |
+32:56:02.4 |
HIP 31257 |
12.57 |
| 2026-09-28 00:00 |
06:32:21.59 |
+32:56:08.7 |
HIP 31257 |
12.46 |
| 2026-09-28 12:00 |
06:32:22.04 |
+32:56:15.1 |
HIP 31257 |
12.36 |
| 2026-09-29 00:00 |
06:32:22.44 |
+32:56:21.4 |
HIP 31257 |
12.27 |
| 2026-09-29 12:00 |
06:32:22.82 |
+32:56:27.8 |
HIP 31257 |
12.18 |
| 2026-09-30 00:00 |
06:32:23.15 |
+32:56:34.3 |
HIP 31257 |
12.11 |
| 2026-09-30 12:00 |
06:32:23.46 |
+32:56:40.8 |
HIP 31257 |
12.04 |
| 2026-10-01 00:00 |
06:32:23.72 |
+32:56:47.2 |
HIP 31257 |
11.98 |
| 2026-10-01 12:00 |
06:32:23.95 |
+32:56:53.8 |
HIP 31257 |
11.93 |
| 2026-10-02 00:00 |
06:32:24.15 |
+32:57:00.3 |
HIP 31257 |
11.89 |
| 2026-10-02 12:00 |
06:32:24.31 |
+32:57:06.9 |
HIP 31257 |
11.86 |
| 2026-10-03 00:00 |
06:32:24.43 |
+32:57:13.5 |
HIP 31257 |
11.83 |
| 2026-10-03 12:00 |
06:32:24.52 |
+32:57:20.1 |
HIP 31257 |
11.82 |
| 2026-10-04 00:00 |
06:32:24.57 |
+32:57:26.8 |
HIP 31257 |
11.81 |
| 2026-10-04 12:00 |
06:32:24.59 |
+32:57:33.5 |
HIP 31257 |
11.81 |
| 2026-10-05 00:00 |
06:32:24.57 |
+32:57:40.2 |
HIP 31257 |
11.82 |
| 2026-10-05 12:00 |
06:32:24.52 |
+32:57:46.9 |
HIP 31257 |
11.84 |
| 2026-10-06 00:00 |
06:32:24.42 |
+32:57:53.6 |
HIP 31257 |
11.87 |
| 2026-10-06 12:00 |
06:32:24.30 |
+32:58:00.4 |
HIP 31257 |
11.90 |
| 2026-10-07 00:00 |
06:32:24.13 |
+32:58:07.2 |
HIP 31257 |
11.95 |
| 2026-10-07 12:00 |
06:32:23.93 |
+32:58:14.0 |
HIP 31257 |
12.00 |
| 2026-10-08 00:00 |
06:32:23.70 |
+32:58:20.8 |
HIP 31257 |
12.06 |
| 2026-10-08 12:00 |
06:32:23.43 |
+32:58:27.7 |
HIP 31257 |
12.13 |
| 2026-10-09 00:00 |
06:32:23.12 |
+32:58:34.6 |
HIP 31257 |
12.21 |
| 2026-10-09 12:00 |
06:32:22.78 |
+32:58:41.4 |
HIP 31257 |
12.29 |
| 2026-10-10 00:00 |
06:32:22.40 |
+32:58:48.4 |
HIP 31257 |
12.39 |
| 2026-10-10 12:00 |
06:32:21.98 |
+32:58:55.3 |
HIP 31257 |
12.49 |
| 2026-10-11 00:00 |
06:32:21.53 |
+32:59:02.2 |
HIP 31257 |
12.60 |