388P/Gibbs
| Parameter |
Value |
| Designation |
388P/Gibbs |
| Type |
P |
| Perihelion (tp_cal, UTC) |
2019-07-22T08:53:19.518720Z |
| Orbit solution date (soln_date, UTC) |
2021-09-20T00:13:09Z |
| Obs used |
133 |
| NEO |
- |
| M1 |
10.900 |
| K1 |
18.250 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2014-07-13.0000000 |
| e |
0.61889291 |
| q (au) |
1.996757 |
| a (au) |
5.239360 |
| i (deg) |
23.880476 |
| Ω (om, deg) |
37.155097 |
| ω (w, deg) |
42.471541 |
| M (ma, deg) |
209.162134 |
Magnitude
Scatter + Global Linear
$$
M_a = (11.376 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
11.376 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-0.500 |
| 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 |
17:43:33.57 |
-39:26:23.9 |
HIP 86670 |
27.57 |
| 2026-02-03 12:00 |
17:43:48.68 |
-39:27:20.1 |
HIP 86853 |
25.97 |
| 2026-02-04 00:00 |
17:44:03.71 |
-39:28:16.5 |
HIP 86853 |
24.00 |
| 2026-02-04 12:00 |
17:44:18.66 |
-39:29:13.2 |
HIP 86853 |
22.28 |
| 2026-02-05 00:00 |
17:44:33.52 |
-39:30:10.2 |
HIP 86853 |
20.86 |
| 2026-02-05 12:00 |
17:44:48.30 |
-39:31:07.4 |
HIP 86853 |
19.79 |
| 2026-02-06 00:00 |
17:45:02.99 |
-39:32:04.8 |
HIP 86853 |
19.13 |
| 2026-02-06 12:00 |
17:45:17.59 |
-39:33:02.5 |
HIP 86853 |
18.91 |
| 2026-02-07 00:00 |
17:45:32.11 |
-39:34:00.4 |
HIP 86853 |
19.14 |
| 2026-02-07 12:00 |
17:45:46.54 |
-39:34:58.5 |
HIP 86853 |
19.80 |
| 2026-02-08 00:00 |
17:46:00.88 |
-39:35:56.9 |
HIP 86853 |
20.85 |
| 2026-02-08 12:00 |
17:46:15.12 |
-39:36:55.6 |
HIP 86983 |
21.25 |
| 2026-02-09 00:00 |
17:46:29.28 |
-39:37:54.5 |
HIP 86983 |
22.02 |
| 2026-02-09 12:00 |
17:46:43.34 |
-39:38:53.6 |
HIP 86983 |
23.13 |
| 2026-02-10 00:00 |
17:46:57.31 |
-39:39:53.0 |
HIP 86983 |
24.54 |
| 2026-02-10 12:00 |
17:47:11.19 |
-39:40:52.6 |
HIP 87181 |
21.90 |
| 2026-02-11 00:00 |
17:47:24.97 |
-39:41:52.5 |
HIP 87181 |
19.19 |
| 2026-02-11 12:00 |
17:47:38.66 |
-39:42:52.6 |
HIP 87181 |
16.54 |
| 2026-02-12 00:00 |
17:47:52.25 |
-39:43:52.9 |
HIP 87181 |
13.96 |
| 2026-02-12 12:00 |
17:48:05.74 |
-39:44:53.5 |
HIP 87181 |
11.49 |
| 2026-02-13 00:00 |
17:48:19.13 |
-39:45:54.4 |
HIP 87181 |
9.21 |
| 2026-02-13 12:00 |
17:48:32.43 |
-39:46:55.5 |
HIP 87181 |
7.28 |
| 2026-02-14 00:00 |
17:48:45.62 |
-39:47:56.8 |
HIP 87181 |
6.01 |
| 2026-02-14 12:00 |
17:48:58.71 |
-39:48:58.4 |
HIP 87181 |
5.83 |
| 2026-02-15 00:00 |
17:49:11.70 |
-39:50:00.2 |
HIP 87181 |
6.80 |
| 2026-02-15 12:00 |
17:49:24.59 |
-39:51:02.3 |
HIP 87181 |
8.53 |
| 2026-02-16 00:00 |
17:49:37.37 |
-39:52:04.6 |
HIP 87301 |
8.92 |
| 2026-02-16 12:00 |
17:49:50.05 |
-39:53:07.2 |
HIP 87301 |
7.63 |
| 2026-02-17 00:00 |
17:50:02.62 |
-39:54:10.0 |
HIP 87301 |
7.14 |
| 2026-02-17 12:00 |
17:50:15.09 |
-39:55:13.0 |
HIP 87301 |
7.59 |
| 2026-02-18 00:00 |
17:50:27.45 |
-39:56:16.3 |
HIP 87301 |
8.83 |
| 2026-02-18 12:00 |
17:50:39.70 |
-39:57:19.8 |
HIP 87294 |
9.77 |
| 2026-02-19 00:00 |
17:50:51.84 |
-39:58:23.6 |
HIP 87294 |
10.50 |
| 2026-02-19 12:00 |
17:51:03.87 |
-39:59:27.6 |
HIP 87294 |
11.73 |
| 2026-02-20 00:00 |
17:51:15.79 |
-40:00:31.9 |
HIP 87294 |
13.31 |
| 2026-02-20 12:00 |
17:51:27.60 |
-40:01:36.4 |
HIP 87294 |
15.13 |
| 2026-02-21 00:00 |
17:51:39.30 |
-40:02:41.1 |
HIP 87294 |
17.09 |
| 2026-02-21 12:00 |
17:51:50.88 |
-40:03:46.1 |
HIP 87294 |
19.16 |
| 2026-02-22 00:00 |
17:52:02.35 |
-40:04:51.3 |
HIP 87294 |
21.28 |
| 2026-02-22 12:00 |
17:52:13.70 |
-40:05:56.7 |
HIP 87330 |
22.46 |
| 2026-02-23 00:00 |
17:52:24.94 |
-40:07:02.4 |
HIP 87330 |
23.65 |
| 2026-02-23 12:00 |
17:52:36.07 |
-40:08:08.3 |
HIP 87688 |
24.45 |
| 2026-02-24 00:00 |
17:52:47.07 |
-40:09:14.4 |
HIP 87688 |
22.12 |