| Parameter |
Value |
| Designation |
C/2006 K4 (NEAT) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-11-29T07:13:52.665600Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
470 |
| NEO |
- |
| M1 |
11.600 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-06-04.0000000 |
| e |
0.99824946 |
| q (au) |
3.188616 |
| a (au) |
1821.503573 |
| i (deg) |
111.333754 |
| Ω (om, deg) |
116.596913 |
| ω (w, deg) |
233.604103 |
| M (ma, deg) |
359.997739 |
Magnitude
Scatter + Global Linear
$$
M_a = (13.478 + 2.073\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.478 |
| n |
2.073 |
| gf |
1.000 |
| gb |
-0.678 |
| k |
0.800 |
| δ90 |
9.960 |
| 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
Residuals (Piecewise)
$$\epsilon = a \log_{10} r_{\mathrm{au}} + b$$
| Start (UTC) |
End (UTC) |
a |
b |
| 2006-05-18 |
2007-09-08 |
+1.1887 |
-1.214 |
| 2008-01-26 |
2009-11-20 |
+0.0139 |
-0.066 |
log10 r = log10(heliocentric distance / AU), Δ = geocentric distance (AU)
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
07:29:53.04 |
+39:44:03.1 |
HIP 36453 |
2.60 |
| 2026-05-12 12:00 |
07:29:55.02 |
+39:43:50.1 |
HIP 36453 |
2.17 |
| 2026-05-13 00:00 |
07:29:57.03 |
+39:43:37.2 |
HIP 36453 |
1.74 |
| 2026-05-13 12:00 |
07:29:59.06 |
+39:43:24.4 |
HIP 36453 |
1.31 |
| 2026-05-14 00:00 |
07:30:01.13 |
+39:43:11.5 |
HIP 36453 |
0.90 |
| 2026-05-14 12:00 |
07:30:03.22 |
+39:42:58.6 |
HIP 36453 |
0.56 |
| 2026-05-15 00:00 |
07:30:05.35 |
+39:42:45.8 |
HIP 36453 |
0.49 |
| 2026-05-15 12:00 |
07:30:07.50 |
+39:42:33.0 |
HIP 36453 |
0.77 |
| 2026-05-16 00:00 |
07:30:09.68 |
+39:42:20.2 |
HIP 36453 |
1.18 |
| 2026-05-16 12:00 |
07:30:11.88 |
+39:42:07.5 |
HIP 36453 |
1.63 |
| 2026-05-17 00:00 |
07:30:14.12 |
+39:41:54.7 |
HIP 36453 |
2.09 |
| 2026-05-17 12:00 |
07:30:16.38 |
+39:41:42.0 |
HIP 36453 |
2.57 |
| 2026-05-18 00:00 |
07:30:18.67 |
+39:41:29.3 |
HIP 36453 |
3.05 |
| 2026-05-18 12:00 |
07:30:20.98 |
+39:41:16.7 |
HIP 36453 |
3.54 |
| 2026-05-19 00:00 |
07:30:23.32 |
+39:41:04.1 |
HIP 36453 |
4.04 |
| 2026-05-19 12:00 |
07:30:25.69 |
+39:40:51.5 |
HIP 36453 |
4.54 |
| 2026-05-20 00:00 |
07:30:28.09 |
+39:40:38.9 |
HIP 36453 |
5.04 |
| 2026-05-20 12:00 |
07:30:30.51 |
+39:40:26.4 |
HIP 36453 |
5.55 |
| 2026-05-21 00:00 |
07:30:32.96 |
+39:40:13.9 |
HIP 36453 |
6.06 |
| 2026-05-21 12:00 |
07:30:35.43 |
+39:40:01.4 |
HIP 36453 |
6.58 |
| 2026-05-22 00:00 |
07:30:37.93 |
+39:39:49.0 |
HIP 36453 |
7.11 |
| 2026-05-22 12:00 |
07:30:40.45 |
+39:39:36.6 |
HIP 36453 |
7.63 |
| 2026-05-23 00:00 |
07:30:43.00 |
+39:39:24.2 |
HIP 36453 |
8.17 |
| 2026-05-23 12:00 |
07:30:45.57 |
+39:39:11.9 |
HIP 36453 |
8.70 |
| 2026-05-24 00:00 |
07:30:48.17 |
+39:38:59.7 |
HIP 36453 |
9.24 |
| 2026-05-24 12:00 |
07:30:50.79 |
+39:38:47.4 |
HIP 36453 |
9.79 |
| 2026-05-25 00:00 |
07:30:53.44 |
+39:38:35.2 |
HIP 36453 |
10.33 |
| 2026-05-25 12:00 |
07:30:56.11 |
+39:38:23.1 |
HIP 36453 |
10.89 |
| 2026-05-26 00:00 |
07:30:58.80 |
+39:38:11.0 |
HIP 36453 |
11.44 |
| 2026-05-26 12:00 |
07:31:01.52 |
+39:37:58.9 |
HIP 36453 |
12.00 |
| 2026-05-27 00:00 |
07:31:04.26 |
+39:37:46.9 |
HIP 36453 |
12.57 |
| 2026-05-27 12:00 |
07:31:07.02 |
+39:37:34.9 |
HIP 36453 |
13.14 |
| 2026-05-28 00:00 |
07:31:09.81 |
+39:37:23.0 |
HIP 36453 |
13.71 |
| 2026-05-28 12:00 |
07:31:12.62 |
+39:37:11.1 |
HIP 36453 |
14.28 |
| 2026-05-29 00:00 |
07:31:15.45 |
+39:36:59.2 |
HIP 36453 |
14.86 |
| 2026-05-29 12:00 |
07:31:18.30 |
+39:36:47.5 |
HIP 36453 |
15.45 |
| 2026-05-30 00:00 |
07:31:21.18 |
+39:36:35.7 |
HIP 36453 |
16.03 |
| 2026-05-30 12:00 |
07:31:24.07 |
+39:36:24.0 |
HIP 36453 |
16.63 |
| 2026-05-31 00:00 |
07:31:26.99 |
+39:36:12.4 |
HIP 36453 |
17.22 |
| 2026-05-31 12:00 |
07:31:29.93 |
+39:36:00.8 |
HIP 36453 |
17.82 |
| 2026-06-01 00:00 |
07:31:32.89 |
+39:35:49.3 |
HIP 36453 |
18.42 |
| 2026-06-01 12:00 |
07:31:35.88 |
+39:35:37.8 |
HIP 36453 |
19.02 |
| 2026-06-02 00:00 |
07:31:38.88 |
+39:35:26.4 |
HIP 36453 |
19.63 |