| 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 |
0.992 |
| 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) |
| 2026-03-26 00:00 |
05:25:44.61 |
-29:35:36.6 |
HIP 25564 |
27.71 |
| 2026-03-26 12:00 |
05:25:45.33 |
-29:34:55.4 |
HIP 25564 |
27.53 |
| 2026-03-27 00:00 |
05:25:46.08 |
-29:34:14.3 |
HIP 25564 |
27.37 |
| 2026-03-27 12:00 |
05:25:46.86 |
-29:33:33.3 |
HIP 25564 |
27.21 |
| 2026-03-28 00:00 |
05:25:47.67 |
-29:32:52.4 |
HIP 25564 |
27.07 |
| 2026-03-28 12:00 |
05:25:48.51 |
-29:32:11.6 |
HIP 25564 |
26.94 |
| 2026-03-29 00:00 |
05:25:49.38 |
-29:31:30.9 |
HIP 25564 |
26.82 |
| 2026-03-29 12:00 |
05:25:50.28 |
-29:30:50.2 |
HIP 25564 |
26.71 |
| 2026-03-30 00:00 |
05:25:51.21 |
-29:30:09.7 |
HIP 25564 |
26.61 |
| 2026-03-30 12:00 |
05:25:52.16 |
-29:29:29.2 |
HIP 25564 |
26.52 |
| 2026-03-31 00:00 |
05:25:53.15 |
-29:28:48.9 |
HIP 25564 |
26.45 |
| 2026-03-31 12:00 |
05:25:54.17 |
-29:28:08.6 |
HIP 25564 |
26.39 |
| 2026-04-01 00:00 |
05:25:55.22 |
-29:27:28.5 |
HIP 25564 |
26.34 |
| 2026-04-01 12:00 |
05:25:56.29 |
-29:26:48.4 |
HIP 25564 |
26.30 |
| 2026-04-02 00:00 |
05:25:57.40 |
-29:26:08.5 |
HIP 25564 |
26.27 |
| 2026-04-02 12:00 |
05:25:58.53 |
-29:25:28.7 |
HIP 25564 |
26.26 |
| 2026-04-03 00:00 |
05:25:59.69 |
-29:24:49.0 |
HIP 25564 |
26.26 |
| 2026-04-03 12:00 |
05:26:00.89 |
-29:24:09.4 |
HIP 25564 |
26.27 |
| 2026-04-04 00:00 |
05:26:02.11 |
-29:23:29.9 |
HIP 25564 |
26.29 |
| 2026-04-04 12:00 |
05:26:03.35 |
-29:22:50.5 |
HIP 25564 |
26.33 |
| 2026-04-05 00:00 |
05:26:04.63 |
-29:22:11.3 |
HIP 25564 |
26.38 |
| 2026-04-05 12:00 |
05:26:05.93 |
-29:21:32.2 |
HIP 25564 |
26.44 |
| 2026-04-06 00:00 |
05:26:07.27 |
-29:20:53.2 |
HIP 25564 |
26.52 |
| 2026-04-06 12:00 |
05:26:08.63 |
-29:20:14.3 |
HIP 25564 |
26.60 |
| 2026-04-07 00:00 |
05:26:10.02 |
-29:19:35.6 |
HIP 25564 |
26.70 |
| 2026-04-07 12:00 |
05:26:11.43 |
-29:18:57.0 |
HIP 25564 |
26.82 |
| 2026-04-08 00:00 |
05:26:12.88 |
-29:18:18.5 |
HIP 25564 |
26.94 |
| 2026-04-08 12:00 |
05:26:14.35 |
-29:17:40.2 |
HIP 25564 |
27.08 |
| 2026-04-09 00:00 |
05:26:15.85 |
-29:17:02.0 |
HIP 25564 |
27.22 |
| 2026-04-09 12:00 |
05:26:17.37 |
-29:16:24.0 |
HIP 25564 |
27.38 |
| 2026-04-10 00:00 |
05:26:18.93 |
-29:15:46.1 |
HIP 25564 |
27.56 |
| 2026-04-10 12:00 |
05:26:20.51 |
-29:15:08.3 |
HIP 25564 |
27.74 |
| 2026-04-11 00:00 |
05:26:22.11 |
-29:14:30.7 |
HIP 25289 |
27.87 |
| 2026-04-11 12:00 |
05:26:23.75 |
-29:13:53.3 |
HIP 25289 |
27.82 |
| 2026-04-12 00:00 |
05:26:25.41 |
-29:13:16.0 |
HIP 25289 |
27.80 |
| 2026-04-12 12:00 |
05:26:27.09 |
-29:12:38.9 |
HIP 25289 |
27.80 |
| 2026-04-13 00:00 |
05:26:28.81 |
-29:12:01.9 |
HIP 25289 |
27.83 |
| 2026-04-13 12:00 |
05:26:30.55 |
-29:11:25.1 |
HIP 25632 |
27.85 |
| 2026-04-14 00:00 |
05:26:32.31 |
-29:10:48.5 |
HIP 25632 |
27.71 |
| 2026-04-14 12:00 |
05:26:34.10 |
-29:10:12.0 |
HIP 25559 |
27.20 |
| 2026-04-15 00:00 |
05:26:35.92 |
-29:09:35.7 |
HIP 25559 |
26.48 |
| 2026-04-15 12:00 |
05:26:37.76 |
-29:08:59.5 |
HIP 25559 |
25.76 |
| 2026-04-16 00:00 |
05:26:39.63 |
-29:08:23.6 |
HIP 25559 |
25.03 |