| Parameter |
Value |
| Designation |
312P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2020-09-24T19:35:29.054400Z |
| Orbit solution date (soln_date, UTC) |
2025-04-09T13:44:31Z |
| Obs used |
161 |
| NEO |
- |
| M1 |
16.900 |
| K1 |
7.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2017-08-05.0000000 |
| e |
0.43012991 |
| q (au) |
1.971316 |
| a (au) |
3.459237 |
| i (deg) |
19.791956 |
| Ω (om, deg) |
144.887861 |
| ω (w, deg) |
207.686469 |
| M (ma, deg) |
184.317953 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.152 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.152 |
| n |
6.000 |
| gf |
0.997 |
| gb |
-0.890 |
| 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 |
17:36:07.15 |
-10:38:26.8 |
HIP 86313 |
34.59 |
| 2026-09-20 12:00 |
17:36:38.55 |
-10:43:22.9 |
HIP 86313 |
25.45 |
| 2026-09-21 00:00 |
17:37:10.28 |
-10:48:17.8 |
HIP 86313 |
16.26 |
| 2026-09-21 12:00 |
17:37:42.34 |
-10:53:11.7 |
HIP 86313 |
7.08 |
| 2026-09-22 00:00 |
17:38:14.72 |
-10:58:04.4 |
HIP 86313 |
2.81 |
| 2026-09-22 12:00 |
17:38:47.41 |
-11:02:56.0 |
HIP 86370 |
9.93 |
| 2026-09-23 00:00 |
17:39:20.43 |
-11:07:46.4 |
HIP 86416 |
8.46 |
| 2026-09-23 12:00 |
17:39:53.77 |
-11:12:35.7 |
HIP 86416 |
7.16 |
| 2026-09-24 00:00 |
17:40:27.42 |
-11:17:23.8 |
HIP 86452 |
13.39 |
| 2026-09-24 12:00 |
17:41:01.38 |
-11:22:10.7 |
HIP 86452 |
17.52 |
| 2026-09-25 00:00 |
17:41:35.66 |
-11:26:56.4 |
HIP 86452 |
24.96 |
| 2026-09-25 12:00 |
17:42:10.25 |
-11:31:40.8 |
HIP 86452 |
33.61 |
| 2026-09-26 00:00 |
17:42:45.15 |
-11:36:24.1 |
HIP 86818 |
34.39 |
| 2026-09-26 12:00 |
17:43:20.36 |
-11:41:06.1 |
HIP 86818 |
25.20 |
| 2026-09-27 00:00 |
17:43:55.88 |
-11:45:46.9 |
HIP 86818 |
16.71 |
| 2026-09-27 12:00 |
17:44:31.70 |
-11:50:26.4 |
HIP 86818 |
10.92 |
| 2026-09-28 00:00 |
17:45:07.83 |
-11:55:04.6 |
HIP 86818 |
12.57 |
| 2026-09-28 12:00 |
17:45:44.25 |
-11:59:41.6 |
HIP 86818 |
19.97 |
| 2026-09-29 00:00 |
17:46:20.98 |
-12:04:17.3 |
HIP 86818 |
29.07 |
| 2026-09-29 12:00 |
17:46:58.01 |
-12:08:51.6 |
HIP 86818 |
38.72 |
| 2026-09-30 00:00 |
17:47:35.34 |
-12:13:24.7 |
HIP 87268 |
41.31 |
| 2026-09-30 12:00 |
17:48:12.96 |
-12:17:56.4 |
HIP 87268 |
31.20 |
| 2026-10-01 00:00 |
17:48:50.89 |
-12:22:26.8 |
HIP 87268 |
21.16 |
| 2026-10-01 12:00 |
17:49:29.10 |
-12:26:55.8 |
HIP 87268 |
11.58 |
| 2026-10-02 00:00 |
17:50:07.62 |
-12:31:23.5 |
HIP 87268 |
5.95 |
| 2026-10-02 12:00 |
17:50:46.42 |
-12:35:49.8 |
HIP 87268 |
12.44 |
| 2026-10-03 00:00 |
17:51:25.52 |
-12:40:14.7 |
HIP 87402 |
12.24 |
| 2026-10-03 12:00 |
17:52:04.90 |
-12:44:38.3 |
HIP 87402 |
17.10 |
| 2026-10-04 00:00 |
17:52:44.58 |
-12:49:00.4 |
HIP 87402 |
25.68 |
| 2026-10-04 12:00 |
17:53:24.55 |
-12:53:21.1 |
HIP 87402 |
35.42 |
| 2026-10-05 00:00 |
17:54:04.80 |
-12:57:40.4 |
HIP 87544 |
43.82 |
| 2026-10-05 12:00 |
17:54:45.34 |
-13:01:58.2 |
HIP 87544 |
44.35 |
| 2026-10-06 00:00 |
17:55:26.16 |
-13:06:14.6 |
HIP 87879 |
41.08 |
| 2026-10-06 12:00 |
17:56:07.27 |
-13:10:29.5 |
HIP 87879 |
32.17 |
| 2026-10-07 00:00 |
17:56:48.66 |
-13:14:42.9 |
HIP 87879 |
24.88 |
| 2026-10-07 12:00 |
17:57:30.33 |
-13:18:54.8 |
HIP 87879 |
21.05 |
| 2026-10-08 00:00 |
17:58:12.28 |
-13:23:05.3 |
HIP 88010 |
18.52 |
| 2026-10-08 12:00 |
17:58:54.51 |
-13:27:14.2 |
HIP 88010 |
21.86 |
| 2026-10-09 00:00 |
17:59:37.02 |
-13:31:21.6 |
HIP 88201 |
22.37 |
| 2026-10-09 12:00 |
18:00:19.80 |
-13:35:27.4 |
HIP 88201 |
12.74 |
| 2026-10-10 00:00 |
18:01:02.86 |
-13:39:31.7 |
HIP 88201 |
8.66 |
| 2026-10-10 12:00 |
18:01:46.19 |
-13:43:34.5 |
HIP 88201 |
15.54 |
| 2026-10-11 00:00 |
18:02:29.79 |
-13:47:35.7 |
HIP 88201 |
25.80 |