| 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) |
| 2026-09-20 00:00 |
05:39:17.69 |
-29:29:32.5 |
HIP 26645 |
10.55 |
| 2026-09-20 12:00 |
05:39:17.42 |
-29:30:07.1 |
HIP 26645 |
10.13 |
| 2026-09-21 00:00 |
05:39:17.11 |
-29:30:41.6 |
HIP 26645 |
9.74 |
| 2026-09-21 12:00 |
05:39:16.78 |
-29:31:16.2 |
HIP 26645 |
9.37 |
| 2026-09-22 00:00 |
05:39:16.41 |
-29:31:50.7 |
HIP 26645 |
9.03 |
| 2026-09-22 12:00 |
05:39:16.01 |
-29:32:25.2 |
HIP 26645 |
8.72 |
| 2026-09-23 00:00 |
05:39:15.58 |
-29:32:59.8 |
HIP 26645 |
8.45 |
| 2026-09-23 12:00 |
05:39:15.12 |
-29:33:34.3 |
HIP 26645 |
8.21 |
| 2026-09-24 00:00 |
05:39:14.63 |
-29:34:08.8 |
HIP 26645 |
8.01 |
| 2026-09-24 12:00 |
05:39:14.11 |
-29:34:43.3 |
HIP 26645 |
7.86 |
| 2026-09-25 00:00 |
05:39:13.56 |
-29:35:17.7 |
HIP 26600 |
7.31 |
| 2026-09-25 12:00 |
05:39:12.97 |
-29:35:52.2 |
HIP 26600 |
6.75 |
| 2026-09-26 00:00 |
05:39:12.36 |
-29:36:26.6 |
HIP 26600 |
6.18 |
| 2026-09-26 12:00 |
05:39:11.71 |
-29:37:01.0 |
HIP 26600 |
5.63 |
| 2026-09-27 00:00 |
05:39:11.03 |
-29:37:35.3 |
HIP 26600 |
5.08 |
| 2026-09-27 12:00 |
05:39:10.33 |
-29:38:09.7 |
HIP 26600 |
4.55 |
| 2026-09-28 00:00 |
05:39:09.59 |
-29:38:43.9 |
HIP 26600 |
4.04 |
| 2026-09-28 12:00 |
05:39:08.82 |
-29:39:18.2 |
HIP 26600 |
3.56 |
| 2026-09-29 00:00 |
05:39:08.02 |
-29:39:52.4 |
HIP 26600 |
3.12 |
| 2026-09-29 12:00 |
05:39:07.18 |
-29:40:26.6 |
HIP 26600 |
2.75 |
| 2026-09-30 00:00 |
05:39:06.32 |
-29:41:00.7 |
HIP 26600 |
2.47 |
| 2026-09-30 12:00 |
05:39:05.43 |
-29:41:34.8 |
HIP 26600 |
2.32 |
| 2026-10-01 00:00 |
05:39:04.50 |
-29:42:08.8 |
HIP 26600 |
2.33 |
| 2026-10-01 12:00 |
05:39:03.55 |
-29:42:42.8 |
HIP 26600 |
2.49 |
| 2026-10-02 00:00 |
05:39:02.56 |
-29:43:16.7 |
HIP 26600 |
2.79 |
| 2026-10-02 12:00 |
05:39:01.55 |
-29:43:50.6 |
HIP 26600 |
3.18 |
| 2026-10-03 00:00 |
05:39:00.50 |
-29:44:24.4 |
HIP 26600 |
3.63 |
| 2026-10-03 12:00 |
05:38:59.42 |
-29:44:58.1 |
HIP 26600 |
4.13 |
| 2026-10-04 00:00 |
05:38:58.31 |
-29:45:31.8 |
HIP 26600 |
4.66 |
| 2026-10-04 12:00 |
05:38:57.17 |
-29:46:05.4 |
HIP 26600 |
5.21 |
| 2026-10-05 00:00 |
05:38:56.00 |
-29:46:38.9 |
HIP 26600 |
5.78 |
| 2026-10-05 12:00 |
05:38:54.80 |
-29:47:12.4 |
HIP 26600 |
6.36 |
| 2026-10-06 00:00 |
05:38:53.57 |
-29:47:45.7 |
HIP 26600 |
6.95 |
| 2026-10-06 12:00 |
05:38:52.30 |
-29:48:19.0 |
HIP 26600 |
7.55 |
| 2026-10-07 00:00 |
05:38:51.01 |
-29:48:52.2 |
HIP 26600 |
8.15 |
| 2026-10-07 12:00 |
05:38:49.69 |
-29:49:25.3 |
HIP 26600 |
8.76 |
| 2026-10-08 00:00 |
05:38:48.33 |
-29:49:58.3 |
HIP 26600 |
9.37 |
| 2026-10-08 12:00 |
05:38:46.95 |
-29:50:31.2 |
HIP 26600 |
9.99 |
| 2026-10-09 00:00 |
05:38:45.53 |
-29:51:04.1 |
HIP 26600 |
10.61 |
| 2026-10-09 12:00 |
05:38:44.09 |
-29:51:36.8 |
HIP 26600 |
11.24 |
| 2026-10-10 00:00 |
05:38:42.61 |
-29:52:09.4 |
HIP 26600 |
11.86 |
| 2026-10-10 12:00 |
05:38:41.11 |
-29:52:41.9 |
HIP 26600 |
12.49 |
| 2026-10-11 00:00 |
05:38:39.57 |
-29:53:14.3 |
HIP 26600 |
13.13 |