| Parameter |
Value |
| Designation |
215P/NEAT |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-10-03T03:11:06.688320Z |
| Orbit solution date (soln_date, UTC) |
2026-04-30T15:12:18Z |
| Obs used |
1051 |
| NEO |
- |
| M1 |
8.900 |
| K1 |
12.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2016-01-23.0000000 |
| e |
0.19510819 |
| q (au) |
3.499171 |
| a (au) |
4.347380 |
| i (deg) |
10.057993 |
| Ω (om, deg) |
61.210767 |
| ω (w, deg) |
255.377155 |
| M (ma, deg) |
213.304327 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.293 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.293 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.768 |
| 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) |
| 2026-05-12 00:00 |
12:58:47.79 |
+02:02:01.9 |
HIP 63455 |
29.16 |
| 2026-05-12 12:00 |
12:58:35.85 |
+02:02:06.8 |
HIP 63455 |
31.25 |
| 2026-05-13 00:00 |
12:58:24.07 |
+02:02:10.4 |
HIP 63455 |
33.45 |
| 2026-05-13 12:00 |
12:58:12.45 |
+02:02:12.7 |
HIP 63455 |
35.74 |
| 2026-05-14 00:00 |
12:58:01.01 |
+02:02:13.6 |
HIP 63235 |
37.56 |
| 2026-05-14 12:00 |
12:57:49.74 |
+02:02:13.1 |
HIP 63235 |
37.01 |
| 2026-05-15 00:00 |
12:57:38.64 |
+02:02:11.3 |
HIP 63235 |
36.64 |
| 2026-05-15 12:00 |
12:57:27.72 |
+02:02:08.1 |
HIP 63235 |
36.46 |
| 2026-05-16 00:00 |
12:57:16.97 |
+02:02:03.5 |
HIP 63235 |
36.46 |
| 2026-05-16 12:00 |
12:57:06.40 |
+02:01:57.6 |
HIP 63037 |
35.75 |
| 2026-05-17 00:00 |
12:56:56.01 |
+02:01:50.3 |
HIP 63037 |
33.60 |
| 2026-05-17 12:00 |
12:56:45.80 |
+02:01:41.6 |
HIP 63037 |
31.56 |
| 2026-05-18 00:00 |
12:56:35.77 |
+02:01:31.6 |
HIP 63037 |
29.66 |
| 2026-05-18 12:00 |
12:56:25.93 |
+02:01:20.1 |
HIP 63037 |
27.90 |
| 2026-05-19 00:00 |
12:56:16.27 |
+02:01:07.3 |
HIP 63037 |
26.30 |
| 2026-05-19 12:00 |
12:56:06.79 |
+02:00:53.1 |
HIP 63037 |
24.89 |
| 2026-05-20 00:00 |
12:55:57.50 |
+02:00:37.5 |
HIP 63037 |
23.67 |
| 2026-05-20 12:00 |
12:55:48.40 |
+02:00:20.6 |
HIP 63037 |
22.68 |
| 2026-05-21 00:00 |
12:55:39.49 |
+02:00:02.3 |
HIP 63037 |
21.92 |
| 2026-05-21 12:00 |
12:55:30.77 |
+01:59:42.6 |
HIP 63037 |
21.41 |
| 2026-05-22 00:00 |
12:55:22.24 |
+01:59:21.5 |
HIP 63037 |
21.15 |
| 2026-05-22 12:00 |
12:55:13.91 |
+01:58:59.0 |
HIP 63037 |
21.14 |
| 2026-05-23 00:00 |
12:55:05.76 |
+01:58:35.2 |
HIP 63037 |
21.36 |
| 2026-05-23 12:00 |
12:54:57.81 |
+01:58:10.1 |
HIP 63037 |
21.80 |
| 2026-05-24 00:00 |
12:54:50.05 |
+01:57:43.5 |
HIP 63037 |
22.43 |
| 2026-05-24 12:00 |
12:54:42.49 |
+01:57:15.6 |
HIP 63037 |
23.23 |
| 2026-05-25 00:00 |
12:54:35.12 |
+01:56:46.4 |
HIP 63037 |
24.16 |
| 2026-05-25 12:00 |
12:54:27.95 |
+01:56:15.8 |
HIP 63037 |
25.21 |
| 2026-05-26 00:00 |
12:54:20.97 |
+01:55:43.8 |
HIP 62849 |
24.89 |
| 2026-05-26 12:00 |
12:54:14.19 |
+01:55:10.5 |
HIP 62849 |
23.67 |
| 2026-05-27 00:00 |
12:54:07.61 |
+01:54:35.9 |
HIP 62849 |
22.57 |
| 2026-05-27 12:00 |
12:54:01.23 |
+01:53:59.9 |
HIP 62849 |
21.61 |
| 2026-05-28 00:00 |
12:53:55.05 |
+01:53:22.6 |
HIP 62835 |
20.50 |
| 2026-05-28 12:00 |
12:53:49.06 |
+01:52:43.9 |
HIP 62835 |
19.14 |
| 2026-05-29 00:00 |
12:53:43.27 |
+01:52:03.9 |
HIP 62835 |
17.88 |
| 2026-05-29 12:00 |
12:53:37.68 |
+01:51:22.6 |
HIP 62835 |
16.74 |
| 2026-05-30 00:00 |
12:53:32.30 |
+01:50:40.0 |
HIP 62835 |
15.72 |
| 2026-05-30 12:00 |
12:53:27.11 |
+01:49:56.1 |
HIP 62835 |
14.85 |
| 2026-05-31 00:00 |
12:53:22.12 |
+01:49:10.8 |
HIP 62835 |
14.13 |
| 2026-05-31 12:00 |
12:53:17.33 |
+01:48:24.3 |
HIP 62835 |
13.58 |
| 2026-06-01 00:00 |
12:53:12.75 |
+01:47:36.4 |
HIP 62835 |
13.22 |
| 2026-06-01 12:00 |
12:53:08.36 |
+01:46:47.3 |
HIP 62835 |
13.04 |
| 2026-06-02 00:00 |
12:53:04.18 |
+01:45:56.8 |
HIP 62835 |
13.06 |