| Parameter |
Value |
| Designation |
C/2006 E1 (McNaught) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-01-06T09:04:34.311360Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:56Z |
| Obs used |
143 |
| NEO |
- |
| M1 |
10.500 |
| K1 |
4.500 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-09-30.0000000 |
| e |
1.00112179 |
| q (au) |
6.040609 |
| a (au) |
-5384.803014 |
| i (deg) |
83.194197 |
| Ω (om, deg) |
95.035389 |
| ω (w, deg) |
232.766977 |
| M (ma, deg) |
-0.000245 |
Magnitude
Scatter + Global Linear
$$
M_a = (1.757 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
1.757 |
| n |
6.000 |
| gf |
0.999 |
| gb |
-1.000 |
| k |
1.000 |
| δ90 |
9.999 |
| 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 |
06:21:52.78 |
+27:17:01.6 |
HIP 30349 |
17.81 |
| 2026-06-01 12:00 |
06:21:56.10 |
+27:17:03.3 |
HIP 30349 |
17.18 |
| 2026-06-02 00:00 |
06:21:59.43 |
+27:17:04.9 |
HIP 30349 |
16.55 |
| 2026-06-02 12:00 |
06:22:02.77 |
+27:17:06.6 |
HIP 30349 |
15.93 |
| 2026-06-03 00:00 |
06:22:06.13 |
+27:17:08.3 |
HIP 30349 |
15.32 |
| 2026-06-03 12:00 |
06:22:09.49 |
+27:17:10.1 |
HIP 30349 |
14.73 |
| 2026-06-04 00:00 |
06:22:12.87 |
+27:17:11.8 |
HIP 30349 |
14.14 |
| 2026-06-04 12:00 |
06:22:16.25 |
+27:17:13.6 |
HIP 30349 |
13.57 |
| 2026-06-05 00:00 |
06:22:19.65 |
+27:17:15.3 |
HIP 30349 |
13.02 |
| 2026-06-05 12:00 |
06:22:23.05 |
+27:17:17.1 |
HIP 30349 |
12.48 |
| 2026-06-06 00:00 |
06:22:26.47 |
+27:17:18.9 |
HIP 30349 |
11.97 |
| 2026-06-06 12:00 |
06:22:29.90 |
+27:17:20.7 |
HIP 30349 |
11.48 |
| 2026-06-07 00:00 |
06:22:33.33 |
+27:17:22.5 |
HIP 30349 |
11.02 |
| 2026-06-07 12:00 |
06:22:36.78 |
+27:17:24.4 |
HIP 30349 |
10.60 |
| 2026-06-08 00:00 |
06:22:40.23 |
+27:17:26.3 |
HIP 30349 |
10.21 |
| 2026-06-08 12:00 |
06:22:43.69 |
+27:17:28.1 |
HIP 30349 |
9.87 |
| 2026-06-09 00:00 |
06:22:47.16 |
+27:17:30.0 |
HIP 30349 |
9.58 |
| 2026-06-09 12:00 |
06:22:50.64 |
+27:17:31.9 |
HIP 30349 |
9.34 |
| 2026-06-10 00:00 |
06:22:54.13 |
+27:17:33.8 |
HIP 30349 |
9.17 |
| 2026-06-10 12:00 |
06:22:57.63 |
+27:17:35.8 |
HIP 30349 |
9.05 |
| 2026-06-11 00:00 |
06:23:01.13 |
+27:17:37.7 |
HIP 30349 |
9.00 |
| 2026-06-11 12:00 |
06:23:04.64 |
+27:17:39.7 |
HIP 30349 |
9.01 |
| 2026-06-12 00:00 |
06:23:08.16 |
+27:17:41.7 |
HIP 30349 |
9.10 |
| 2026-06-12 12:00 |
06:23:11.69 |
+27:17:43.7 |
HIP 30349 |
9.25 |
| 2026-06-13 00:00 |
06:23:15.22 |
+27:17:45.7 |
HIP 30349 |
9.46 |
| 2026-06-13 12:00 |
06:23:18.76 |
+27:17:47.8 |
HIP 30349 |
9.73 |
| 2026-06-14 00:00 |
06:23:22.31 |
+27:17:49.8 |
HIP 30349 |
10.06 |
| 2026-06-14 12:00 |
06:23:25.86 |
+27:17:51.9 |
HIP 30349 |
10.43 |
| 2026-06-15 00:00 |
06:23:29.41 |
+27:17:54.0 |
HIP 30396 |
10.82 |
| 2026-06-15 12:00 |
06:23:32.98 |
+27:17:56.1 |
HIP 30396 |
10.87 |
| 2026-06-16 00:00 |
06:23:36.55 |
+27:17:58.2 |
HIP 30396 |
10.98 |
| 2026-06-16 12:00 |
06:23:40.12 |
+27:18:00.4 |
HIP 30396 |
11.15 |
| 2026-06-17 00:00 |
06:23:43.70 |
+27:18:02.5 |
HIP 30396 |
11.37 |
| 2026-06-17 12:00 |
06:23:47.28 |
+27:18:04.7 |
HIP 30396 |
11.64 |
| 2026-06-18 00:00 |
06:23:50.87 |
+27:18:06.9 |
HIP 30396 |
11.95 |
| 2026-06-18 12:00 |
06:23:54.46 |
+27:18:09.1 |
HIP 30396 |
12.32 |
| 2026-06-19 00:00 |
06:23:58.05 |
+27:18:11.4 |
HIP 30396 |
12.72 |
| 2026-06-19 12:00 |
06:24:01.65 |
+27:18:13.6 |
HIP 30396 |
13.16 |
| 2026-06-20 00:00 |
06:24:05.25 |
+27:18:15.9 |
HIP 30396 |
13.64 |
| 2026-06-20 12:00 |
06:24:08.86 |
+27:18:18.2 |
HIP 30396 |
14.14 |
| 2026-06-21 00:00 |
06:24:12.47 |
+27:18:20.5 |
HIP 30396 |
14.67 |
| 2026-06-21 12:00 |
06:24:16.08 |
+27:18:22.9 |
HIP 30396 |
15.23 |
| 2026-06-22 00:00 |
06:24:19.69 |
+27:18:25.2 |
HIP 30396 |
15.80 |