| Parameter |
Value |
| Designation |
215P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-09-29T11:32:34.831680Z |
| Orbit solution date (soln_date, UTC) |
2026-03-31T09:42:36Z |
| Obs used |
1026 |
| NEO |
- |
| M1 |
9.800 |
| K1 |
10.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2015-11-08.0000000 |
| e |
0.19768330 |
| q (au) |
3.480524 |
| a (au) |
4.338093 |
| i (deg) |
10.043528 |
| Ω (om, deg) |
62.130946 |
| ω (w, deg) |
254.627999 |
| M (ma, deg) |
204.941050 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.774 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.774 |
| n |
6.000 |
| gf |
0.994 |
| gb |
-0.795 |
| 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) |
| 2026-03-26 00:00 |
13:24:08.18 |
+00:34:47.2 |
HIP 65483 |
23.49 |
| 2026-03-26 12:00 |
13:23:52.13 |
+00:36:12.2 |
HIP 65483 |
25.70 |
| 2026-03-27 00:00 |
13:23:35.98 |
+00:37:37.1 |
HIP 65483 |
28.40 |
| 2026-03-27 12:00 |
13:23:19.75 |
+00:39:01.9 |
HIP 65483 |
31.47 |
| 2026-03-28 00:00 |
13:23:03.42 |
+00:40:26.6 |
HIP 65483 |
34.83 |
| 2026-03-28 12:00 |
13:22:47.00 |
+00:41:51.1 |
HIP 65483 |
38.40 |
| 2026-03-29 00:00 |
13:22:30.50 |
+00:43:15.4 |
HIP 65211 |
41.69 |
| 2026-03-29 12:00 |
13:22:13.91 |
+00:44:39.6 |
HIP 65211 |
39.50 |
| 2026-03-30 00:00 |
13:21:57.25 |
+00:46:03.5 |
HIP 65211 |
37.70 |
| 2026-03-30 12:00 |
13:21:40.51 |
+00:47:27.3 |
HIP 65211 |
36.36 |
| 2026-03-31 00:00 |
13:21:23.70 |
+00:48:50.8 |
HIP 65211 |
35.51 |
| 2026-03-31 12:00 |
13:21:06.81 |
+00:50:14.0 |
HIP 65211 |
35.22 |
| 2026-04-01 00:00 |
13:20:49.86 |
+00:51:36.9 |
HIP 65211 |
35.50 |
| 2026-04-01 12:00 |
13:20:32.85 |
+00:52:59.6 |
HIP 64960 |
33.43 |
| 2026-04-02 00:00 |
13:20:15.77 |
+00:54:21.9 |
HIP 64960 |
31.46 |
| 2026-04-02 12:00 |
13:19:58.64 |
+00:55:43.9 |
HIP 64930 |
29.46 |
| 2026-04-03 00:00 |
13:19:41.44 |
+00:57:05.5 |
HIP 64930 |
25.37 |
| 2026-04-03 12:00 |
13:19:24.20 |
+00:58:26.8 |
HIP 64930 |
21.43 |
| 2026-04-04 00:00 |
13:19:06.91 |
+00:59:47.6 |
HIP 64930 |
17.78 |
| 2026-04-04 12:00 |
13:18:49.57 |
+01:01:08.1 |
HIP 64930 |
14.62 |
| 2026-04-05 00:00 |
13:18:32.19 |
+01:02:28.1 |
HIP 64930 |
12.36 |
| 2026-04-05 12:00 |
13:18:14.76 |
+01:03:47.7 |
HIP 64930 |
11.55 |
| 2026-04-06 00:00 |
13:17:57.30 |
+01:05:06.9 |
HIP 64930 |
12.47 |
| 2026-04-06 12:00 |
13:17:39.81 |
+01:06:25.5 |
HIP 64799 |
14.40 |
| 2026-04-07 00:00 |
13:17:22.29 |
+01:07:43.6 |
HIP 64799 |
10.13 |
| 2026-04-07 12:00 |
13:17:04.73 |
+01:09:01.3 |
HIP 64799 |
6.28 |
| 2026-04-08 00:00 |
13:16:47.16 |
+01:10:18.3 |
HIP 64799 |
4.27 |
| 2026-04-08 12:00 |
13:16:29.56 |
+01:11:34.9 |
HIP 64799 |
6.25 |
| 2026-04-09 00:00 |
13:16:11.94 |
+01:12:50.8 |
HIP 64799 |
10.10 |
| 2026-04-09 12:00 |
13:15:54.31 |
+01:14:06.2 |
HIP 64799 |
14.39 |
| 2026-04-10 00:00 |
13:15:36.67 |
+01:15:20.9 |
HIP 64799 |
18.82 |
| 2026-04-10 12:00 |
13:15:19.02 |
+01:16:35.0 |
HIP 64586 |
15.89 |
| 2026-04-11 00:00 |
13:15:01.36 |
+01:17:48.5 |
HIP 64586 |
12.00 |
| 2026-04-11 12:00 |
13:14:43.71 |
+01:19:01.3 |
HIP 64586 |
8.78 |
| 2026-04-12 00:00 |
13:14:26.05 |
+01:20:13.4 |
HIP 64586 |
7.21 |
| 2026-04-12 12:00 |
13:14:08.40 |
+01:21:24.8 |
HIP 64556 |
6.56 |
| 2026-04-13 00:00 |
13:13:50.76 |
+01:22:35.5 |
HIP 64556 |
5.10 |
| 2026-04-13 12:00 |
13:13:33.13 |
+01:23:45.4 |
HIP 64556 |
7.12 |
| 2026-04-14 00:00 |
13:13:15.51 |
+01:24:54.6 |
HIP 64556 |
10.81 |
| 2026-04-14 12:00 |
13:12:57.91 |
+01:26:03.0 |
HIP 64556 |
14.98 |
| 2026-04-15 00:00 |
13:12:40.33 |
+01:27:10.6 |
HIP 64556 |
19.31 |
| 2026-04-15 12:00 |
13:12:22.78 |
+01:28:17.4 |
HIP 64556 |
23.71 |
| 2026-04-16 00:00 |
13:12:05.26 |
+01:29:23.4 |
HIP 64311 |
23.09 |