| Parameter |
Value |
| Designation |
C/2006 O2 (Garradd) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2006-10-05T09:45:32.495040Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:30:58Z |
| Obs used |
84 |
| NEO |
- |
| M1 |
15.200 |
| K1 |
5.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2006-09-06.0000000 |
| e |
0.99635182 |
| q (au) |
1.554794 |
| a (au) |
426.184127 |
| i (deg) |
43.028733 |
| Ω (om, deg) |
283.358310 |
| ω (w, deg) |
19.984383 |
| M (ma, deg) |
359.996706 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.817 + 3.338\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.817 |
| n |
3.338 |
| gf |
1.000 |
| gb |
-1.000 |
| k |
0.800 |
| 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 |
06:53:40.92 |
+24:30:02.3 |
HIP 33212 |
20.80 |
| 2026-07-29 12:00 |
06:53:43.90 |
+24:29:57.7 |
HIP 33212 |
20.29 |
| 2026-07-30 00:00 |
06:53:46.88 |
+24:29:53.1 |
HIP 33212 |
19.79 |
| 2026-07-30 12:00 |
06:53:49.85 |
+24:29:48.5 |
HIP 33212 |
19.30 |
| 2026-07-31 00:00 |
06:53:52.81 |
+24:29:43.9 |
HIP 33212 |
18.83 |
| 2026-07-31 12:00 |
06:53:55.75 |
+24:29:39.4 |
HIP 33212 |
18.37 |
| 2026-08-01 00:00 |
06:53:58.69 |
+24:29:34.8 |
HIP 33212 |
17.92 |
| 2026-08-01 12:00 |
06:54:01.61 |
+24:29:30.3 |
HIP 33212 |
17.49 |
| 2026-08-02 00:00 |
06:54:04.52 |
+24:29:25.8 |
HIP 33212 |
17.08 |
| 2026-08-02 12:00 |
06:54:07.42 |
+24:29:21.4 |
HIP 33212 |
16.69 |
| 2026-08-03 00:00 |
06:54:10.31 |
+24:29:16.9 |
HIP 33212 |
16.31 |
| 2026-08-03 12:00 |
06:54:13.19 |
+24:29:12.5 |
HIP 33212 |
15.96 |
| 2026-08-04 00:00 |
06:54:16.05 |
+24:29:08.1 |
HIP 33212 |
15.63 |
| 2026-08-04 12:00 |
06:54:18.90 |
+24:29:03.7 |
HIP 33212 |
15.32 |
| 2026-08-05 00:00 |
06:54:21.74 |
+24:28:59.3 |
HIP 33212 |
15.03 |
| 2026-08-05 12:00 |
06:54:24.56 |
+24:28:55.0 |
HIP 33212 |
14.77 |
| 2026-08-06 00:00 |
06:54:27.37 |
+24:28:50.7 |
HIP 33212 |
14.53 |
| 2026-08-06 12:00 |
06:54:30.17 |
+24:28:46.4 |
HIP 33212 |
14.32 |
| 2026-08-07 00:00 |
06:54:32.96 |
+24:28:42.1 |
HIP 33212 |
14.13 |
| 2026-08-07 12:00 |
06:54:35.73 |
+24:28:37.9 |
HIP 33212 |
13.98 |
| 2026-08-08 00:00 |
06:54:38.49 |
+24:28:33.6 |
HIP 33212 |
13.85 |
| 2026-08-08 12:00 |
06:54:41.23 |
+24:28:29.4 |
HIP 33212 |
13.75 |
| 2026-08-09 00:00 |
06:54:43.96 |
+24:28:25.2 |
HIP 33212 |
13.68 |
| 2026-08-09 12:00 |
06:54:46.68 |
+24:28:21.1 |
HIP 33212 |
13.63 |
| 2026-08-10 00:00 |
06:54:49.38 |
+24:28:17.0 |
HIP 33212 |
13.62 |
| 2026-08-10 12:00 |
06:54:52.06 |
+24:28:12.9 |
HIP 33212 |
13.63 |
| 2026-08-11 00:00 |
06:54:54.73 |
+24:28:08.8 |
HIP 33212 |
13.67 |
| 2026-08-11 12:00 |
06:54:57.39 |
+24:28:04.7 |
HIP 33212 |
13.74 |
| 2026-08-12 00:00 |
06:55:00.03 |
+24:28:00.7 |
HIP 33212 |
13.83 |
| 2026-08-12 12:00 |
06:55:02.65 |
+24:27:56.7 |
HIP 33212 |
13.95 |
| 2026-08-13 00:00 |
06:55:05.26 |
+24:27:52.7 |
HIP 33212 |
14.09 |
| 2026-08-13 12:00 |
06:55:07.85 |
+24:27:48.7 |
HIP 33212 |
14.25 |
| 2026-08-14 00:00 |
06:55:10.42 |
+24:27:44.8 |
HIP 33212 |
14.44 |
| 2026-08-14 12:00 |
06:55:12.98 |
+24:27:40.9 |
HIP 33212 |
14.64 |
| 2026-08-15 00:00 |
06:55:15.53 |
+24:27:37.1 |
HIP 33212 |
14.87 |
| 2026-08-15 12:00 |
06:55:18.05 |
+24:27:33.2 |
HIP 33212 |
15.11 |
| 2026-08-16 00:00 |
06:55:20.56 |
+24:27:29.4 |
HIP 33212 |
15.37 |
| 2026-08-16 12:00 |
06:55:23.05 |
+24:27:25.6 |
HIP 33212 |
15.64 |
| 2026-08-17 00:00 |
06:55:25.53 |
+24:27:21.8 |
HIP 33212 |
15.93 |
| 2026-08-17 12:00 |
06:55:27.98 |
+24:27:18.1 |
HIP 33212 |
16.23 |
| 2026-08-18 00:00 |
06:55:30.42 |
+24:27:14.4 |
HIP 33212 |
16.54 |
| 2026-08-18 12:00 |
06:55:32.84 |
+24:27:10.7 |
HIP 33212 |
16.86 |
| 2026-08-19 00:00 |
06:55:35.25 |
+24:27:07.1 |
HIP 33212 |
17.19 |