| Parameter |
Value |
| Designation |
215P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-10-03T07:31:01.663680Z |
| Orbit solution date (soln_date, UTC) |
2026-09-04T08:42:17Z |
| Obs used |
1058 |
| NEO |
- |
| M1 |
8.800 |
| K1 |
12.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-01-27.0000000 |
| e |
0.19497265 |
| q (au) |
3.500152 |
| a (au) |
4.347867 |
| i (deg) |
10.059260 |
| Ω (om, deg) |
61.163513 |
| ω (w, deg) |
255.414293 |
| M (ma, deg) |
213.744222 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.686 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.686 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.793 |
| k |
0.800 |
| 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 |
13:45:20.44 |
-07:07:20.4 |
HIP 67082 |
31.27 |
| 2026-09-20 12:00 |
13:45:47.50 |
-07:10:32.6 |
HIP 67082 |
30.24 |
| 2026-09-21 00:00 |
13:46:14.62 |
-07:13:44.9 |
HIP 67082 |
31.02 |
| 2026-09-21 12:00 |
13:46:41.81 |
-07:16:57.1 |
HIP 67082 |
33.50 |
| 2026-09-22 00:00 |
13:47:09.07 |
-07:20:09.5 |
HIP 67433 |
30.85 |
| 2026-09-22 12:00 |
13:47:36.39 |
-07:23:21.8 |
HIP 67433 |
24.47 |
| 2026-09-23 00:00 |
13:48:03.77 |
-07:26:34.2 |
HIP 67433 |
18.92 |
| 2026-09-23 12:00 |
13:48:31.22 |
-07:29:46.5 |
HIP 67433 |
15.16 |
| 2026-09-24 00:00 |
13:48:58.73 |
-07:32:58.9 |
HIP 67433 |
14.65 |
| 2026-09-24 12:00 |
13:49:26.31 |
-07:36:11.3 |
HIP 67553 |
16.41 |
| 2026-09-25 00:00 |
13:49:53.95 |
-07:39:23.7 |
HIP 67553 |
10.18 |
| 2026-09-25 12:00 |
13:50:21.65 |
-07:42:36.1 |
HIP 67553 |
7.21 |
| 2026-09-26 00:00 |
13:50:49.41 |
-07:45:48.6 |
HIP 67578 |
1.29 |
| 2026-09-26 12:00 |
13:51:17.24 |
-07:49:01.0 |
HIP 67578 |
6.83 |
| 2026-09-27 00:00 |
13:51:45.12 |
-07:52:13.4 |
HIP 67718 |
8.89 |
| 2026-09-27 12:00 |
13:52:13.06 |
-07:55:25.7 |
HIP 67718 |
3.96 |
| 2026-09-28 00:00 |
13:52:41.07 |
-07:58:38.1 |
HIP 67718 |
8.29 |
| 2026-09-28 12:00 |
13:53:09.13 |
-08:01:50.4 |
HIP 67718 |
15.46 |
| 2026-09-29 00:00 |
13:53:37.26 |
-08:05:02.8 |
HIP 67953 |
20.12 |
| 2026-09-29 12:00 |
13:54:05.44 |
-08:08:15.1 |
HIP 67953 |
13.91 |
| 2026-09-30 00:00 |
13:54:33.68 |
-08:11:27.3 |
HIP 67953 |
10.00 |
| 2026-09-30 12:00 |
13:55:01.98 |
-08:14:39.6 |
HIP 67953 |
11.17 |
| 2026-10-01 00:00 |
13:55:30.33 |
-08:17:51.8 |
HIP 67953 |
16.38 |
| 2026-10-01 12:00 |
13:55:58.75 |
-08:21:03.9 |
HIP 67967 |
20.71 |
| 2026-10-02 00:00 |
13:56:27.21 |
-08:24:16.1 |
HIP 67967 |
23.76 |
| 2026-10-02 12:00 |
13:56:55.74 |
-08:27:28.1 |
HIP 67967 |
28.63 |
| 2026-10-03 00:00 |
13:57:24.32 |
-08:30:40.1 |
HIP 67967 |
34.59 |
| 2026-10-03 12:00 |
13:57:52.96 |
-08:33:52.1 |
HIP 68241 |
29.70 |
| 2026-10-04 00:00 |
13:58:21.65 |
-08:37:04.0 |
HIP 68241 |
26.20 |
| 2026-10-04 12:00 |
13:58:50.39 |
-08:40:15.8 |
HIP 68241 |
24.73 |
| 2026-10-05 00:00 |
13:59:19.19 |
-08:43:27.6 |
HIP 68241 |
25.66 |
| 2026-10-05 12:00 |
13:59:48.04 |
-08:46:39.3 |
HIP 68430 |
27.97 |
| 2026-10-06 00:00 |
14:00:16.95 |
-08:49:50.9 |
HIP 68430 |
29.16 |
| 2026-10-06 12:00 |
14:00:45.91 |
-08:53:02.5 |
HIP 68430 |
32.27 |
| 2026-10-07 00:00 |
14:01:14.92 |
-08:56:13.9 |
HIP 68430 |
36.81 |
| 2026-10-07 12:00 |
14:01:43.98 |
-08:59:25.3 |
HIP 68638 |
36.38 |
| 2026-10-08 00:00 |
14:02:13.09 |
-09:02:36.6 |
HIP 68638 |
30.27 |
| 2026-10-08 12:00 |
14:02:42.25 |
-09:05:47.7 |
HIP 68638 |
25.16 |
| 2026-10-09 00:00 |
14:03:11.46 |
-09:08:58.8 |
HIP 68752 |
18.46 |
| 2026-10-09 12:00 |
14:03:40.71 |
-09:12:09.7 |
HIP 68752 |
10.59 |
| 2026-10-10 00:00 |
14:04:10.02 |
-09:15:20.6 |
HIP 68752 |
2.83 |
| 2026-10-10 12:00 |
14:04:39.37 |
-09:18:31.3 |
HIP 68752 |
5.37 |
| 2026-10-11 00:00 |
14:05:08.78 |
-09:21:41.9 |
HIP 68752 |
13.23 |