| 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) |
| 2026-03-26 00:00 |
17:55:22.41 |
-02:29:42.8 |
HIP 87779 |
18.31 |
| 2026-03-26 12:00 |
17:55:41.99 |
-02:27:11.4 |
HIP 87779 |
19.36 |
| 2026-03-27 00:00 |
17:56:01.35 |
-02:24:39.2 |
HIP 87779 |
21.80 |
| 2026-03-27 12:00 |
17:56:20.48 |
-02:22:06.4 |
HIP 87779 |
25.20 |
| 2026-03-28 00:00 |
17:56:39.38 |
-02:19:32.8 |
HIP 87972 |
25.08 |
| 2026-03-28 12:00 |
17:56:58.06 |
-02:16:58.5 |
HIP 87972 |
19.77 |
| 2026-03-29 00:00 |
17:57:16.50 |
-02:14:23.5 |
HIP 87972 |
14.53 |
| 2026-03-29 12:00 |
17:57:34.71 |
-02:11:47.8 |
HIP 87972 |
9.39 |
| 2026-03-30 00:00 |
17:57:52.69 |
-02:09:11.5 |
HIP 87972 |
4.53 |
| 2026-03-30 12:00 |
17:58:10.43 |
-02:06:34.5 |
HIP 87972 |
2.62 |
| 2026-03-31 00:00 |
17:58:27.93 |
-02:03:56.9 |
HIP 87972 |
6.77 |
| 2026-03-31 12:00 |
17:58:45.20 |
-02:01:18.6 |
HIP 87972 |
11.66 |
| 2026-04-01 00:00 |
17:59:02.22 |
-01:58:39.7 |
HIP 87972 |
16.61 |
| 2026-04-01 12:00 |
17:59:19.01 |
-01:56:00.1 |
HIP 87972 |
21.55 |
| 2026-04-02 00:00 |
17:59:35.55 |
-01:53:20.0 |
HIP 88223 |
22.56 |
| 2026-04-02 12:00 |
17:59:51.84 |
-01:50:39.3 |
HIP 88223 |
20.25 |
| 2026-04-03 00:00 |
18:00:07.88 |
-01:47:58.0 |
HIP 88223 |
19.00 |
| 2026-04-03 12:00 |
18:00:23.68 |
-01:45:16.1 |
HIP 88223 |
18.96 |
| 2026-04-04 00:00 |
18:00:39.23 |
-01:42:33.7 |
HIP 88223 |
20.12 |
| 2026-04-04 12:00 |
18:00:54.52 |
-01:39:50.8 |
HIP 88223 |
22.26 |
| 2026-04-05 00:00 |
18:01:09.56 |
-01:37:07.3 |
HIP 88223 |
25.11 |
| 2026-04-05 12:00 |
18:01:24.34 |
-01:34:23.4 |
HIP 88377 |
21.80 |
| 2026-04-06 00:00 |
18:01:38.87 |
-01:31:38.9 |
HIP 88377 |
17.73 |
| 2026-04-06 12:00 |
18:01:53.13 |
-01:28:53.9 |
HIP 88377 |
14.02 |
| 2026-04-07 00:00 |
18:02:07.14 |
-01:26:08.5 |
HIP 88377 |
10.98 |
| 2026-04-07 12:00 |
18:02:20.87 |
-01:23:22.7 |
HIP 88376 |
7.37 |
| 2026-04-08 00:00 |
18:02:34.35 |
-01:20:36.4 |
HIP 88376 |
3.30 |
| 2026-04-08 12:00 |
18:02:47.56 |
-01:17:49.7 |
HIP 88376 |
2.35 |
| 2026-04-09 00:00 |
18:03:00.49 |
-01:15:02.5 |
HIP 88376 |
6.08 |
| 2026-04-09 12:00 |
18:03:13.16 |
-01:12:15.1 |
HIP 88376 |
10.21 |
| 2026-04-10 00:00 |
18:03:25.55 |
-01:09:27.2 |
HIP 88376 |
14.34 |
| 2026-04-10 12:00 |
18:03:37.67 |
-01:06:39.0 |
HIP 88376 |
18.46 |
| 2026-04-11 00:00 |
18:03:49.52 |
-01:03:50.5 |
HIP 88376 |
22.53 |
| 2026-04-11 12:00 |
18:04:01.08 |
-01:01:01.6 |
HIP 88376 |
26.56 |
| 2026-04-12 00:00 |
18:04:12.37 |
-00:58:12.5 |
HIP 88376 |
30.55 |
| 2026-04-12 12:00 |
18:04:23.37 |
-00:55:23.1 |
HIP 88698 |
33.84 |
| 2026-04-13 00:00 |
18:04:34.09 |
-00:52:33.4 |
HIP 88698 |
32.75 |
| 2026-04-13 12:00 |
18:04:44.52 |
-00:49:43.5 |
HIP 88671 |
30.93 |
| 2026-04-14 00:00 |
18:04:54.67 |
-00:46:53.4 |
HIP 88671 |
27.13 |
| 2026-04-14 12:00 |
18:05:04.52 |
-00:44:03.1 |
HIP 88671 |
23.37 |
| 2026-04-15 00:00 |
18:05:14.09 |
-00:41:12.6 |
HIP 88671 |
19.66 |
| 2026-04-15 12:00 |
18:05:23.37 |
-00:38:22.0 |
HIP 88671 |
16.00 |
| 2026-04-16 00:00 |
18:05:32.35 |
-00:35:31.2 |
HIP 88671 |
12.39 |