| Parameter |
Value |
| Designation |
335P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2009-01-22T07:32:06.869760Z |
| Orbit solution date (soln_date, UTC) |
2023-06-01T23:13:11Z |
| Obs used |
430 |
| NEO |
- |
| M1 |
17.000 |
| K1 |
7.750 |
| PC |
- |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-05-16.0000000 |
| e |
0.54345355 |
| q (au) |
1.638014 |
| a (au) |
3.587837 |
| i (deg) |
7.275514 |
| Ω (om, deg) |
330.891145 |
| ω (w, deg) |
162.299106 |
| M (ma, deg) |
69.423380 |
Magnitude
Scatter + Global Linear
$$
M_a = (15.188 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
15.188 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.634 |
| 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 |
22:02:57.37 |
-13:04:35.5 |
HIP 108931 |
17.06 |
| 2026-07-29 12:00 |
22:02:41.29 |
-13:05:49.6 |
HIP 108931 |
21.14 |
| 2026-07-30 00:00 |
22:02:25.11 |
-13:07:04.0 |
HIP 108692 |
20.23 |
| 2026-07-30 12:00 |
22:02:08.81 |
-13:08:18.8 |
HIP 108692 |
16.90 |
| 2026-07-31 00:00 |
22:01:52.41 |
-13:09:34.1 |
HIP 108692 |
14.00 |
| 2026-07-31 12:00 |
22:01:35.91 |
-13:10:49.7 |
HIP 108692 |
11.87 |
| 2026-08-01 00:00 |
22:01:19.31 |
-13:12:05.8 |
HIP 108692 |
11.02 |
| 2026-08-01 12:00 |
22:01:02.61 |
-13:13:22.2 |
HIP 108692 |
11.75 |
| 2026-08-02 00:00 |
22:00:45.82 |
-13:14:38.9 |
HIP 108692 |
13.84 |
| 2026-08-02 12:00 |
22:00:28.93 |
-13:15:56.0 |
HIP 108692 |
16.79 |
| 2026-08-03 00:00 |
22:00:11.94 |
-13:17:13.5 |
HIP 108692 |
20.26 |
| 2026-08-03 12:00 |
21:59:54.87 |
-13:18:31.2 |
HIP 108477 |
20.98 |
| 2026-08-04 00:00 |
21:59:37.71 |
-13:19:49.3 |
HIP 108477 |
17.18 |
| 2026-08-04 12:00 |
21:59:20.46 |
-13:21:07.7 |
HIP 108477 |
13.72 |
| 2026-08-05 00:00 |
21:59:03.13 |
-13:22:26.3 |
HIP 108477 |
10.92 |
| 2026-08-05 12:00 |
21:58:45.72 |
-13:23:45.2 |
HIP 108477 |
9.46 |
| 2026-08-06 00:00 |
21:58:28.23 |
-13:25:04.4 |
HIP 108477 |
9.95 |
| 2026-08-06 12:00 |
21:58:10.66 |
-13:26:23.8 |
HIP 108477 |
12.19 |
| 2026-08-07 00:00 |
21:57:53.02 |
-13:27:43.4 |
HIP 108477 |
15.44 |
| 2026-08-07 12:00 |
21:57:35.31 |
-13:29:03.3 |
HIP 108334 |
12.77 |
| 2026-08-08 00:00 |
21:57:17.52 |
-13:30:23.3 |
HIP 108334 |
10.94 |
| 2026-08-08 12:00 |
21:56:59.68 |
-13:31:43.6 |
HIP 108334 |
10.84 |
| 2026-08-09 00:00 |
21:56:41.76 |
-13:33:04.0 |
HIP 108334 |
12.51 |
| 2026-08-09 12:00 |
21:56:23.79 |
-13:34:24.6 |
HIP 108318 |
14.82 |
| 2026-08-10 00:00 |
21:56:05.76 |
-13:35:45.3 |
HIP 108318 |
15.40 |
| 2026-08-10 12:00 |
21:55:47.67 |
-13:37:06.1 |
HIP 108318 |
17.24 |
| 2026-08-11 00:00 |
21:55:29.52 |
-13:38:27.1 |
HIP 108318 |
19.99 |
| 2026-08-11 12:00 |
21:55:11.33 |
-13:39:48.1 |
HIP 108318 |
23.34 |
| 2026-08-12 00:00 |
21:54:53.09 |
-13:41:09.2 |
HIP 108036 |
24.56 |
| 2026-08-12 12:00 |
21:54:34.80 |
-13:42:30.4 |
HIP 108036 |
20.98 |
| 2026-08-13 00:00 |
21:54:16.48 |
-13:43:51.7 |
HIP 108036 |
17.90 |
| 2026-08-13 12:00 |
21:53:58.11 |
-13:45:13.0 |
HIP 108036 |
15.61 |
| 2026-08-14 00:00 |
21:53:39.71 |
-13:46:34.3 |
HIP 108036 |
14.50 |
| 2026-08-14 12:00 |
21:53:21.27 |
-13:47:55.6 |
HIP 108036 |
14.85 |
| 2026-08-15 00:00 |
21:53:02.80 |
-13:49:16.9 |
HIP 108036 |
16.57 |
| 2026-08-15 12:00 |
21:52:44.31 |
-13:50:38.1 |
HIP 108036 |
19.30 |
| 2026-08-16 00:00 |
21:52:25.79 |
-13:51:59.4 |
HIP 108036 |
22.69 |
| 2026-08-16 12:00 |
21:52:07.24 |
-13:53:20.5 |
HIP 107889 |
24.92 |
| 2026-08-17 00:00 |
21:51:48.68 |
-13:54:41.7 |
HIP 107889 |
25.20 |
| 2026-08-17 12:00 |
21:51:30.10 |
-13:56:02.7 |
HIP 107889 |
26.33 |
| 2026-08-18 00:00 |
21:51:11.51 |
-13:57:23.6 |
HIP 107889 |
28.21 |
| 2026-08-18 12:00 |
21:50:52.91 |
-13:58:44.4 |
HIP 107889 |
30.70 |
| 2026-08-19 00:00 |
21:50:34.30 |
-14:00:05.1 |
HIP 107735 |
29.38 |