| 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) |
| 2026-05-12 00:00 |
22:12:05.61 |
-12:34:30.1 |
HIP 109528 |
21.57 |
| 2026-05-12 12:00 |
22:12:14.92 |
-12:33:33.6 |
HIP 109528 |
23.72 |
| 2026-05-13 00:00 |
22:12:24.09 |
-12:32:37.8 |
HIP 109528 |
25.90 |
| 2026-05-13 12:00 |
22:12:33.11 |
-12:31:42.7 |
HIP 109528 |
28.09 |
| 2026-05-14 00:00 |
22:12:41.99 |
-12:30:48.4 |
HIP 109528 |
30.27 |
| 2026-05-14 12:00 |
22:12:50.73 |
-12:29:55.0 |
HIP 109811 |
28.48 |
| 2026-05-15 00:00 |
22:12:59.32 |
-12:29:02.2 |
HIP 109811 |
26.24 |
| 2026-05-15 12:00 |
22:13:07.77 |
-12:28:10.3 |
HIP 109811 |
24.03 |
| 2026-05-16 00:00 |
22:13:16.06 |
-12:27:19.2 |
HIP 109811 |
21.87 |
| 2026-05-16 12:00 |
22:13:24.21 |
-12:26:28.9 |
HIP 109811 |
19.75 |
| 2026-05-17 00:00 |
22:13:32.21 |
-12:25:39.3 |
HIP 109811 |
17.68 |
| 2026-05-17 12:00 |
22:13:40.07 |
-12:24:50.6 |
HIP 109811 |
15.66 |
| 2026-05-18 00:00 |
22:13:47.77 |
-12:24:02.7 |
HIP 109811 |
13.69 |
| 2026-05-18 12:00 |
22:13:55.32 |
-12:23:15.6 |
HIP 109811 |
11.79 |
| 2026-05-19 00:00 |
22:14:02.71 |
-12:22:29.3 |
HIP 109811 |
9.97 |
| 2026-05-19 12:00 |
22:14:09.96 |
-12:21:43.9 |
HIP 109811 |
8.24 |
| 2026-05-20 00:00 |
22:14:17.05 |
-12:20:59.3 |
HIP 109811 |
6.65 |
| 2026-05-20 12:00 |
22:14:23.99 |
-12:20:15.5 |
HIP 109811 |
5.29 |
| 2026-05-21 00:00 |
22:14:30.78 |
-12:19:32.5 |
HIP 109811 |
4.31 |
| 2026-05-21 12:00 |
22:14:37.41 |
-12:18:50.4 |
HIP 109811 |
3.97 |
| 2026-05-22 00:00 |
22:14:43.88 |
-12:18:09.1 |
HIP 109811 |
4.35 |
| 2026-05-22 12:00 |
22:14:50.20 |
-12:17:28.7 |
HIP 109811 |
5.27 |
| 2026-05-23 00:00 |
22:14:56.37 |
-12:16:49.1 |
HIP 109811 |
6.47 |
| 2026-05-23 12:00 |
22:15:02.37 |
-12:16:10.3 |
HIP 109811 |
7.80 |
| 2026-05-24 00:00 |
22:15:08.22 |
-12:15:32.5 |
HIP 109811 |
9.18 |
| 2026-05-24 12:00 |
22:15:13.91 |
-12:14:55.4 |
HIP 109811 |
10.57 |
| 2026-05-25 00:00 |
22:15:19.45 |
-12:14:19.3 |
HIP 109811 |
11.95 |
| 2026-05-25 12:00 |
22:15:24.82 |
-12:13:44.0 |
HIP 109811 |
13.31 |
| 2026-05-26 00:00 |
22:15:30.03 |
-12:13:09.5 |
HIP 109811 |
14.65 |
| 2026-05-26 12:00 |
22:15:35.09 |
-12:12:36.0 |
HIP 109811 |
15.96 |
| 2026-05-27 00:00 |
22:15:39.98 |
-12:12:03.3 |
HIP 109811 |
17.23 |
| 2026-05-27 12:00 |
22:15:44.71 |
-12:11:31.4 |
HIP 109811 |
18.47 |
| 2026-05-28 00:00 |
22:15:49.28 |
-12:11:00.5 |
HIP 109811 |
19.67 |
| 2026-05-28 12:00 |
22:15:53.69 |
-12:10:30.4 |
HIP 109811 |
20.83 |
| 2026-05-29 00:00 |
22:15:57.93 |
-12:10:01.2 |
HIP 109811 |
21.95 |
| 2026-05-29 12:00 |
22:16:02.01 |
-12:09:33.0 |
HIP 109811 |
23.03 |
| 2026-05-30 00:00 |
22:16:05.93 |
-12:09:05.6 |
HIP 110065 |
23.19 |
| 2026-05-30 12:00 |
22:16:09.68 |
-12:08:39.0 |
HIP 110065 |
22.40 |
| 2026-05-31 00:00 |
22:16:13.27 |
-12:08:13.4 |
HIP 110065 |
21.67 |
| 2026-05-31 12:00 |
22:16:16.69 |
-12:07:48.7 |
HIP 110065 |
21.00 |
| 2026-06-01 00:00 |
22:16:19.94 |
-12:07:24.9 |
HIP 110065 |
20.37 |
| 2026-06-01 12:00 |
22:16:23.03 |
-12:07:02.0 |
HIP 110065 |
19.80 |
| 2026-06-02 00:00 |
22:16:25.95 |
-12:06:40.0 |
HIP 110065 |
19.28 |