| Parameter |
Value |
| Designation |
336P/McNaught |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2006-08-18T08:36:24.405120Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:30Z |
| Obs used |
164 |
| NEO |
- |
| M1 |
8.200 |
| K1 |
19.500 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2008-07-30.0000000 |
| e |
0.45286158 |
| q (au) |
2.633290 |
| a (au) |
4.812840 |
| i (deg) |
18.562108 |
| Ω (om, deg) |
299.239956 |
| ω (w, deg) |
313.964670 |
| M (ma, deg) |
66.429832 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.526 + 3.855\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.526 |
| n |
3.855 |
| gf |
0.999 |
| gb |
-0.500 |
| 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) |
| 2026-07-29 00:00 |
09:01:48.22 |
+11:58:26.4 |
HIP 44160 |
31.83 |
| 2026-07-29 12:00 |
09:02:15.23 |
+11:55:53.7 |
HIP 44539 |
37.14 |
| 2026-07-30 00:00 |
09:02:42.26 |
+11:53:20.4 |
HIP 44539 |
32.91 |
| 2026-07-30 12:00 |
09:03:09.31 |
+11:50:46.7 |
HIP 44539 |
29.78 |
| 2026-07-31 00:00 |
09:03:36.38 |
+11:48:12.4 |
HIP 44579 |
24.23 |
| 2026-07-31 12:00 |
09:04:03.46 |
+11:45:37.6 |
HIP 44579 |
17.39 |
| 2026-08-01 00:00 |
09:04:30.57 |
+11:43:02.4 |
HIP 44579 |
10.92 |
| 2026-08-01 12:00 |
09:04:57.68 |
+11:40:26.6 |
HIP 44579 |
6.09 |
| 2026-08-02 00:00 |
09:05:24.82 |
+11:37:50.3 |
HIP 44579 |
7.53 |
| 2026-08-02 12:00 |
09:05:51.97 |
+11:35:13.6 |
HIP 44579 |
13.35 |
| 2026-08-03 00:00 |
09:06:19.13 |
+11:32:36.3 |
HIP 44579 |
20.05 |
| 2026-08-03 12:00 |
09:06:46.31 |
+11:29:58.5 |
HIP 44579 |
27.00 |
| 2026-08-04 00:00 |
09:07:13.51 |
+11:27:20.2 |
HIP 44843 |
32.92 |
| 2026-08-04 12:00 |
09:07:40.71 |
+11:24:41.5 |
HIP 44984 |
32.14 |
| 2026-08-05 00:00 |
09:08:07.93 |
+11:22:02.2 |
HIP 44984 |
26.88 |
| 2026-08-05 12:00 |
09:08:35.17 |
+11:19:22.4 |
HIP 44984 |
22.70 |
| 2026-08-06 00:00 |
09:09:02.41 |
+11:16:42.2 |
HIP 44984 |
20.28 |
| 2026-08-06 12:00 |
09:09:29.67 |
+11:14:01.4 |
HIP 44984 |
20.27 |
| 2026-08-07 00:00 |
09:09:56.93 |
+11:11:20.2 |
HIP 44984 |
22.68 |
| 2026-08-07 12:00 |
09:10:24.21 |
+11:08:38.4 |
HIP 44935 |
26.50 |
| 2026-08-08 00:00 |
09:10:51.50 |
+11:05:56.2 |
HIP 44935 |
29.89 |
| 2026-08-08 12:00 |
09:11:18.80 |
+11:03:13.5 |
HIP 45221 |
33.27 |
| 2026-08-09 00:00 |
09:11:46.10 |
+11:00:30.3 |
HIP 45221 |
26.69 |
| 2026-08-09 12:00 |
09:12:13.41 |
+10:57:46.6 |
HIP 45221 |
20.54 |
| 2026-08-10 00:00 |
09:12:40.73 |
+10:55:02.4 |
HIP 45221 |
15.37 |
| 2026-08-10 12:00 |
09:13:08.06 |
+10:52:17.7 |
HIP 45221 |
12.46 |
| 2026-08-11 00:00 |
09:13:35.39 |
+10:49:32.6 |
HIP 45221 |
13.39 |
| 2026-08-11 12:00 |
09:14:02.73 |
+10:46:47.0 |
HIP 45221 |
17.56 |
| 2026-08-12 00:00 |
09:14:30.07 |
+10:44:00.9 |
HIP 45221 |
23.31 |
| 2026-08-12 12:00 |
09:14:57.42 |
+10:41:14.3 |
HIP 45453 |
22.75 |
| 2026-08-13 00:00 |
09:15:24.77 |
+10:38:27.3 |
HIP 45453 |
17.14 |
| 2026-08-13 12:00 |
09:15:52.12 |
+10:35:39.8 |
HIP 45453 |
13.24 |
| 2026-08-14 00:00 |
09:16:19.47 |
+10:32:51.8 |
HIP 45453 |
12.76 |
| 2026-08-14 12:00 |
09:16:46.82 |
+10:30:03.4 |
HIP 45453 |
16.01 |
| 2026-08-15 00:00 |
09:17:14.18 |
+10:27:14.5 |
HIP 45453 |
21.35 |
| 2026-08-15 12:00 |
09:17:41.53 |
+10:24:25.2 |
HIP 45691 |
25.56 |
| 2026-08-16 00:00 |
09:18:08.88 |
+10:21:35.4 |
HIP 45691 |
24.01 |
| 2026-08-16 12:00 |
09:18:36.24 |
+10:18:45.1 |
HIP 45691 |
24.63 |
| 2026-08-17 00:00 |
09:19:03.58 |
+10:15:54.4 |
HIP 45691 |
27.27 |
| 2026-08-17 12:00 |
09:19:30.93 |
+10:13:03.3 |
HIP 45740 |
25.65 |
| 2026-08-18 00:00 |
09:19:58.27 |
+10:10:11.7 |
HIP 45740 |
23.79 |
| 2026-08-18 12:00 |
09:20:25.61 |
+10:07:19.6 |
HIP 45740 |
24.09 |
| 2026-08-19 00:00 |
09:20:52.95 |
+10:04:27.1 |
HIP 45740 |
26.50 |