| 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 |
1.000 |
| 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) |
| 2026-03-26 00:00 |
07:51:07.78 |
+17:55:47.5 |
HIP 38270 |
28.93 |
| 2026-03-26 12:00 |
07:51:06.10 |
+17:55:24.0 |
HIP 38270 |
28.43 |
| 2026-03-27 00:00 |
07:51:04.64 |
+17:55:00.2 |
HIP 38270 |
27.94 |
| 2026-03-27 12:00 |
07:51:03.38 |
+17:54:35.9 |
HIP 38270 |
27.46 |
| 2026-03-28 00:00 |
07:51:02.34 |
+17:54:11.1 |
HIP 38270 |
26.99 |
| 2026-03-28 12:00 |
07:51:01.50 |
+17:53:45.9 |
HIP 38270 |
26.53 |
| 2026-03-29 00:00 |
07:51:00.88 |
+17:53:20.3 |
HIP 38270 |
26.07 |
| 2026-03-29 12:00 |
07:51:00.46 |
+17:52:54.2 |
HIP 38270 |
25.63 |
| 2026-03-30 00:00 |
07:51:00.26 |
+17:52:27.7 |
HIP 38270 |
25.20 |
| 2026-03-30 12:00 |
07:51:00.26 |
+17:52:00.7 |
HIP 38270 |
24.77 |
| 2026-03-31 00:00 |
07:51:00.48 |
+17:51:33.3 |
HIP 38270 |
24.35 |
| 2026-03-31 12:00 |
07:51:00.90 |
+17:51:05.4 |
HIP 38270 |
23.95 |
| 2026-04-01 00:00 |
07:51:01.53 |
+17:50:37.1 |
HIP 38270 |
23.56 |
| 2026-04-01 12:00 |
07:51:02.37 |
+17:50:08.3 |
HIP 38270 |
23.18 |
| 2026-04-02 00:00 |
07:51:03.41 |
+17:49:39.1 |
HIP 38270 |
22.82 |
| 2026-04-02 12:00 |
07:51:04.66 |
+17:49:09.5 |
HIP 38270 |
22.48 |
| 2026-04-03 00:00 |
07:51:06.12 |
+17:48:39.4 |
HIP 38270 |
22.16 |
| 2026-04-03 12:00 |
07:51:07.78 |
+17:48:08.9 |
HIP 38270 |
21.87 |
| 2026-04-04 00:00 |
07:51:09.65 |
+17:47:37.9 |
HIP 38270 |
21.62 |
| 2026-04-04 12:00 |
07:51:11.72 |
+17:47:06.4 |
HIP 38270 |
21.40 |
| 2026-04-05 00:00 |
07:51:14.00 |
+17:46:34.5 |
HIP 38270 |
21.22 |
| 2026-04-05 12:00 |
07:51:16.47 |
+17:46:02.2 |
HIP 38270 |
21.09 |
| 2026-04-06 00:00 |
07:51:19.16 |
+17:45:29.4 |
HIP 38270 |
21.00 |
| 2026-04-06 12:00 |
07:51:22.04 |
+17:44:56.2 |
HIP 38270 |
20.98 |
| 2026-04-07 00:00 |
07:51:25.13 |
+17:44:22.5 |
HIP 38270 |
21.02 |
| 2026-04-07 12:00 |
07:51:28.42 |
+17:43:48.3 |
HIP 38270 |
21.13 |
| 2026-04-08 00:00 |
07:51:31.91 |
+17:43:13.7 |
HIP 38270 |
21.31 |
| 2026-04-08 12:00 |
07:51:35.60 |
+17:42:38.7 |
HIP 38270 |
21.57 |
| 2026-04-09 00:00 |
07:51:39.49 |
+17:42:03.2 |
HIP 38506 |
20.87 |
| 2026-04-09 12:00 |
07:51:43.58 |
+17:41:27.2 |
HIP 38506 |
19.89 |
| 2026-04-10 00:00 |
07:51:47.87 |
+17:40:50.8 |
HIP 38506 |
18.87 |
| 2026-04-10 12:00 |
07:51:52.36 |
+17:40:13.9 |
HIP 38506 |
17.84 |
| 2026-04-11 00:00 |
07:51:57.04 |
+17:39:36.5 |
HIP 38506 |
16.78 |
| 2026-04-11 12:00 |
07:52:01.92 |
+17:38:58.7 |
HIP 38506 |
15.71 |
| 2026-04-12 00:00 |
07:52:07.00 |
+17:38:20.5 |
HIP 38506 |
14.64 |
| 2026-04-12 12:00 |
07:52:12.28 |
+17:37:41.7 |
HIP 38506 |
13.57 |
| 2026-04-13 00:00 |
07:52:17.75 |
+17:37:02.5 |
HIP 38506 |
12.54 |
| 2026-04-13 12:00 |
07:52:23.41 |
+17:36:22.8 |
HIP 38506 |
11.56 |
| 2026-04-14 00:00 |
07:52:29.27 |
+17:35:42.7 |
HIP 38506 |
10.66 |
| 2026-04-14 12:00 |
07:52:35.32 |
+17:35:02.1 |
HIP 38506 |
9.90 |
| 2026-04-15 00:00 |
07:52:41.57 |
+17:34:21.0 |
HIP 38506 |
9.32 |
| 2026-04-15 12:00 |
07:52:48.01 |
+17:33:39.5 |
HIP 38506 |
8.99 |
| 2026-04-16 00:00 |
07:52:54.64 |
+17:32:57.4 |
HIP 38506 |
8.97 |