| Parameter |
Value |
| Designation |
406P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2007-08-26T19:45:19.710720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:28:45Z |
| Obs used |
193 |
| NEO |
- |
| M1 |
16.700 |
| K1 |
17.750 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-05-14.0000000 |
| e |
0.57404352 |
| q (au) |
1.465341 |
| a (au) |
3.440120 |
| i (deg) |
1.433950 |
| Ω (om, deg) |
8.807182 |
| ω (w, deg) |
353.070367 |
| M (ma, deg) |
96.725441 |
Magnitude
Scatter + Global Linear
$$
M_a = (20.000 + 3.458\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
20.000 |
| n |
3.458 |
| gf |
1.000 |
| gb |
-0.970 |
| 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) |
| 2026-03-26 00:00 |
16:28:26.48 |
-22:45:46.9 |
HIP 80632 |
13.01 |
| 2026-03-26 12:00 |
16:28:27.86 |
-22:46:01.3 |
HIP 80632 |
13.40 |
| 2026-03-27 00:00 |
16:28:28.95 |
-22:46:15.0 |
HIP 80632 |
13.73 |
| 2026-03-27 12:00 |
16:28:29.75 |
-22:46:28.2 |
HIP 80632 |
14.02 |
| 2026-03-28 00:00 |
16:28:30.26 |
-22:46:40.9 |
HIP 80632 |
14.26 |
| 2026-03-28 12:00 |
16:28:30.49 |
-22:46:52.9 |
HIP 80632 |
14.45 |
| 2026-03-29 00:00 |
16:28:30.42 |
-22:47:04.3 |
HIP 80632 |
14.58 |
| 2026-03-29 12:00 |
16:28:30.07 |
-22:47:15.1 |
HIP 80632 |
14.67 |
| 2026-03-30 00:00 |
16:28:29.42 |
-22:47:25.3 |
HIP 80632 |
14.72 |
| 2026-03-30 12:00 |
16:28:28.48 |
-22:47:34.8 |
HIP 80632 |
14.71 |
| 2026-03-31 00:00 |
16:28:27.25 |
-22:47:43.8 |
HIP 80632 |
14.67 |
| 2026-03-31 12:00 |
16:28:25.72 |
-22:47:52.2 |
HIP 80632 |
14.59 |
| 2026-04-01 00:00 |
16:28:23.90 |
-22:48:00.0 |
HIP 80632 |
14.47 |
| 2026-04-01 12:00 |
16:28:21.78 |
-22:48:07.0 |
HIP 80632 |
14.32 |
| 2026-04-02 00:00 |
16:28:19.36 |
-22:48:13.5 |
HIP 80632 |
14.14 |
| 2026-04-02 12:00 |
16:28:16.65 |
-22:48:19.4 |
HIP 80632 |
13.95 |
| 2026-04-03 00:00 |
16:28:13.64 |
-22:48:24.6 |
HIP 80632 |
13.75 |
| 2026-04-03 12:00 |
16:28:10.33 |
-22:48:29.2 |
HIP 80632 |
13.55 |
| 2026-04-04 00:00 |
16:28:06.71 |
-22:48:33.1 |
HIP 80632 |
13.35 |
| 2026-04-04 12:00 |
16:28:02.80 |
-22:48:36.4 |
HIP 80632 |
13.19 |
| 2026-04-05 00:00 |
16:27:58.59 |
-22:48:39.0 |
HIP 80632 |
13.06 |
| 2026-04-05 12:00 |
16:27:54.07 |
-22:48:41.0 |
HIP 80632 |
12.99 |
| 2026-04-06 00:00 |
16:27:49.25 |
-22:48:42.4 |
HIP 80632 |
13.00 |
| 2026-04-06 12:00 |
16:27:44.13 |
-22:48:43.0 |
HIP 80632 |
13.09 |
| 2026-04-07 00:00 |
16:27:38.71 |
-22:48:43.0 |
HIP 80632 |
13.30 |
| 2026-04-07 12:00 |
16:27:32.97 |
-22:48:42.4 |
HIP 80632 |
13.62 |
| 2026-04-08 00:00 |
16:27:26.94 |
-22:48:41.0 |
HIP 80632 |
14.09 |
| 2026-04-08 12:00 |
16:27:20.60 |
-22:48:39.0 |
HIP 80632 |
14.69 |
| 2026-04-09 00:00 |
16:27:13.95 |
-22:48:36.3 |
HIP 80632 |
15.44 |
| 2026-04-09 12:00 |
16:27:07.00 |
-22:48:32.9 |
HIP 80632 |
16.33 |
| 2026-04-10 00:00 |
16:26:59.74 |
-22:48:28.8 |
HIP 80632 |
17.36 |
| 2026-04-10 12:00 |
16:26:52.18 |
-22:48:24.0 |
HIP 80632 |
18.53 |
| 2026-04-11 00:00 |
16:26:44.30 |
-22:48:18.6 |
HIP 80632 |
19.84 |
| 2026-04-11 12:00 |
16:26:36.13 |
-22:48:12.4 |
HIP 80632 |
21.27 |
| 2026-04-12 00:00 |
16:26:27.64 |
-22:48:05.5 |
HIP 80632 |
22.82 |
| 2026-04-12 12:00 |
16:26:18.85 |
-22:47:57.9 |
HIP 80632 |
24.48 |
| 2026-04-13 00:00 |
16:26:09.75 |
-22:47:49.6 |
HIP 80374 |
25.60 |
| 2026-04-13 12:00 |
16:26:00.34 |
-22:47:40.6 |
HIP 80374 |
23.51 |
| 2026-04-14 00:00 |
16:25:50.63 |
-22:47:30.8 |
HIP 80374 |
21.37 |
| 2026-04-14 12:00 |
16:25:40.62 |
-22:47:20.3 |
HIP 80374 |
19.19 |
| 2026-04-15 00:00 |
16:25:30.29 |
-22:47:09.1 |
HIP 80374 |
16.97 |
| 2026-04-15 12:00 |
16:25:19.67 |
-22:46:57.1 |
HIP 80374 |
14.74 |
| 2026-04-16 00:00 |
16:25:08.73 |
-22:46:44.5 |
HIP 80374 |
12.52 |