| 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) |
| 2026-03-26 00:00 |
06:44:15.85 |
+24:49:21.4 |
HIP 32254 |
16.54 |
| 2026-03-26 12:00 |
06:44:15.63 |
+24:49:18.8 |
HIP 32254 |
16.49 |
| 2026-03-27 00:00 |
06:44:15.44 |
+24:49:16.2 |
HIP 32254 |
16.45 |
| 2026-03-27 12:00 |
06:44:15.27 |
+24:49:13.5 |
HIP 32254 |
16.40 |
| 2026-03-28 00:00 |
06:44:15.14 |
+24:49:10.8 |
HIP 32254 |
16.35 |
| 2026-03-28 12:00 |
06:44:15.04 |
+24:49:08.1 |
HIP 32254 |
16.30 |
| 2026-03-29 00:00 |
06:44:14.96 |
+24:49:05.3 |
HIP 32254 |
16.26 |
| 2026-03-29 12:00 |
06:44:14.91 |
+24:49:02.5 |
HIP 32254 |
16.21 |
| 2026-03-30 00:00 |
06:44:14.90 |
+24:48:59.7 |
HIP 32254 |
16.16 |
| 2026-03-30 12:00 |
06:44:14.91 |
+24:48:56.9 |
HIP 32254 |
16.11 |
| 2026-03-31 00:00 |
06:44:14.95 |
+24:48:54.0 |
HIP 32254 |
16.07 |
| 2026-03-31 12:00 |
06:44:15.02 |
+24:48:51.1 |
HIP 32254 |
16.02 |
| 2026-04-01 00:00 |
06:44:15.11 |
+24:48:48.2 |
HIP 32254 |
15.97 |
| 2026-04-01 12:00 |
06:44:15.24 |
+24:48:45.2 |
HIP 32254 |
15.93 |
| 2026-04-02 00:00 |
06:44:15.39 |
+24:48:42.2 |
HIP 32254 |
15.88 |
| 2026-04-02 12:00 |
06:44:15.58 |
+24:48:39.2 |
HIP 32254 |
15.84 |
| 2026-04-03 00:00 |
06:44:15.79 |
+24:48:36.2 |
HIP 32254 |
15.79 |
| 2026-04-03 12:00 |
06:44:16.03 |
+24:48:33.1 |
HIP 32254 |
15.75 |
| 2026-04-04 00:00 |
06:44:16.30 |
+24:48:30.0 |
HIP 32254 |
15.70 |
| 2026-04-04 12:00 |
06:44:16.59 |
+24:48:26.9 |
HIP 32254 |
15.66 |
| 2026-04-05 00:00 |
06:44:16.92 |
+24:48:23.7 |
HIP 32254 |
15.62 |
| 2026-04-05 12:00 |
06:44:17.27 |
+24:48:20.6 |
HIP 32254 |
15.58 |
| 2026-04-06 00:00 |
06:44:17.65 |
+24:48:17.4 |
HIP 32254 |
15.53 |
| 2026-04-06 12:00 |
06:44:18.06 |
+24:48:14.1 |
HIP 32254 |
15.49 |
| 2026-04-07 00:00 |
06:44:18.50 |
+24:48:10.9 |
HIP 32254 |
15.46 |
| 2026-04-07 12:00 |
06:44:18.96 |
+24:48:07.6 |
HIP 32254 |
15.42 |
| 2026-04-08 00:00 |
06:44:19.46 |
+24:48:04.3 |
HIP 32254 |
15.38 |
| 2026-04-08 12:00 |
06:44:19.98 |
+24:48:00.9 |
HIP 32254 |
15.35 |
| 2026-04-09 00:00 |
06:44:20.53 |
+24:47:57.6 |
HIP 32254 |
15.32 |
| 2026-04-09 12:00 |
06:44:21.11 |
+24:47:54.2 |
HIP 32254 |
15.29 |
| 2026-04-10 00:00 |
06:44:21.71 |
+24:47:50.8 |
HIP 32254 |
15.26 |
| 2026-04-10 12:00 |
06:44:22.35 |
+24:47:47.3 |
HIP 32254 |
15.23 |
| 2026-04-11 00:00 |
06:44:23.01 |
+24:47:43.9 |
HIP 32254 |
15.21 |
| 2026-04-11 12:00 |
06:44:23.70 |
+24:47:40.4 |
HIP 32254 |
15.19 |
| 2026-04-12 00:00 |
06:44:24.41 |
+24:47:36.9 |
HIP 32254 |
15.17 |
| 2026-04-12 12:00 |
06:44:25.16 |
+24:47:33.3 |
HIP 32369 |
15.08 |
| 2026-04-13 00:00 |
06:44:25.93 |
+24:47:29.8 |
HIP 32369 |
14.90 |
| 2026-04-13 12:00 |
06:44:26.73 |
+24:47:26.2 |
HIP 32369 |
14.71 |
| 2026-04-14 00:00 |
06:44:27.56 |
+24:47:22.6 |
HIP 32369 |
14.52 |
| 2026-04-14 12:00 |
06:44:28.41 |
+24:47:18.9 |
HIP 32369 |
14.32 |
| 2026-04-15 00:00 |
06:44:29.29 |
+24:47:15.3 |
HIP 32369 |
14.12 |
| 2026-04-15 12:00 |
06:44:30.20 |
+24:47:11.6 |
HIP 32369 |
13.91 |
| 2026-04-16 00:00 |
06:44:31.13 |
+24:47:07.9 |
HIP 32369 |
13.69 |