296P/Garradd
| 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) |
| 2026-02-03 00:00 |
08:23:23.62 |
-08:07:47.2 |
HIP 41155 |
21.32 |
| 2026-02-03 12:00 |
08:22:56.30 |
-08:07:40.8 |
HIP 40959 |
21.07 |
| 2026-02-04 00:00 |
08:22:29.01 |
-08:07:31.9 |
HIP 40959 |
14.52 |
| 2026-02-04 12:00 |
08:22:01.77 |
-08:07:20.4 |
HIP 40959 |
8.34 |
| 2026-02-05 00:00 |
08:21:34.57 |
-08:07:06.3 |
HIP 40959 |
4.43 |
| 2026-02-05 12:00 |
08:21:07.43 |
-08:06:49.7 |
HIP 40937 |
3.92 |
| 2026-02-06 00:00 |
08:20:40.35 |
-08:06:30.5 |
HIP 40937 |
9.23 |
| 2026-02-06 12:00 |
08:20:13.33 |
-08:06:08.8 |
HIP 40937 |
15.64 |
| 2026-02-07 00:00 |
08:19:46.38 |
-08:05:44.6 |
HIP 40937 |
22.19 |
| 2026-02-07 12:00 |
08:19:19.52 |
-08:05:17.9 |
HIP 40937 |
28.79 |
| 2026-02-08 00:00 |
08:18:52.73 |
-08:04:48.7 |
HIP 40694 |
31.31 |
| 2026-02-08 12:00 |
08:18:26.03 |
-08:04:17.0 |
HIP 40694 |
30.01 |
| 2026-02-09 00:00 |
08:17:59.43 |
-08:03:42.9 |
HIP 40694 |
30.09 |
| 2026-02-09 12:00 |
08:17:32.93 |
-08:03:06.3 |
HIP 40694 |
31.55 |
| 2026-02-10 00:00 |
08:17:06.53 |
-08:02:27.3 |
HIP 40694 |
34.19 |
| 2026-02-10 12:00 |
08:16:40.24 |
-08:01:46.0 |
HIP 40694 |
37.75 |
| 2026-02-11 00:00 |
08:16:14.07 |
-08:01:02.2 |
HIP 40468 |
41.34 |
| 2026-02-11 12:00 |
08:15:48.02 |
-08:00:16.1 |
HIP 40468 |
40.08 |
| 2026-02-12 00:00 |
08:15:22.10 |
-07:59:27.7 |
HIP 40468 |
39.81 |
| 2026-02-12 12:00 |
08:14:56.32 |
-07:58:36.9 |
HIP 40468 |
40.53 |
| 2026-02-13 00:00 |
08:14:30.67 |
-07:57:43.9 |
HIP 40145 |
39.84 |
| 2026-02-13 12:00 |
08:14:05.16 |
-07:56:48.6 |
HIP 40145 |
33.99 |
| 2026-02-14 00:00 |
08:13:39.81 |
-07:55:51.1 |
HIP 40145 |
28.41 |
| 2026-02-14 12:00 |
08:13:14.61 |
-07:54:51.3 |
HIP 40145 |
23.27 |
| 2026-02-15 00:00 |
08:12:49.58 |
-07:53:49.4 |
HIP 40145 |
18.93 |
| 2026-02-15 12:00 |
08:12:24.70 |
-07:52:45.3 |
HIP 40107 |
14.31 |
| 2026-02-16 00:00 |
08:12:00.01 |
-07:51:39.1 |
HIP 40107 |
8.53 |
| 2026-02-16 12:00 |
08:11:35.48 |
-07:50:30.8 |
HIP 40107 |
4.21 |
| 2026-02-17 00:00 |
08:11:11.14 |
-07:49:20.4 |
HIP 40107 |
6.19 |
| 2026-02-17 12:00 |
08:10:46.99 |
-07:48:08.0 |
HIP 40107 |
11.54 |
| 2026-02-18 00:00 |
08:10:23.03 |
-07:46:53.5 |
HIP 40107 |
17.35 |
| 2026-02-18 12:00 |
08:09:59.26 |
-07:45:37.1 |
HIP 40107 |
23.24 |
| 2026-02-19 00:00 |
08:09:35.70 |
-07:44:18.7 |
HIP 40107 |
29.14 |
| 2026-02-19 12:00 |
08:09:12.34 |
-07:42:58.4 |
HIP 40107 |
35.01 |
| 2026-02-20 00:00 |
08:08:49.20 |
-07:41:36.2 |
HIP 39654 |
38.69 |
| 2026-02-20 12:00 |
08:08:26.27 |
-07:40:12.2 |
HIP 39654 |
33.24 |
| 2026-02-21 00:00 |
08:08:03.57 |
-07:38:46.3 |
HIP 39654 |
28.01 |
| 2026-02-21 12:00 |
08:07:41.09 |
-07:37:18.7 |
HIP 39654 |
23.11 |
| 2026-02-22 00:00 |
08:07:18.83 |
-07:35:49.3 |
HIP 39654 |
18.78 |
| 2026-02-22 12:00 |
08:06:56.82 |
-07:34:18.2 |
HIP 39654 |
15.43 |
| 2026-02-23 00:00 |
08:06:35.04 |
-07:32:45.4 |
HIP 39654 |
13.75 |
| 2026-02-23 12:00 |
08:06:13.50 |
-07:31:11.0 |
HIP 39654 |
14.28 |
| 2026-02-24 00:00 |
08:05:52.21 |
-07:29:35.0 |
HIP 39654 |
16.76 |