| Parameter |
Value |
| Designation |
C/2009 K4 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-06-19T09:14:16.163520Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:30Z |
| Obs used |
125 |
| NEO |
- |
| M1 |
13.800 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2009-06-09.0000000 |
| e |
0.96252699 |
| q (au) |
1.548875 |
| a (au) |
41.333073 |
| i (deg) |
34.824991 |
| Ω (om, deg) |
30.125128 |
| ω (w, deg) |
127.471471 |
| M (ma, deg) |
359.961482 |
Magnitude
Scatter + Global Linear
$$
M_a = (14.554 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
14.554 |
| n |
6.000 |
| gf |
1.000 |
| gb |
-1.000 |
| 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) |
| 2026-03-26 00:00 |
22:35:44.74 |
-43:58:00.5 |
HIP 111720 |
25.29 |
| 2026-03-26 12:00 |
22:35:49.14 |
-43:57:58.4 |
HIP 111720 |
24.61 |
| 2026-03-27 00:00 |
22:35:53.52 |
-43:57:56.6 |
HIP 111720 |
23.93 |
| 2026-03-27 12:00 |
22:35:57.88 |
-43:57:55.0 |
HIP 111720 |
23.27 |
| 2026-03-28 00:00 |
22:36:02.22 |
-43:57:53.8 |
HIP 111720 |
22.61 |
| 2026-03-28 12:00 |
22:36:06.54 |
-43:57:52.9 |
HIP 111720 |
21.96 |
| 2026-03-29 00:00 |
22:36:10.84 |
-43:57:52.2 |
HIP 111720 |
21.32 |
| 2026-03-29 12:00 |
22:36:15.12 |
-43:57:51.9 |
HIP 111720 |
20.68 |
| 2026-03-30 00:00 |
22:36:19.38 |
-43:57:51.9 |
HIP 111720 |
20.06 |
| 2026-03-30 12:00 |
22:36:23.62 |
-43:57:52.1 |
HIP 111720 |
19.45 |
| 2026-03-31 00:00 |
22:36:27.84 |
-43:57:52.7 |
HIP 111720 |
18.85 |
| 2026-03-31 12:00 |
22:36:32.04 |
-43:57:53.5 |
HIP 111720 |
18.26 |
| 2026-04-01 00:00 |
22:36:36.22 |
-43:57:54.6 |
HIP 111720 |
17.68 |
| 2026-04-01 12:00 |
22:36:40.37 |
-43:57:56.1 |
HIP 111720 |
17.11 |
| 2026-04-02 00:00 |
22:36:44.51 |
-43:57:57.8 |
HIP 111720 |
16.56 |
| 2026-04-02 12:00 |
22:36:48.62 |
-43:57:59.8 |
HIP 111720 |
16.02 |
| 2026-04-03 00:00 |
22:36:52.71 |
-43:58:02.1 |
HIP 111720 |
15.50 |
| 2026-04-03 12:00 |
22:36:56.78 |
-43:58:04.7 |
HIP 111720 |
15.00 |
| 2026-04-04 00:00 |
22:37:00.83 |
-43:58:07.6 |
HIP 111720 |
14.51 |
| 2026-04-04 12:00 |
22:37:04.85 |
-43:58:10.8 |
HIP 111720 |
14.04 |
| 2026-04-05 00:00 |
22:37:08.86 |
-43:58:14.3 |
HIP 111720 |
13.59 |
| 2026-04-05 12:00 |
22:37:12.83 |
-43:58:18.1 |
HIP 111720 |
13.17 |
| 2026-04-06 00:00 |
22:37:16.79 |
-43:58:22.2 |
HIP 111720 |
12.77 |
| 2026-04-06 12:00 |
22:37:20.72 |
-43:58:26.5 |
HIP 111720 |
12.39 |
| 2026-04-07 00:00 |
22:37:24.63 |
-43:58:31.2 |
HIP 111720 |
12.04 |
| 2026-04-07 12:00 |
22:37:28.51 |
-43:58:36.1 |
HIP 111720 |
11.72 |
| 2026-04-08 00:00 |
22:37:32.37 |
-43:58:41.4 |
HIP 111720 |
11.43 |
| 2026-04-08 12:00 |
22:37:36.20 |
-43:58:46.9 |
HIP 111720 |
11.18 |
| 2026-04-09 00:00 |
22:37:40.01 |
-43:58:52.8 |
HIP 111720 |
10.96 |
| 2026-04-09 12:00 |
22:37:43.79 |
-43:58:58.9 |
HIP 111720 |
10.77 |
| 2026-04-10 00:00 |
22:37:47.55 |
-43:59:05.3 |
HIP 111720 |
10.62 |
| 2026-04-10 12:00 |
22:37:51.28 |
-43:59:12.0 |
HIP 111720 |
10.50 |
| 2026-04-11 00:00 |
22:37:54.99 |
-43:59:19.0 |
HIP 111755 |
10.39 |
| 2026-04-11 12:00 |
22:37:58.67 |
-43:59:26.3 |
HIP 111755 |
10.01 |
| 2026-04-12 00:00 |
22:38:02.33 |
-43:59:33.9 |
HIP 111755 |
9.65 |
| 2026-04-12 12:00 |
22:38:05.95 |
-43:59:41.8 |
HIP 111755 |
9.33 |
| 2026-04-13 00:00 |
22:38:09.55 |
-43:59:49.9 |
HIP 111755 |
9.03 |
| 2026-04-13 12:00 |
22:38:13.13 |
-43:59:58.4 |
HIP 111755 |
8.78 |
| 2026-04-14 00:00 |
22:38:16.67 |
-44:00:07.1 |
HIP 111755 |
8.56 |
| 2026-04-14 12:00 |
22:38:20.19 |
-44:00:16.2 |
HIP 111755 |
8.39 |
| 2026-04-15 00:00 |
22:38:23.68 |
-44:00:25.5 |
HIP 111755 |
8.25 |
| 2026-04-15 12:00 |
22:38:27.15 |
-44:00:35.1 |
HIP 111755 |
8.16 |
| 2026-04-16 00:00 |
22:38:30.58 |
-44:00:45.0 |
HIP 111755 |
8.12 |