| Parameter |
Value |
| Designation |
296P/Garradd |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2014-03-01T06:43:40.719360Z |
| Orbit solution date (soln_date, UTC) |
2021-07-01T22:13:08Z |
| Obs used |
333 |
| NEO |
- |
| M1 |
12.800 |
| K1 |
15.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-07-21.0000000 |
| e |
0.47734904 |
| q (au) |
1.830682 |
| a (au) |
3.502686 |
| i (deg) |
25.203980 |
| Ω (om, deg) |
263.676488 |
| ω (w, deg) |
350.027681 |
| M (ma, deg) |
21.307492 |
Magnitude
Scatter + Global Linear
$$
M_a = (12.031 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
12.031 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.998 |
| 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) |
| 2026-06-01 00:00 |
08:32:37.83 |
-03:06:51.2 |
HIP 41901 |
3.89 |
| 2026-06-01 12:00 |
08:33:10.84 |
-03:07:26.8 |
HIP 41901 |
8.76 |
| 2026-06-02 00:00 |
08:33:44.03 |
-03:08:04.1 |
HIP 41991 |
9.92 |
| 2026-06-02 12:00 |
08:34:17.39 |
-03:08:42.9 |
HIP 41991 |
15.21 |
| 2026-06-03 00:00 |
08:34:50.91 |
-03:09:23.4 |
HIP 41991 |
22.49 |
| 2026-06-03 12:00 |
08:35:24.60 |
-03:10:05.5 |
HIP 42081 |
27.45 |
| 2026-06-04 00:00 |
08:35:58.46 |
-03:10:49.2 |
HIP 42320 |
30.03 |
| 2026-06-04 12:00 |
08:36:32.49 |
-03:11:34.6 |
HIP 42320 |
22.73 |
| 2026-06-05 00:00 |
08:37:06.68 |
-03:12:21.5 |
HIP 42320 |
16.60 |
| 2026-06-05 12:00 |
08:37:41.04 |
-03:13:10.1 |
HIP 42320 |
13.44 |
| 2026-06-06 00:00 |
08:38:15.56 |
-03:14:00.3 |
HIP 42320 |
15.29 |
| 2026-06-06 12:00 |
08:38:50.24 |
-03:14:52.1 |
HIP 42320 |
20.92 |
| 2026-06-07 00:00 |
08:39:25.09 |
-03:15:45.6 |
HIP 42320 |
28.19 |
| 2026-06-07 12:00 |
08:40:00.09 |
-03:16:40.7 |
HIP 42700 |
35.05 |
| 2026-06-08 00:00 |
08:40:35.26 |
-03:17:37.4 |
HIP 42700 |
27.67 |
| 2026-06-08 12:00 |
08:41:10.58 |
-03:18:35.7 |
HIP 42700 |
21.42 |
| 2026-06-09 00:00 |
08:41:46.07 |
-03:19:35.7 |
HIP 42700 |
17.59 |
| 2026-06-09 12:00 |
08:42:21.71 |
-03:20:37.3 |
HIP 42700 |
17.90 |
| 2026-06-10 00:00 |
08:42:57.51 |
-03:21:40.6 |
HIP 42700 |
22.21 |
| 2026-06-10 12:00 |
08:43:33.46 |
-03:22:45.4 |
HIP 42700 |
28.83 |
| 2026-06-11 00:00 |
08:44:09.57 |
-03:23:52.0 |
HIP 42960 |
25.24 |
| 2026-06-11 12:00 |
08:44:45.84 |
-03:25:00.1 |
HIP 42960 |
18.56 |
| 2026-06-12 00:00 |
08:45:22.25 |
-03:26:09.9 |
HIP 42960 |
14.73 |
| 2026-06-12 12:00 |
08:45:58.83 |
-03:27:21.4 |
HIP 42960 |
16.05 |
| 2026-06-13 00:00 |
08:46:35.55 |
-03:28:34.4 |
HIP 42960 |
21.64 |
| 2026-06-13 12:00 |
08:47:12.42 |
-03:29:49.2 |
HIP 43165 |
27.97 |
| 2026-06-14 00:00 |
08:47:49.44 |
-03:31:05.5 |
HIP 43305 |
23.47 |
| 2026-06-14 12:00 |
08:48:26.62 |
-03:32:23.6 |
HIP 43305 |
14.93 |
| 2026-06-15 00:00 |
08:49:03.94 |
-03:33:43.2 |
HIP 43305 |
8.41 |
| 2026-06-15 12:00 |
08:49:41.40 |
-03:35:04.6 |
HIP 43305 |
9.81 |
| 2026-06-16 00:00 |
08:50:19.02 |
-03:36:27.5 |
HIP 43305 |
17.38 |
| 2026-06-16 12:00 |
08:50:56.78 |
-03:37:52.1 |
HIP 43305 |
26.26 |
| 2026-06-17 00:00 |
08:51:34.68 |
-03:39:18.4 |
HIP 43305 |
35.53 |
| 2026-06-17 12:00 |
08:52:12.72 |
-03:40:46.3 |
HIP 43397 |
41.12 |
| 2026-06-18 00:00 |
08:52:50.91 |
-03:42:15.8 |
HIP 43774 |
33.03 |
| 2026-06-18 12:00 |
08:53:29.24 |
-03:43:47.0 |
HIP 43774 |
24.57 |
| 2026-06-19 00:00 |
08:54:07.70 |
-03:45:19.8 |
HIP 43786 |
17.29 |
| 2026-06-19 12:00 |
08:54:46.31 |
-03:46:54.2 |
HIP 43786 |
9.26 |
| 2026-06-20 00:00 |
08:55:25.05 |
-03:48:30.3 |
HIP 43786 |
7.93 |
| 2026-06-20 12:00 |
08:56:03.93 |
-03:50:08.0 |
HIP 43786 |
15.26 |
| 2026-06-21 00:00 |
08:56:42.95 |
-03:51:47.3 |
HIP 43786 |
24.44 |
| 2026-06-21 12:00 |
08:57:22.10 |
-03:53:28.3 |
HIP 44038 |
21.63 |
| 2026-06-22 00:00 |
08:58:01.39 |
-03:55:10.9 |
HIP 44124 |
18.23 |