| 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
$$
M_a = (13.480 + 2.073\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
13.480 |
| n |
2.073 |
| gf |
0.975 |
| gb |
-0.678 |
| k |
0.800 |
| δ90 |
9.980 |
| 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 |
+1.1886 |
-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) |
| 2026-06-01 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 |
| 2026-06-02 12:00 |
07:31:41.90 |
+39:35:15.0 |
HIP 36453 |
20.24 |
| 2026-06-03 00:00 |
07:31:44.95 |
+39:35:03.7 |
HIP 36453 |
20.86 |
| 2026-06-03 12:00 |
07:31:48.01 |
+39:34:52.4 |
HIP 36453 |
21.48 |
| 2026-06-04 00:00 |
07:31:51.10 |
+39:34:41.2 |
HIP 36758 |
21.34 |
| 2026-06-04 12:00 |
07:31:54.20 |
+39:34:30.1 |
HIP 36758 |
20.71 |
| 2026-06-05 00:00 |
07:31:57.32 |
+39:34:19.0 |
HIP 36758 |
20.08 |
| 2026-06-05 12:00 |
07:32:00.47 |
+39:34:08.0 |
HIP 36758 |
19.45 |
| 2026-06-06 00:00 |
07:32:03.63 |
+39:33:57.0 |
HIP 36758 |
18.82 |
| 2026-06-06 12:00 |
07:32:06.81 |
+39:33:46.1 |
HIP 36758 |
18.18 |
| 2026-06-07 00:00 |
07:32:10.01 |
+39:33:35.2 |
HIP 36758 |
17.54 |
| 2026-06-07 12:00 |
07:32:13.23 |
+39:33:24.5 |
HIP 36758 |
16.90 |
| 2026-06-08 00:00 |
07:32:16.46 |
+39:33:13.7 |
HIP 36758 |
16.25 |
| 2026-06-08 12:00 |
07:32:19.72 |
+39:33:03.1 |
HIP 36758 |
15.60 |
| 2026-06-09 00:00 |
07:32:22.99 |
+39:32:52.5 |
HIP 36758 |
14.95 |
| 2026-06-09 12:00 |
07:32:26.28 |
+39:32:42.0 |
HIP 36758 |
14.30 |
| 2026-06-10 00:00 |
07:32:29.59 |
+39:32:31.5 |
HIP 36758 |
13.64 |
| 2026-06-10 12:00 |
07:32:32.91 |
+39:32:21.1 |
HIP 36758 |
12.98 |
| 2026-06-11 00:00 |
07:32:36.25 |
+39:32:10.8 |
HIP 36758 |
12.32 |
| 2026-06-11 12:00 |
07:32:39.61 |
+39:32:00.6 |
HIP 36758 |
11.66 |
| 2026-06-12 00:00 |
07:32:42.99 |
+39:31:50.4 |
HIP 36758 |
11.00 |
| 2026-06-12 12:00 |
07:32:46.38 |
+39:31:40.3 |
HIP 36758 |
10.34 |
| 2026-06-13 00:00 |
07:32:49.79 |
+39:31:30.3 |
HIP 36758 |
9.67 |
| 2026-06-13 12:00 |
07:32:53.21 |
+39:31:20.3 |
HIP 36758 |
9.01 |
| 2026-06-14 00:00 |
07:32:56.65 |
+39:31:10.4 |
HIP 36758 |
8.34 |
| 2026-06-14 12:00 |
07:33:00.10 |
+39:31:00.6 |
HIP 36758 |
7.68 |
| 2026-06-15 00:00 |
07:33:03.57 |
+39:30:50.8 |
HIP 36758 |
7.02 |
| 2026-06-15 12:00 |
07:33:07.05 |
+39:30:41.2 |
HIP 36758 |
6.36 |
| 2026-06-16 00:00 |
07:33:10.55 |
+39:30:31.6 |
HIP 36758 |
5.71 |
| 2026-06-16 12:00 |
07:33:14.06 |
+39:30:22.1 |
HIP 36758 |
5.07 |
| 2026-06-17 00:00 |
07:33:17.59 |
+39:30:12.6 |
HIP 36758 |
4.45 |
| 2026-06-17 12:00 |
07:33:21.13 |
+39:30:03.3 |
HIP 36758 |
3.85 |
| 2026-06-18 00:00 |
07:33:24.68 |
+39:29:54.0 |
HIP 36758 |
3.29 |
| 2026-06-18 12:00 |
07:33:28.24 |
+39:29:44.8 |
HIP 36758 |
2.80 |
| 2026-06-19 00:00 |
07:33:31.82 |
+39:29:35.7 |
HIP 36758 |
2.42 |
| 2026-06-19 12:00 |
07:33:35.42 |
+39:29:26.7 |
HIP 36758 |
2.20 |
| 2026-06-20 00:00 |
07:33:39.02 |
+39:29:17.7 |
HIP 36758 |
2.21 |
| 2026-06-20 12:00 |
07:33:42.63 |
+39:29:08.9 |
HIP 36758 |
2.43 |
| 2026-06-21 00:00 |
07:33:46.26 |
+39:29:00.1 |
HIP 36758 |
2.83 |
| 2026-06-21 12:00 |
07:33:49.90 |
+39:28:51.4 |
HIP 36758 |
3.33 |
| 2026-06-22 00:00 |
07:33:53.55 |
+39:28:42.8 |
HIP 36758 |
3.91 |