| Parameter |
Value |
| Designation |
C/2002 K1 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2002-06-16T10:53:15.109440Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:15Z |
| Obs used |
72 |
| NEO |
- |
| M1 |
11.400 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2002-06-23.0000000 |
| e |
0.99963588 |
| q (au) |
3.230234 |
| a (au) |
8871.406661 |
| i (deg) |
89.721779 |
| Ω (om, deg) |
280.548361 |
| ω (w, deg) |
4.460611 |
| M (ma, deg) |
0.000008 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.814 + 2.141\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.814 |
| n |
2.141 |
| gf |
1.000 |
| gb |
-0.502 |
| k |
1.000 |
| 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
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-06-01 00:00 |
06:53:15.23 |
+49:28:00.7 |
HIP 33051 |
4.32 |
| 2026-06-01 12:00 |
06:53:18.62 |
+49:27:46.3 |
HIP 33051 |
4.76 |
| 2026-06-02 00:00 |
06:53:22.02 |
+49:27:32.0 |
HIP 33051 |
5.23 |
| 2026-06-02 12:00 |
06:53:25.43 |
+49:27:17.9 |
HIP 33051 |
5.72 |
| 2026-06-03 00:00 |
06:53:28.87 |
+49:27:03.8 |
HIP 33051 |
6.24 |
| 2026-06-03 12:00 |
06:53:32.32 |
+49:26:49.8 |
HIP 33051 |
6.77 |
| 2026-06-04 00:00 |
06:53:35.78 |
+49:26:36.0 |
HIP 33051 |
7.31 |
| 2026-06-04 12:00 |
06:53:39.26 |
+49:26:22.2 |
HIP 33051 |
7.86 |
| 2026-06-05 00:00 |
06:53:42.76 |
+49:26:08.6 |
HIP 33051 |
8.42 |
| 2026-06-05 12:00 |
06:53:46.27 |
+49:25:55.1 |
HIP 33051 |
8.99 |
| 2026-06-06 00:00 |
06:53:49.79 |
+49:25:41.7 |
HIP 33051 |
9.56 |
| 2026-06-06 12:00 |
06:53:53.33 |
+49:25:28.4 |
HIP 33051 |
10.14 |
| 2026-06-07 00:00 |
06:53:56.88 |
+49:25:15.3 |
HIP 33051 |
10.73 |
| 2026-06-07 12:00 |
06:54:00.45 |
+49:25:02.2 |
HIP 33051 |
11.32 |
| 2026-06-08 00:00 |
06:54:04.03 |
+49:24:49.3 |
HIP 33051 |
11.91 |
| 2026-06-08 12:00 |
06:54:07.62 |
+49:24:36.5 |
HIP 33051 |
12.50 |
| 2026-06-09 00:00 |
06:54:11.23 |
+49:24:23.8 |
HIP 33051 |
13.10 |
| 2026-06-09 12:00 |
06:54:14.85 |
+49:24:11.2 |
HIP 33051 |
13.70 |
| 2026-06-10 00:00 |
06:54:18.49 |
+49:23:58.8 |
HIP 33051 |
14.31 |
| 2026-06-10 12:00 |
06:54:22.13 |
+49:23:46.4 |
HIP 33051 |
14.91 |
| 2026-06-11 00:00 |
06:54:25.79 |
+49:23:34.2 |
HIP 33051 |
15.52 |
| 2026-06-11 12:00 |
06:54:29.46 |
+49:23:22.1 |
HIP 33051 |
16.13 |
| 2026-06-12 00:00 |
06:54:33.14 |
+49:23:10.1 |
HIP 33051 |
16.74 |
| 2026-06-12 12:00 |
06:54:36.84 |
+49:22:58.3 |
HIP 33051 |
17.36 |
| 2026-06-13 00:00 |
06:54:40.54 |
+49:22:46.6 |
HIP 33051 |
17.98 |
| 2026-06-13 12:00 |
06:54:44.26 |
+49:22:35.0 |
HIP 33051 |
18.59 |
| 2026-06-14 00:00 |
06:54:47.98 |
+49:22:23.5 |
HIP 33051 |
19.21 |
| 2026-06-14 12:00 |
06:54:51.72 |
+49:22:12.1 |
HIP 33051 |
19.84 |
| 2026-06-15 00:00 |
06:54:55.47 |
+49:22:00.9 |
HIP 33051 |
20.46 |
| 2026-06-15 12:00 |
06:54:59.23 |
+49:21:49.8 |
HIP 33051 |
21.08 |
| 2026-06-16 00:00 |
06:55:03.00 |
+49:21:38.8 |
HIP 33051 |
21.71 |
| 2026-06-16 12:00 |
06:55:06.77 |
+49:21:28.0 |
HIP 33051 |
22.33 |
| 2026-06-17 00:00 |
06:55:10.56 |
+49:21:17.2 |
HIP 33051 |
22.96 |
| 2026-06-17 12:00 |
06:55:14.35 |
+49:21:06.6 |
HIP 33051 |
23.59 |
| 2026-06-18 00:00 |
06:55:18.16 |
+49:20:56.2 |
HIP 33051 |
24.22 |
| 2026-06-18 12:00 |
06:55:21.97 |
+49:20:45.8 |
HIP 33051 |
24.85 |
| 2026-06-19 00:00 |
06:55:25.79 |
+49:20:35.6 |
HIP 33051 |
25.48 |
| 2026-06-19 12:00 |
06:55:29.62 |
+49:20:25.6 |
HIP 33051 |
26.11 |
| 2026-06-20 00:00 |
06:55:33.45 |
+49:20:15.6 |
HIP 33051 |
26.75 |
| 2026-06-20 12:00 |
06:55:37.29 |
+49:20:05.8 |
HIP 33217 |
27.12 |
| 2026-06-21 00:00 |
06:55:41.14 |
+49:19:56.1 |
HIP 33217 |
27.17 |
| 2026-06-21 12:00 |
06:55:45.00 |
+49:19:46.6 |
HIP 33217 |
27.24 |
| 2026-06-22 00:00 |
06:55:48.86 |
+49:19:37.1 |
HIP 33217 |
27.32 |