| Parameter |
Value |
| Designation |
C/2007 K4 (Gibbs) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2007-05-03T17:12:48.067200Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:08Z |
| Obs used |
95 |
| NEO |
- |
| M1 |
11.900 |
| K1 |
10.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2007-06-13.0000000 |
| e |
1.00297142 |
| q (au) |
3.527848 |
| a (au) |
-1187.258376 |
| i (deg) |
98.626550 |
| Ω (om, deg) |
68.516312 |
| ω (w, deg) |
162.413892 |
| M (ma, deg) |
0.000971 |
Magnitude
Scatter + Global Linear
$$
M_a = (9.288 + 6.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
9.288 |
| n |
6.000 |
| gf |
0.972 |
| gb |
-1.000 |
| k |
0.999 |
| δ90 |
1.000 |
| 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) |
| 2026-06-01 00:00 |
05:30:53.66 |
-28:29:29.3 |
HIP 25843 |
2.80 |
| 2026-06-01 12:00 |
05:30:57.01 |
-28:29:16.4 |
HIP 25843 |
2.64 |
| 2026-06-02 00:00 |
05:31:00.37 |
-28:29:03.9 |
HIP 25843 |
2.69 |
| 2026-06-02 12:00 |
05:31:03.73 |
-28:28:51.6 |
HIP 25843 |
2.94 |
| 2026-06-03 00:00 |
05:31:07.10 |
-28:28:39.6 |
HIP 25843 |
3.35 |
| 2026-06-03 12:00 |
05:31:10.47 |
-28:28:27.8 |
HIP 25843 |
3.86 |
| 2026-06-04 00:00 |
05:31:13.85 |
-28:28:16.4 |
HIP 25843 |
4.45 |
| 2026-06-04 12:00 |
05:31:17.24 |
-28:28:05.3 |
HIP 25843 |
5.08 |
| 2026-06-05 00:00 |
05:31:20.62 |
-28:27:54.5 |
HIP 25843 |
5.74 |
| 2026-06-05 12:00 |
05:31:24.02 |
-28:27:44.0 |
HIP 25843 |
6.42 |
| 2026-06-06 00:00 |
05:31:27.41 |
-28:27:33.8 |
HIP 25843 |
7.12 |
| 2026-06-06 12:00 |
05:31:30.81 |
-28:27:23.9 |
HIP 25843 |
7.83 |
| 2026-06-07 00:00 |
05:31:34.22 |
-28:27:14.3 |
HIP 25843 |
8.54 |
| 2026-06-07 12:00 |
05:31:37.63 |
-28:27:04.9 |
HIP 25843 |
9.27 |
| 2026-06-08 00:00 |
05:31:41.04 |
-28:26:55.9 |
HIP 25843 |
9.99 |
| 2026-06-08 12:00 |
05:31:44.45 |
-28:26:47.2 |
HIP 25843 |
10.72 |
| 2026-06-09 00:00 |
05:31:47.87 |
-28:26:38.8 |
HIP 25843 |
11.46 |
| 2026-06-09 12:00 |
05:31:51.29 |
-28:26:30.7 |
HIP 25843 |
12.19 |
| 2026-06-10 00:00 |
05:31:54.71 |
-28:26:22.9 |
HIP 25843 |
12.93 |
| 2026-06-10 12:00 |
05:31:58.13 |
-28:26:15.4 |
HIP 25843 |
13.67 |
| 2026-06-11 00:00 |
05:32:01.56 |
-28:26:08.2 |
HIP 25843 |
14.40 |
| 2026-06-11 12:00 |
05:32:04.99 |
-28:26:01.3 |
HIP 25843 |
15.14 |
| 2026-06-12 00:00 |
05:32:08.42 |
-28:25:54.7 |
HIP 25843 |
15.88 |
| 2026-06-12 12:00 |
05:32:11.85 |
-28:25:48.4 |
HIP 25843 |
16.63 |
| 2026-06-13 00:00 |
05:32:15.28 |
-28:25:42.4 |
HIP 25843 |
17.37 |
| 2026-06-13 12:00 |
05:32:18.71 |
-28:25:36.7 |
HIP 25843 |
18.11 |
| 2026-06-14 00:00 |
05:32:22.14 |
-28:25:31.3 |
HIP 25843 |
18.85 |
| 2026-06-14 12:00 |
05:32:25.58 |
-28:25:26.3 |
HIP 25843 |
19.59 |
| 2026-06-15 00:00 |
05:32:29.01 |
-28:25:21.5 |
HIP 25843 |
20.33 |
| 2026-06-15 12:00 |
05:32:32.44 |
-28:25:17.0 |
HIP 25843 |
21.07 |
| 2026-06-16 00:00 |
05:32:35.87 |
-28:25:12.9 |
HIP 25843 |
21.81 |
| 2026-06-16 12:00 |
05:32:39.30 |
-28:25:09.0 |
HIP 25843 |
22.55 |
| 2026-06-17 00:00 |
05:32:42.73 |
-28:25:05.5 |
HIP 26096 |
22.87 |
| 2026-06-17 12:00 |
05:32:46.16 |
-28:25:02.2 |
HIP 26096 |
22.31 |
| 2026-06-18 00:00 |
05:32:49.59 |
-28:24:59.3 |
HIP 26096 |
21.75 |
| 2026-06-18 12:00 |
05:32:53.01 |
-28:24:56.7 |
HIP 26096 |
21.22 |
| 2026-06-19 00:00 |
05:32:56.44 |
-28:24:54.4 |
HIP 26096 |
20.70 |
| 2026-06-19 12:00 |
05:32:59.86 |
-28:24:52.3 |
HIP 26096 |
20.21 |
| 2026-06-20 00:00 |
05:33:03.27 |
-28:24:50.6 |
HIP 26096 |
19.73 |
| 2026-06-20 12:00 |
05:33:06.69 |
-28:24:49.2 |
HIP 26153 |
19.25 |
| 2026-06-21 00:00 |
05:33:10.10 |
-28:24:48.1 |
HIP 26153 |
18.52 |
| 2026-06-21 12:00 |
05:33:13.51 |
-28:24:47.3 |
HIP 26153 |
17.79 |
| 2026-06-22 00:00 |
05:33:16.92 |
-28:24:46.8 |
HIP 26153 |
17.06 |